HP Hewlett Packard Network Card A5150A User Manual

HP A5150A P CI Du a l Por t Ultr a 2 SCSI  
Host Bu s Ad a p ter  
Ser vice a n d User Gu id e  
Ed ition 2  
Customer Order Number: A5150-90001  
Ma n u fa ctu r in g Pa r t Nu m ber : A5150-96002  
E0201  
U.S.A.  
© Copyright 2001, Hewlett-Packard Company.  
 
California.  
©copyright 1980, 1984, 1986 Novell, Inc.  
©copyright 1986-1992 Sun Microsystems, Inc.  
©copyright 1985-86, 1988 Massachusetts Institute of Technology.  
©copyright 1989-93 The Open Software Foundation, Inc.  
©copyright 1986 Digital Equipment Corporation.  
©copyright 1990 Motorola, Inc.  
©copyright 1990, 1991, 1992 Cornell University  
©copyright 1989-1991 The University of Maryland  
©copyright 1988 Carnegie Mellon University  
Tr a d em a r k Notices UNIX is a registered trademark of The Open  
Group.  
X Window System is a trademark of the Massachusetts Institute of  
Technology.  
MS-DOS and Microsoft are U.S. registered trademarks of Microsoft  
Corporation.  
OSF/Motif is a trademark of the Open Software Foundation, Inc. in the  
U.S. and other countries.  
3
 
4
 
The PCI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Auto Termination Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29  
General Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41  
The SCSI Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43  
A. SCSI Sen se Cod es  
B. Regu la tor y In for m a tion  
Regulatory Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68  
5
 
IEC Statement (Worldwide) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68  
Spécification ATI Classe A (France . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69  
VCCI Statement (Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69  
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70  
Glossa r y  
6
 
1
HP A5150A Ad a p ter Over view  
This chapter contains the following sections that describe the  
HP A5150A PCI Dual Port Ultra2 SCSI host bus adapter (HBA):  
About the A5150A Adapter” on page 9.  
Chapter 1  
7
 
 
HPA5150A Adapter Overview  
Features” on page 10.  
Interface Descriptions” on page 11.  
Supported HP 9000 and HP e3000 Servers” on page 13.  
Cable Specifications” on page 14.  
8
Chapter 1  
 
HPA5150A Adapter Overview  
About the A5150A Adapter  
Abou t th e A5150A Ad a p ter  
The A5150A Dual Channel PCI Ultra2 SCSI host adapter board provides  
two SCSI-3 Ultra2 SCSI interfaces to PCI computer systems that require  
BIOS support on the add-in SCSI adapter. Installing this adapter in your  
PCI system allows connection of SCSI devices over a SCSI bus.  
The dual channel A5150A board provides 16-bit Low Voltage Differential  
using only one PCI slot. This board supports legacy Fast SCSI devices,  
Ultra SCSI devices, and the newest Ultra2 SCSI devices.  
Consult with your Hewlett-Packard representative for more information  
on specific system configurations.  
Figure 1-1 below is a drawing of the A5150A adapter.  
Figu r e 1-1  
Th e A5150A P CI Ultr a 2 SCSI Host Bu s Ad a p ter  
Channel A  
68-pin internal  
High Density (HD)  
SCSI interface  
J5  
Channel B  
68-pin internal  
High Density (HD)  
SCSI interface  
J4  
Channel B  
68-pin external  
Very High Density  
Cable Interconnect  
(VHDCI) SCSI  
interface  
J3  
Channel A  
68-pin external  
J1 to PCI  
Bus Connector  
Very High Density  
Cable Interconnect  
(VHDCI) SCSI  
interface  
J2  
Chapter 1  
9
 
       
HPA5150A Adapter Overview  
Features  
Fea tu r es  
The A5150A adapter has the following features:  
PCI interface  
Full 32-bit or 64-bit (33 MHz) Direct Memory Access (DMA) bus  
master.  
— Zero wait-state bus master data bursts.  
PCI Universal 3.3V/5V bus support.  
SCSI interface  
— Two separate SCSI ports.  
— 16-bit single-ended (SE)/Low Voltage Differential (LVD)  
— Automatically enabled termination.  
— 68-pin Very High Density Cable Interconnect (VHDCI) connector  
for each of the two external channels.  
— 68-pin High Density connector for each of the two internal  
channels.  
— Fast, Ultra, and Ultra2 data transfer capability.  
— SCSI TERMPWR source with auto-resetting current-limiting  
device and TERMPWR shorted LED for each channel (not visible  
externally).  
— SCSI Plug and Play.  
Flash EEPROM for BIOS storage.  
— Serial non-volatile random access memory (NVRAM) on each  
channel, for user configuration utility and SCAM information  
storage.  
— SCSI activity LED for each channel (not visible externally).  
Board characteristics  
PCI board dimensions: approximately 9.5 inches x 4.0 inches.  
Universal 64-bit PCI card edge connector.  
— ISA/EISA bracket.  
10  
Chapter 1  
 
   
HPA5150A Adapter Overview  
Interface Descriptions  
In ter fa ce Descr ip tion s  
This section provides greater detail about the PCI, SCSI, and Wide  
Ultra2 SCSI interfaces.  
Th e P CI In ter fa ce  
PCI is a high-speed standard local bus for interfacing a number of I/O  
components to a processor and memory subsystem. The PCI  
The adapter connects directly to the PCI bus and generates timing  
protocol in compliance with the PCI application.  
The PCI interface operates as a 32-bit or 64-bit DMA bus master. The  
connection is made through the edge connector J 1 (see Figure 1-1 on  
page 9). The signal definitions and pin numbers conform to the PCI Local  
Bus Specification Revision 2.1 standard. The A5150A conforms to the  
PCI universal signaling environment for a 5 volt or 3.3 volt PCI bus.  
Th e SCSI In ter fa ce  
The SCSI functionality for the A5150A is contained within the PCI-SCSI  
I/O Processor Chip. The adapter connects directly to the two SCSI buses  
for 16-bit SE or LVD SCSI applications and generates timing and  
protocol in compliance with the SCSI standard. Each SCSI interface  
operates at a burst transfer rate of up to 40 MBytes per second for wide  
single-ended transfers, and up to 80 MBytes per second for wide LVD  
SCSI transfers.  
The two SCSI interfaces on the host bus adapter card operate as 16-bit,  
synchronous or asynchronous, single-ended or LVD, and support Ultra2  
SCSI protocols and 16-bit arbitration. The interface is made through  
connectors J 2 and J 5 for channel A and J 3 and J 4 for channel B.  
Connectors J 2 and J 3 are 68-pin, VHDCI right- angle receptacles that  
protrude through the ISA/EISA bracket.  
The adapter supplies SCSI bus TERMPWR (termination power) through  
a blocking diode and auto-resetting current-limiting device. Each SCSI  
channel has two LEDs to indicate the terminators power (TERMPWR)  
status. The TERMPWR Good (Channel A or B) LED indicates when the  
termination power is above 3.0 volts. The TERMPWR Shorted LED  
Chapter 1  
11  
 
       
HPA5150A Adapter Overview  
Interface Descriptions  
indicates when the termination power was subjected to an over current  
condition causing the self-resetting current limiting device (circuit  
breaker) to trip.  
A 40 MHz oscillator is installed on the A5150A card to provide the clock  
frequency necessary to support Wide Ultra2 SCSI transfers of up to 80  
MBytes per second.  
Th e Wid e Ultr a 2 SCSI In ter fa ce  
The adapter card has full support for Wide Ultra2 SCSI. This interface is  
an extension of the SCSI-3 family of standards that expands the  
bandwidth of the SCSI bus to allow faster synchronous data transfers,  
up to 80 MBytes per second. Wide Ultra2 SCSI provides a doubling of the  
data rate over the Ultra2 SCSI interface, increases the possible cable  
Ultra2 SCSI interfaces.  
Special SCSI cables are specified for operation with Wide Ultra and  
Ultra2 SCSI devices. You must consider the total number of devices and  
the length of your SCSI bus when setting up your system. The section  
Connecting the SCSI Peripherals” on page 27 provides a more detailed  
explanation of SCSI bus connections.  
12  
Chapter 1  
 
 
HPA5150A Adapter Overview  
Supported HP 9000 and HP e3000 Servers  
Su p p or ted HP 9000 a n d HP e3000 Ser ver s  
Table 1-1 below shows the HP 9000 and HP e3000 servers the A5150A  
adapter is supported in.  
Ta ble 1-1  
A5150A Su p p or ted HP 9000 a n d HP e3000 Ser ver s  
HP 9000 Ser ver  
HP -UX Op er a tin g  
System  
MP E/iX Op er a tin g  
System  
L-Class  
N-Class  
11.0 (or greater) and  
11i  
11.0 (or greater)  
and 11i  
7.0 and later  
Note that the maximum number of SCSI HBAs you can install in any  
HP 9000 or HP e3000 server is equal to the maximum number of  
corresponding card slots in the server. For example, if you are installing  
SCSI PCI HBAs and the server has four PCI card slots, you can install  
four SCSI PCI HBAs in that server.  
Chapter 1  
13  
 
     
HPA5150A Adapter Overview  
Cable Specifications  
Ca ble Sp ecifica tion s  
The A5150A adapter supports Low Voltage Differential (LVD) or  
single-ended (SE) connections.  
Table 1-2 below shows the cables to use when connecting external SCSI  
peripheral devices to the A5150A adapter.  
Ta ble 1-2  
Ca bles for Con n ectin g Exter n a l SCSI Devices to th e A5150A  
Ad a p ter  
Descr ip tion  
P r od u ct  
Nu m ber  
Op tion  
1-meter 68-pin VHDCI to 68-pin HD  
SCSI cable  
A3401A  
A3401A  
A3401A  
A3401A  
811  
812  
813  
814  
2.5-meter 68-pin VHDCI to 68-pin HD  
SCSI cable  
5-meter 68-pin VHDCI to 68-pin HD  
SCSI cable  
10-meter 68-pin VHDCI to 68-pin HD  
SCSI cable  
14  
Chapter 1  
 
     
2
In sta llin g th e A5150A Ad a p ter  
This chapter contains the following sections that describe how to install  
the A5150A adapter:  
Preparing for Installation” on page 17.  
Chapter 2  
15  
 
 
Installing the A5150A Adapter  
Looking at Adapter Installation” on page 19.  
Connecting the SCSI Peripherals” on page 27.  
SCSI Bus Termination” on page 29.  
“Verifying Installation” on page 37.  
NOTE  
This manual provides installation instructions and technical information  
for qualified personnel who maintain or service HP 9000 servers.  
Installing the adapter requires proficiency in both hardware  
configuration and software administration.  
16  
Chapter 2  
 
Installing the A5150A Adapter  
Preparing for Installation  
P r ep a r in g for In sta lla tion  
Installing the host bus adapter requires disassembly of some server  
components. Before beginning installation, refer to the system server  
manual for detailed instructions on installing host bus adapters in the  
PCI slots.  
You will need the following things:  
One HP A5150A SCSI adapter.  
One grounding (ESD) strap.  
Any other tools needed for installing components in the HP 9000  
system (for example, screwdrivers); see the systems documentation.  
Chapter 2  
17  
 
   
Installing the A5150A Adapter  
Handling the A5150A Adapter  
Ha n d lin g th e A5150A Ad a p ter  
The host bus adapter is packaged with an ESD kit, which contains  
materials to prevent damage from static electricity during installation.  
CAUTION  
The adapter is highly susceptible to damage by electrostatic discharge  
during installation and routine maintenance procedures. Do not handle  
circuit boards without wearing a wrist strap fastened to a good earth  
ground or to the system chassis.  
While you are installing the A5150A adapter, please follow these  
precautions:  
Keep the adapter in its shielded antistatic bag until you are ready to  
install it.  
Use a wrist strap or other ESD protection. Wrap the strap around  
your wrist and attach the copper end to a metal portion of the  
computer frame.  
Avoid working in carpeted areas.  
Gently place the adapter, printed circuit board (PCB) side down, on  
an antistatic work surface pad.  
Hold the adapter only by its sides or cover plate. Do not touch any  
components on the printed circuit board assembly (PCBA).  
Do not use any test equipment to check the components on the PCB.  
Do not bump, jar, or drop the adapter. Do not place other objects on  
top of the adapter.  
Transport the adapter in its shielded bag in an appropriate shipping  
container. Do not put other materials in the bag with the adapter.  
18  
Chapter 2  
 
   
Installing the A5150A Adapter  
Looking at Adapter Installation  
Look in g a t Ad a p ter In sta lla tion  
Installation can be performed in one of two ways:  
Use the OLAR (On Line Add/Replace) capability (HP-UX 11i). Refer  
to Install Using OLAR (HP-UX 11i)” on page 20.  
Power down the system and then add or replace the HBA. Refer to  
Install/Replace With System Powered Down” on page 25.  
The method you choose will depend on your situation, the card you are  
installing, and your requirements.  
Befor e You Sta r t  
Look through the task list below to get an overall idea of the steps to  
perform.  
1. Determine whether or not you can use the OLA/R (On Line Addition  
[and] Replacement) method to install the HBA (see Install Using  
OLAR (HP-UX 11i)” on page 20).  
2. Remove the SPU/system cabinet cover on the system to access the  
PCI slots. Refer to the system server manual for accessing PCI slots.  
3. Insert the host bus adapter.  
4. Connect the SCSI peripherals.  
5. Terminate the external SCSI bus.  
6. Set the peripheral SCSI IDs.  
7. Make any configuration changes.  
8. Replace the SPU/system cabinet cover.  
The SCSI host bus adapter acts on the servers behalf as the host to the  
suite of SCSI peripherals. Each chain of SCSI peripheral devices and  
their host bus adapter work together and are referred to as a SCSI bus.  
Each channel on your SCSI host bus adapter can act as host for up to 15  
peripheral devices (depending on the SCSI bus speed), not including the  
adapter itself.  
Chapter 2  
19  
 
     
Installing the A5150A Adapter  
Looking at Adapter Installation  
NOTE  
The host bus adapter card is supported on the HP N4000 N-class system.  
Refer to the Hewlett-Packard eproducts web site  
adapter in an available PCI slot, and reassemble the system.  
In sta ll Usin g OLAR (HP -UX 11i)  
The letters O, L, A and R stand for On Line Addition [and] Replacement.  
This refers to the ability of a PCI I/O card to be installed (replaced or  
added) in an HP-UX computer system designed to support this feature  
without the need for completely shutting down, then re-booting the  
system or adversely affecting other system components. The system  
hardware uses the per-slot power control combined with operating  
system support in HP-UX 11i to enable this feature.  
IMPORTANT  
Certain Classes” of hardware are not intended for access by users. At  
this time this includes V-Class and SuperDome systems. HP  
recommends that these systems only be opened by a qualified HP  
Engineer. Failure to observe this requirement can invalidate any support  
agreement or warranty to which the owner might otherwise be entitled.  
Im p or ta n t Ter m s a n d Con cep ts  
The addition or replacement of an OLAR-compatible card may be done in  
either one of two ways:  
1. Using the SAM utility.  
2. Issuing command-line commands using rad.  
For detailed information about the use of either of these two procedures,  
please refer to the following document:  
Configuring HP-UX For Peripherals, HP Part Number B2355-90698  
This document may be ordered from HP, or you may view, download and  
print it from the following website: www.docs.hp.com  
20  
Chapter 2  
 
   
Installing the A5150A Adapter  
Looking at Adapter Installation  
Ta ble 2-1  
Im p or ta n t Ter m s  
Ter m  
Mea n in g  
OLAR  
All aspects of the OLAR feature  
including On-line Addition  
(OLA) and On-line Replacement  
(OLR).  
Power Domain  
A grouping of 1 or more  
interface card slots that can be  
powered on or off as a unit.  
(NOTE: Multi-slot power  
domains are not currently  
supported)  
target card / target card slot  
The interface card which will be  
added or replaced using OLAR,  
and the card slot in which it  
resides.  
affected card / affected card  
slot  
Interface cards and the card  
slots in which they reside, and  
which are in the same power  
domain as the target slot.  
IMPORTANT  
In many cases, other interface cards and slots within the system are  
dependent upon the target card. For example:  
If the target card is a multiple-port card, suspending or deleting drivers  
for the target card slot also suspends individual drivers for the multiple  
hardware paths on that card).  
During a card replacement operation, SAM performs a Critical Resource  
Analysis, which checks all ports on the target card for critical resources  
that would be temporarily unavailable while the card is shut down.  
Chapter 2  
21  
 
Installing the A5150A Adapter  
Looking at Adapter Installation  
P la n n in g a n d P r ep a r a tion  
SAM will, generally, prevent you from performing OLAR procedures that  
would adversely affect other areas of the server. Refer to Configuring  
HP-UX For Peripherals, HP Part Number B2355-90698 for detailed  
information.  
Cr itica l Resou r ces Because power to the slot must be off when the old  
card is removed and the new card is inserted, the effects of shutting  
down the cards functions must be carefully considered.  
This is particularly important if there is no on-line failover or backup  
card to pick up those functions. For example:  
Which mass storage devices will be temporarily disconnected when  
the card is shut down?  
Will a critical networking connection be lost?  
A critical resource is one that would cause a system crash or prevent the  
operation from successfully completing if the resource were temporarily  
suspended or disconnected. For example, if the SCSI adapter to be  
replaced connects to the unmirrored root disk or swap space, the system  
will crash when the card is shut down.  
During an OLAR procedure, it is essential to check the targeted card for  
critical resources, as well as the effects of existing disk mirrors and other  
situations where a cards functions can be taken over by another card  
that will not be affected.  
Fortunately SAM performs a thorough critical resource analysis  
automatically, and presents options to you based on its findings. If you  
determine that critical resources will be affected by the procedure, you  
should replace the card when the server is off-line.  
If you must take action immediately, you can use radto attempt an  
on-line addition of a backup card and deletion of the target card.  
Ca r d Com p a tibility  
On -Lin e Ad d ition (OLA). When on-line adding an interface card, the  
first issue that must be resolved is whether the new card is compatible  
with the system. Each PCI slot provides a set amount of power. The  
replacement card cannot require more power than is available.  
The card must also operate at the slots bus frequency. A PCI card must  
run at any frequency lower than its maximum capability; however, a  
22  
Chapter 2  
 
Installing the A5150A Adapter  
Looking at Adapter Installation  
card that operated at a maximum of 33 MHz would not work on a bus  
running at 66 MHz. radprovides information about the bus frequency  
and power available at a slot, as well as other slot-related data.  
On -Lin e Rep la cem en t (OLR) When on-line replacing an interface  
card, the replacement card must be identical to the card being replaced  
or at least be able to operate using the same driver as the replaced card.  
This is referred to as like-for-like replacement and should be adhered to  
because using a similar but not identical card may cause unpredictable  
results. For example, a newer version of the target card which is  
identical in terms of hardware may contain an updated firmware version  
that could potentially conflict with the current driver.  
The PCI specification allows a single physical card to contain more than  
one port. A single-port SCSI bus adapter can not be replaced by a  
dual-port adapter, even if the additional port(s) on the card are identical  
to the original SCSI bus adapter.  
When the replacement card is added to the system, the appropriate  
driver for that card must be configured in the kernel before beginning  
the operation. SAM ensures the correct driver is present. (In most cases,  
the replacement card will be the same type as a card already in the  
system, and this requirement will be automatically met.) If you have any  
question about the drivers presence, or if you are not certain that the  
replacement card is identical to the existing card, you can use ioscan  
together with radto investigate.  
If the necessary driver is not present and the driver is a dynamically  
loadable kernel module (DLKM), you can load it manually. Refer to  
the section Dynamically Loadable Kernel Modules” in Chapter 2 of  
the document: Configuring HP-UX For Peripherals, HP Part Number  
B2355-90698 for more information.  
If the driver is static and not configured in the kernel, then the card  
cannot be On-line Added. The card could be physically inserted  
on-line, but no driver would claim it.  
Chapter 2  
23  
 
Installing the A5150A Adapter  
Looking at Adapter Installation  
OLA/R Restr iction s for th e A5150A  
Currently there are two versions of the A5150A:  
A5150-60001 (older)  
A5150-60101 (newer)  
Both of the HBAs have some restrictions in the OLA/R procedure. These  
restrictions are explained below.  
Generally, the restrictions are necessary because the SCSI attributes of  
initiator ID, speed, and auto termination cannot be changed online for  
this HBA.  
OLA of A5150-60001 This HBA can be online added only if the SCSI  
attribute values of initiator IDand speedare usable in your  
configuration. These values will be set to the current PDC (Processor  
Dependent Code) values (if any) or default to the new HBA’s values (see  
Table 2-2).  
Ta ble 2-2  
A5150-60001 - Defa u lt SCSI Attr ibu te Va lu es  
Attr ibu te  
Defa u lt Va lu e  
Initiator ID  
Speed  
7
Ultra2  
Auto Termination  
A5150-60001 Enabled or  
Jumper Controlled  
(HP would prefer that you not  
use the jumper settings)  
A5150-60101 Enabled  
If these attributes are not acceptable, you must reboot the system to  
access the Boot Console Handler (BCH) prompt and then change the  
values in the PDC.  
OLA of A5150-60101 This HBA cannotbe online added.  
24  
Chapter 2  
 
 
Installing the A5150A Adapter  
Looking at Adapter Installation  
OLR of A5150-60001 The online replacement operation preserves the  
initiator ID and speed settings across the replacement. The auto  
termination setting for this HBA is over-ridden by the jumper settings on  
the board.  
Before installation, ensure that the auto termination jumpers are set to  
the same position as they were on the replaced HBA.  
Besides the cautions noted above, the A5150-60001 can be Online  
Replaced without special considerations. See the Configuring HP-UX  
Peripherals manual for the steps that are necessary to OLR this HBA.  
OLR of A5150-60101 the A5150-60101 can be Online Replaced with  
one special consideration.  
The HBA being replaced MUSThave been running with auto termination  
enabled.  
If the above condition is met, you may OLR the HBA. See the  
Configuring HP-UX Peripherals manual for the steps that are necessary  
to OLR this HBA.  
NOTE  
Until you complete the OLR, additional SCSI error messages might be  
written to the /var/adm/syslog.logfile. Do not be concerned about  
these messages; they do not affect the result of the OLR process.  
In sta ll/Rep la ce With System Pow er ed Dow n  
Check the manual supplied with the server to perform the following  
installation:  
Step 1. Shut down the operating system.  
Step 2. Power off the system and unplug power cords for all components in the  
server.  
Step 3. Locate the PCI slots for your server. Remove any cabinet cover.  
Chapter 2  
25  
 
   
Installing the A5150A Adapter  
Looking at Adapter Installation  
CAUTION  
The adapter is highly susceptible to damage by electrostatic discharge  
during installation and routine maintenance. Do not handle circuit  
boards without wearing a wrist strap fastened to a good earth ground or  
to the system chassis.  
NOTE  
A 32-bit slot will work; however, full performance requires a 64-bit slot.  
Refer to the documentation for your server to confirm the location of the  
PCI slots. The A5150A host bus adapter requires a PCI slot that allows  
bus master operation.  
Step 4. Remove the blank panel aligned with the PCI slot you intend to use. If  
the blank panel has a bracket screw, save it for reuse during the  
installation.  
Before proceeding to the next step, ground yourself to prevent the  
possibility of electrostatic discharge damaging the board.  
Step 5. Remove the A5150A Dual Channel PCI to Ultra2 SCSI host bus adapter  
from its packing and check that it is not damaged.  
Step 6. Carefully insert the edge connector J 1 (see Figure 1-1 on page 9) of the  
host bus adapter into the PCI slot. Make sure the edge connector is  
properly engaged before pressing the board into place.  
NOTE  
You may notice that the components on a PCI host adapter face the  
opposite way from those on other non-PCI adapter boards you have in  
your system. This is correct, and the board is keyed to go in only one way.  
Step 7. The cards bracket (with connectors J 2 and J 3) should fit where the blank  
panel was removed. Secure the bracket with the bracket screw from the  
blank panel, if there is one.  
NOTE  
For N-Class systems, a screw is not used to secure the card.  
26  
Chapter 2  
 
Installing the A5150A Adapter  
Connecting the SCSI Peripherals  
Con n ectin g th e SCSI Per ip h er a ls  
All external SCSI bus connections to the A5150A host bus adapter are  
made with shielded, 68-conductor cables. The connectors on this cable  
are always keyed to ensure proper mating.  
Some internal cables come with 16bit SE/LVD on one end. This end  
should be farthest from the host bus adapter.  
Figu r e 2-1  
SCSI Ca ble  
SCSI Cable for External Connections  
68-pin VHDCI  
HD SCSI  
VHDCI SCSI  
Ma k in g Exter n a l SCSI Bu s Con n ection s  
Step 1. To connect external SCSI devices to the A5150A host bus adapter, plug  
the 68-pin VHDCI connector on one end of a shielded external high  
density SCSI cable into the host bus adapter connector J 2 or J 3.  
This connector is now bracketed onto the back panel of the system.  
Step 2. Plug the 68-pin connector on the other end of the shielded external SCSI  
cable into the SCSI connector on your external SCSI device.  
Chapter 2  
27  
 
     
Installing the A5150A Adapter  
Connecting the SCSI Peripherals  
Step 3. If you need to connect more than one external SCSI device to your host  
bus adapter, chain them together with shielded external SCSI cables.  
If auto termination has been disabled and you wish to terminate an  
external connector on the HBA, use HP product number A5296A, VHDCI  
LVD/SE terminator.  
Ma k in g In ter n a l SCSI Bu s Con n ection s  
Step 1. Identify pin 1 on adapter connector J 4 or J 5 (internal 68-pin SCSI  
connector). Pin 1 of the connector is typically marked by the number 1 or  
a small triangle.  
Step 2. Identify pin 1 on either end of a 68-pin SCSI ribbon cable. Pin 1 is  
typically marked with a contrasting color on the pin-1 end of the cable  
connector (for example, red).  
internal adapter connector (J 4 or J 5). Connector the other end of the  
cable to the SCSI connector on the internal peripheral device.  
Step 4. If you need to connect more than one internal SCSI device to your host  
bus adapter, you can chain them together (connect them serially).  
Step 5. Refer to SCSI Bus Termination” on page 29 for information on  
termination.  
If auto termination has been disabled and you wish to terminate an  
internal connector on the HBA, use HP product number C2370A, SCSI  
LVD/SE VHDTS68 terminator.  
28  
Chapter 2  
 
 
Installing the A5150A Adapter  
SCSI Bus Termination  
SCSI Bu s Ter m in a tion  
The devices that make up the SCSI bus are connected serially (chained  
together) with SCSI cables. The first and last physical SCSI devices  
connected on the ends of the SCSI bus must have a set of resistors called  
terminators. All other SCSI devices on the bus must have their  
terminators removed or disabled.  
NOTE  
The A5150A host bus adapter is also on the SCSI bus. Termination of the  
host bus adapter is automatically enabled when it is connected to the end  
of the bus.  
Low-voltage differential peripheral devices are usually terminated with  
external terminators; however, they are sometimes terminated with  
jumpers or with a switch on the peripheral. Refer to the peripheral  
device manual to identify the termination setting of each device and how  
to change it.  
Au to Ter m in a tion In for m a tion  
Two versions of the A5150A SCSI PCI Host Bus Adapter (HBA) will be in  
the field beginning approximately January 2001, with the release of a  
new version of the HBA. The older HBA has part number A5150-60001  
and the new HBA has part number A5150-60101. The new HBA (also  
known as the jumperless A5150A) does not contain pins and jumpers  
used for manually configuring auto termination. On the jumperless  
A5150A, the default power-on setting has auto termination enabled. If  
you have the older adapter (A5150-60001), do not change the position of  
Hewlett-Packard (open - not jumpered). Auto termination in both  
A5150A HBAs—the A5150-60001 and the A5150-60101—is now  
controlled through commands at the Boot Console Handler (BCH)  
prompt. To use the auto termination feature of both A5150A HBAs, you  
must have the correct version of the Processor Dependent Code (PDC) on  
your system. The correct PDC versions are shown in Table 2-3.  
Chapter 2  
29  
 
     
Installing the A5150A Adapter  
SCSI Bus Termination  
Ta ble 2-3  
Au to Ter m in a tion P DC Ver sion s  
HP 9000 System  
P DC Ver sion  
A400 and A500  
L-Class  
40.20 or later  
39.40 or later  
39.41 or later  
N-Class  
The A5150A is supported on the A400, A500, L-Class, and N-Class  
HP 9000 systems.  
Bu s Ter m in a tion  
The SCSI bus must be properly terminated. The first and last physical  
SCSI devices on the ends of the SCSI bus must be terminated either by  
physical terminators or auto termination. The terminators of all other  
SCSI devices on the bus must be removed or disabled. Note that the  
A5150A HBA is also on the bus. However, because the A5150A HBA  
HBA are not usually required. (Terminators are not shipped with the  
A5150A; you can order them separately, if needed.) The A5150A provides  
automatic termination when a SCSI cable from a powered SCSI device (a  
peripheral or other HBA) is connected to either the internal or external  
connector of the A5150A. Some exceptions where external terminators  
are required are described in When and How to Turn Off Auto  
Termination” on page 31.  
The older A5150A HBA (A5150-60001) has two sets of pins that control  
enabling and disabling (defeating) the auto termination feature. The  
pins—labeled A_TERM and B_TERM—are at the end of the HBA that is  
opposite the bulkhead connectors. A_TERM controls the auto  
termination feature for channel A, and B_TERM controls the feature for  
channel B.  
NOTE  
The A5150A’s auto termination feature cannot be set independently for  
the internal and external connectors of the HBA.  
30  
Chapter 2  
 
   
Installing the A5150A Adapter  
SCSI Bus Termination  
In the factory default configuration of the older A5150-60001 HBA, the  
pin sets are normally open (not shorted together by the jumper). In the  
open state, the A5150A automatically senses whether a cable from a  
powered SCSI device is attached, and automatically provides the proper  
termination (depending on whether a powered device is present or no  
powered device is present).  
The HBA senses the presence of connections to powered devices by  
detecting the ground signal on pin 50 of the SCSI cable.  
If the HBA detects the ground signal on pin 50 of only the internal or  
only the external connector, then termination is automatically  
applied on the HBA.  
If the HBA detects the ground signal on pin 50 of both the internal  
and external connectors, termination is automatically removed at the  
HBA.  
If an A5150A with the auto termination feature enabled is connected  
to another device that uses the same method of auto-sensing (for  
example, another HBA), the auto termination feature will not work  
properly. In this case, disable the auto termination feature, as  
described in When and How to Turn Off Auto Termination” on  
page 31.  
Even though the A5150A provides automatic termination, the opposite  
end of the SCSI bus must still be properly terminated. If you need an  
external terminator for connecting directly to the A5150A HBA, the  
appropriate terminator is HP product number A5296A, VHDCI LVD/SE  
terminator.” If you need an additional terminator for connecting to a  
peripheral on the end of the SCSI bus, order the appropriate terminator  
needed to attach to the peripheral. See the peripherals documentation  
for additional information.  
Wh en a n d How to Tu r n Off Au to Ter m in a tion  
Information about when and how you turn off auto termination for the  
A5150A is given below.  
Wh en To Tu r n Off Au to Ter m in a tion  
Some sample scenarios for when you must turn off auto termination are  
described below. Note that the internal connectors of the HBA are not  
usually used in any of the HP 9000 servers. So, these scenarios assume  
that nothing is connected to the internal connectors.  
Chapter 2  
31  
 
   
Installing the A5150A Adapter  
SCSI Bus Termination  
If peripheral devices are connected to the external connector and the  
HBA is at the end of the SCSI bus, you must terminate the last device on  
the bus. Termination is also required on the HBA. If you have not  
disabled the auto termination feature of the HBA as described in How to  
Turn Off Auto Termination” on page 33, termination is automatically  
applied on the HBA.  
Scenario Two  
If peripheral devices are connected to the external connector, and you  
have disabled the auto termination feature of the HBA by moving the  
jumpers to the position that shorts both pins of the pin sets together, you  
must put a separate terminator on the HBA. You can do this by  
connecting a terminator to the unused internal connector of the HBA, or  
by connecting an inline-terminated cable to the HBA.  
NOTE  
This is true only if the HBA is at the end of the SCSI bus, and not in the  
Scenario Three  
If no devices are connected to the external connector and you have  
disabled auto termination as described in How to Turn Off Auto  
Termination” on page 33, you must put a separate terminator on the  
external connector of the HBA. Be sure to use the proper type of  
terminator (LVD/SE for the A5150A).  
Scenario Four  
If peripheral devices are connected to the external connector via a  
V-cable and the HBA is in the middle of the SCSI bus, you must  
terminate the last device on the bus. In this configuration, auto  
termination of the bus.  
Scenario Five  
If the HBA is connected to another HBA in a multi-initiator or High  
Availability configuration, you must disable the auto termination feature  
as described in How to Turn Off Auto Termination” on page 33.  
Scenario Six  
32  
Chapter 2  
 
Installing the A5150A Adapter  
SCSI Bus Termination  
The HBA is not able to distinguish inline-terminated cables from regular  
SCSI cables. If an inline-terminated cable is connected to an HBA that  
has auto termination enabled, termination will be provided by both the  
cable and the HBA. This would result in improper (double) termination  
of the SCSI bus. To prevent this, disable auto termination any time  
inline-terminated cables are connected to the HBA.  
Scenario Seven  
V-Class systems use cables with inline termination. So, the jumpers of  
any HBAs installed in a V-Class system are set to disable auto  
termination when they are shipped from Hewlett-Packard.  
Scenario Eight  
High Availability configurations use inline-terminated cables exclusively,  
so you must disable auto termination on any HBAs used in an HA  
environment.  
How to Tu r n Off Au to Ter m in a tion  
You control the auto termination feature through commands at the BCH  
prompt. See the steps below.  
NOTE  
The following steps and examples are specific to N-Class systems.  
Menus, commands, and responses will be slightly different on other  
systems.  
To change the auto termination state of an A5150A HBA, follow these  
steps:  
Chapter 2  
33  
 
 
Installing the A5150A Adapter  
SCSI Bus Termination  
Step 1. Check the PDC version, by booting the system to the BCH prompt and  
then doing the following:  
a. At the Main Menu, type in(for Information Menu).  
b. At the Information Menu, type fv(to display the firmware version).  
FIRMWARE INFORMATION  
Firmware Version:  
39.41  
Table 2-3, earlier in this document, shows the required PDC versions for  
using auto termination on each HP 9000 system. If you do not have a  
correct PDC version on your system, contact your HP support  
representative.  
Step 2. Determine the HBA’s path by doing the following:  
a. If already at the Main Menu, type in(for Information Menu); go to  
step b.  
If not already at the Main Menu, type main(to return to the Main  
Menu), type in(for Information Menu), then go to step b.  
b. At the Information Menu, type io(to display I/O interface  
information). The output could look like this:  
PCI DEVICE INFORMATION  
Path  
(dec)  
-------  
Vendor Device Bus  
Slot  
#
----  
Description  
----------------  
ID  
ID  
#
------  
-------  
-----  
.
.
SCSI bus cntrl  
0/2/0/0  
0x1000  
0xb  
16  
6
In this example, the HBA’s path is 0/2/0/0 (shown in bold, for emphasis,  
in the listing above).  
Step 3. Change the HBA’s auto termination state by doing the following:  
a. If already at the Main Menu, type ser(for Service Menu); go to stepb.  
If not already at the Main Menu, type main(to return to the Main  
Menu), type ser(for Service Menu), then go to step b.  
34  
Chapter 2  
 
 
Installing the A5150A Adapter  
SCSI Bus Termination  
b. In the Service Menu, type scsi(to display the current status of SCSI  
devices). The output could look like this:  
Path (dec)  
Initiator ID SCSI Rate Auto Term  
-------------  
------------  
------------  
------------  
.
.
0/2/0/0  
7
Fast  
Off  
In this example, the HBA’s auto termination state is Off (shown in  
bold, for emphasis, in the listing above).  
c. Still in the Service Menu, type the following command:  
scsi term path state  
where path is the HBA’s path and state is what you want to set  
the HBA’s auto termination state to. So, using the information for  
the HBA in the two examples above, you would type  
scsi term 0/2/0/0 on  
to change the HBA’s auto termination state to on.  
If you want to be sure the auto termination state changed, you can  
repeat step b to display the SCSI device status.  
Settin g SCSI IDs  
You must set each SCSI device and the host adapter to a separate SCSI  
ID (0 through 15 for a 16-bit SCSI). SCSI ID 7 is the preset host adapter  
setting, giving it the highest priority on the SCSI bus. If you plan to boot  
your computer from a hard disk drive on the SCSI bus, that drive should  
be set to SCSI ID 6 or the lowest SCSI ID on the bus.  
To change this default to a different SCSI address for HA applications,  
you must use the Boot Console Handler or BCH for N-4000 systems.  
There are no SCSI address switches or jumpers. You must invoke the  
appropriate commands in the SCSI section of the BCH and change the  
address electronically to whatever is required for the HA configuration  
being used. Refer to Checking SCSI Bus Compatibility” on page 42 for  
more information.  
Chapter 2  
35  
 
   
Installing the A5150A Adapter  
SCSI Bus Termination  
The peripheral device SCSI IDs are usually set with jumpers or a switch  
on the peripheral. Refer to the peripheral manufacturers instructions to  
determine the ID of each device and how to change it (via BCH for  
N-Class systems). You must have no duplication of SCSI IDs on a SCSI  
bus.  
Step 1. Determine the SCSI ID required for each device on the SCSI bus.  
Step 2. Make any necessary changes to the SCSI IDs and record the IDs for  
future reference. You may use the following table.  
Ta ble 2-4  
Recor d of SCSI IDs  
SCSI ID  
SCSI Device Ch a n n el A SCSI Device Ch a n n el B  
15  
14  
13  
12  
11  
10  
9
8
7
Adapter (default)  
Adapter (default)  
6
5
4
3
2
1
0
36  
Chapter 2  
 
Installing the A5150A Adapter  
Verifying Installation  
Ver ifyin g In sta lla tion  
After installing the adapter and attaching peripheral devices, verify that  
all components are working. Refer to your system documentation for  
information on verifying operation.  
HP 9000  
Step 1. To verify that the adapter is correctly installed, execute the following  
command:  
ioscan -f  
The ioscanoutput could look like this:  
ext_bus 0 0/0/0 c720 CLAIMED INTERFACE Ultra 2 wide SCSI  
The third column represents the hardware path of the slot the adapter is  
installed in. For information about the ioscancommand, refer to your  
operating system reference manual or the ioscanman page.  
Step 2. Verify that the adapter and driver display.  
Step 3. Verify that the devices you attached to the adapter display.  
Chapter 2  
37  
 
   
Installing the A5150A Adapter  
Verifying Installation  
HP e3000  
Assume an N-Class system with an I/O card being added to slot #12, we  
will expect paths 1/0/0/0 and 1/0/0/1 to be returned for our card.  
Step 1. From BCH menus:  
------------------------------------------------------  
-Command  
-------  
ALL  
Description  
-----------  
Display all system information  
...  
IO  
Display I/O interface information  
...  
--------------------------------------------------  
Information Menu: Enter command > io  
I/O MODULE INFORMATION  
Path Slot  
IODC  
Type  
----  
(dec) Number  
----- ------  
0
HVERSION SVERSION Vers  
-------- -------- ----  
System bus adapter  
Local bus adapter  
Local bus adapter  
...  
0x8030  
0xc10  
0xa00  
0x0  
0x0  
0/0  
Built_In 0x7820  
Local bus adapter  
...  
1/0  
12  
0x7820  
0xa00  
0x0  
PCI DEVICE INFORMATION  
Path  
Vendor Device Bus Slot  
Description  
-----------  
(dec)  
-----  
Id  
----  
Id  
#
#
---- --- ---  
Ethernet cntlr  
SCSI bus cntlr  
SCSI bus cntlr  
SCSI bus cntlr  
Comp. ser cntlr  
Comp. ser cntlr  
SCSI bus cntlr  
SCSI bus cntlr  
0/0/0/0  
0/0/1/0  
0/0/2/0  
0/0/2/1  
0/0/4/0  
0/0/5/0  
1/0/0/0  
1/0/0/1  
0x1011 0x19  
0x1000 0xc  
0x1000 0xf  
0x1000 0xf  
0x103c 0x1048 0  
0x103c 0x1048 0  
0
0
0
0
Built_In  
Built_In  
Built_In  
Built_In  
Built_In  
Built_In  
0x1000 0xf  
0x1000 0xb  
128 12  
128 12  
Information Menu: Enter command >main  
Main Menu: Enter command or menu > sea 1/0/0/0  
Searching for potential boot device(s) - on Path 1/0/0/0  
This may take several minutes.  
To discontinue search, press any key (termination may not be immediate).  
Path# Device Path (dec) Device Path (mnem) Device Type  
----- ----------------- ------------------ -----------  
P0  
1/0/0/0.6  
intscsia.6  
Random access media  
Main Menu: Enter command or menu >  
38  
Chapter 2  
 
3
Tr ou blesh ootin g  
The A5150A adapter is a single field-replaceable unit (FRU) and does not  
contain any field-serviceable parts. Troubleshooting procedures  
described in this chapter are limited to verifying that the adapter is  
operational and that a valid connection is established.  
Chapter 3  
39  
 
 
Troubleshooting  
General Procedure” on page 41.  
Checking SCSI Bus Compatibility” on page 42.  
Using Support Tools Manager (STM)” on page 47.  
Contacting Your Hewlett-Packard Representative” on page 48.  
40  
Chapter 3  
 
Troubleshooting  
General Procedure  
Gen er a l P r oced u r e  
The A5150A adapter is a single field-replaceable unit (FRU) and does not  
contain any field-serviceable parts. Troubleshooting procedures  
described in this section are limited to verifying that the adapter is  
operational and a valid connection is established.  
In general, follow these steps to troubleshoot the A5150A adapter:  
Step 1. Check the connection.  
Make sure that the correct cable is used, connected, and operating  
properly and that there are no bent pins in any of the connectors.  
Step 2. Check SCSI bus compatibility.  
Ensure transfer rate compatibility with the attached devices using the  
SCSI boot menu command.  
Step 3. Check the adapter.  
Inspect the adapter to make sure it is seated properly in the PCI bus slot.  
If necessary, power down the system, reseat the adapter, and restart the  
system.  
Step 4. Run diagnostics.  
If a visual inspection of the adapter and cable does not reveal any  
problems, or if an action taken as a result of the inspection does not  
produce a working adapter, you may want to run diagnostics to  
determine whether the adapter can communicate and respond to PCI  
bus instructions. Diagnostics are described in the next section.  
If diagnostics determine that the adapter is defective, you must replace  
it. Contact your local Hewlett-Packard customer representative or call  
the HP Response Center.  
Chapter 3  
41  
 
   
Troubleshooting  
Checking SCSI Bus Compatibility  
Ch eck in g SCSI Bu s Com p a tibility  
You can ensure SCSI controller and SCSI device compatibility by using  
the SCSIcommand to display and select SCSI bus parameters.  
The SCSIcommand is available from the boot menu displayed after the  
test station has booted (if autoboot is disabled). The boot menu looks like  
this (for highlighting reasons, the SCSIcommand is in bold here):  
Command  
-------  
Description  
-----------  
AUto [BOot|SEArch ON|OFF]  
BOot [PRI|ALT|<path> <args>]  
BootTimer [time]  
CLEARPIM  
Display or set the specified flag  
Boot from a specified path  
Display or set boot delay time  
Clear PIM storage  
CPUconfig [<proc>] [ON|OFF]  
DEfault  
DIsplay  
Configure/Deconfigure Processor  
Set the sytem to defined values  
Display this menu  
ForthMode  
IO  
LS [<path>|flash]  
OS [hpux|sppux]  
PASSword  
Switch to the Forth OBP interface  
List the I/O devices in the system  
List the boot or flash volume  
Display/Select Operating System  
Set the Forth password  
PAth [PRI|ALT|CON] [<path>]  
PDT [CLEAR|DEBUG]  
Display or modify a path  
Display/clear Non-Volatile PDT state  
PIM_info [cpu#] [HPMC|TOC|LPMC] Display PIM of current or any CPU  
RESET [hard|debug]  
RESTrict [ON|OFF]  
Force a reset of the system  
Display/Select restricted access to Forth  
SCSI [INIT|RATE] [bus slot val] List/Set SCSI controller parms  
SEArch [<path>]  
SECure [ON|OFF]  
TIme [cn:yr:mo:dy:hr:mn[:ss]]  
VErsion  
Search for boot devices  
Display or set secure boot mode  
Display or set the real-time clock  
Display the firmware versions  
42  
Chapter 3  
 
   
Troubleshooting  
Checking SCSI Bus Compatibility  
Th e SCSI Com m a n d  
As explained above, you can use the SCSIcommand to check the  
compatibility of the SCSI adapter and the SCSI device(s), by displaying  
and setting SCSI bus parameters.  
Disp la yin g Tr a n sfer Ra tes  
To use the SCSIcommand to display the SCSI transfer rate for an  
adapter, follow this syntax:  
SCSI rate bus_number slot_number  
where  
bus_number  
Specifies the number of the bus the adapter is installed  
on.  
slot_number Specifies the number of the slot the adapter is in.  
For example:  
To display the SCSI transfer rate for the adapter installed on bus 5  
slot 2, issue this command:  
SCSI rate 5 2  
The output could look something like this:  
PCI device /5.2 = no limit  
To list transfer rates for all bus and slot numbers, issue this  
command:  
SCSI rate  
Chapter 3  
43  
 
 
Troubleshooting  
Checking SCSI Bus Compatibility  
Settin g Tr a n sfer Ra tes  
To use the SCSIcommand to set the SCSI transfer rate for an adapter,  
follow this syntax:  
SCSI rate bus_number slot_number rate  
where  
bus_number  
Specifies the number of the bus the adapter is installed  
on.  
slot_number Specifies the number of the slot the adapter is in.  
rate  
Specifies the adapters transfer rate:  
0(no limit)  
10(Fast SCSI)  
20(Ultra SCSI)  
For example, to set the SCSI transfer rate for the adapter installed on  
bus 5 slot 2 to Fast SCSI and then display the results, issue these  
commands:  
SCSI rate 5 2 10  
SCSI rate 5 2  
The output (of the second command) could look something like this:  
PCI device /5.2 = fast SCSI  
44  
Chapter 3  
 
Troubleshooting  
Checking SCSI Bus Compatibility  
Disp la yin g SCSI IDs  
To use the SCSIcommand to display the initiator (SCSI) IDs for an  
adapter, follow this syntax:  
SCSI init bus_number slot_number  
where  
bus_number  
Specifies the number of the bus the adapter is installed  
on.  
slot_number Specifies the number of the slot the adapter is in.  
For example:  
To display the SCSI ID for the adapter on bus 5 slot 2, issue this  
command:  
SCSI init 5 2  
The output could look something like this:  
PCI device /5.2 = 7  
To list the SCSI IDs for all bus and slot numbers, issue this command:  
SCSI init  
Chapter 3  
45  
 
Troubleshooting  
Checking SCSI Bus Compatibility  
Settin g SCSI IDs  
To use the SCSIcommand to set the initiator (SCSI) ID for an adapter,  
follow this syntax:  
SCSI init bus_number slot_number ID_number  
where  
bus_number  
Specifies the number of the bus the adapter is installed  
on.  
slot_number Specifies the number of the slot the adapter is in.  
ID_num Specifies the adapters SCSI ID number.  
For example, to set the SCSI ID for the adapter installed on bus 5 slot 2  
to 6 and then display the results, issue these commands:  
SCSI init 5 2 6  
SCSI init 5 2  
The output (of the second command) could look something like this:  
PCI device /5.2 = 6  
46  
Chapter 3  
 
Troubleshooting  
Using Support Tools Manager (STM)  
Usin g Su p p or t Tools Ma n a ger (STM)  
STM is a software application that can be run from the console to obtain  
status and descriptive information about the A5150A adapter, diagnose  
problems, and update firmware. See the Support Tools Manager Users  
Guide for more details about STM.  
Chapter 3  
47  
 
   
Troubleshooting  
Contacting Your Hewlett-Packard Representative  
Con ta ctin g You r Hew lett-Pa ck a r d  
Rep r esen ta tive  
If the equipment is covered by an HP service contract, document the  
problem as a service request and forward it to your HP representative.  
Include the following information where applicable:  
Describe the problem, including the events and symptoms leading up  
to the problem. Attempt to describe the source of the problem.  
Include commands, communication subsystem commands,  
functionality of user programs, result codes and messages, and data  
that can reproduce the problem.  
Obtain the version, update, and fix information for all software.  
1. To check the version of the kernel, enter this command:  
uname -r  
To check patches, enter:  
what /stand/vmunix | grep scsi  
2. To check the version of MPE/iX enter: SHOWME  
To check patches, enter: PRINT HPSWINFO.PUB.SYS  
This allows HP to determine if the problem is already known and the  
correct software is installed at your site.  
Illustrate as clearly as possible the context of any messages. Record  
all error messages and numbers that appear at the user terminal and  
the system console.  
Prepare the formatted output and a copy of the log file for the HP  
representative to analyze.  
Prepare a listing of the HP-UX or MPE/iX I/O configuration being  
used for the HP representative to analyze.  
Try to determine the general area within the software where the  
problem may exist. Refer to the appropriate reference manual and  
follow the guidelines on gathering information for that product.  
Document your interim (workaround) solution. The cause of the  
problem can sometimes be found by comparing the circumstances in  
48  
Chapter 3  
 
   
Troubleshooting  
Contacting Your Hewlett-Packard Representative  
which the problem occurs with the circumstances in which the  
problem does not occur.  
In the event of a system failure, obtain a full memory dump.  
For HP-UX: If the directory /var/adm/crashexists, the HP-UX  
utility /sbin/savecoreautomatically executes during reboot to save  
the memory dump. HP recommends that you create the  
/tmp/syscoredirectory after successfully installing this product.  
Send the output of the system failure memory dump to the HP  
representative.  
For MPE/iX: If you use AUTORESTART and DUMPTODISK  
products follow your normal system recovery steps. Otherwise take a  
memory dump and save the resulting tape. Contact HP Support for  
analysis of your failure.  
If the equipment is not covered by an HP service contract, there may be a  
charge for time and materials.  
Chapter 3  
49  
 
Troubleshooting  
Contacting Your Hewlett-Packard Representative  
50  
Chapter 3  
 
A
SCSI Sen se Cod es  
This appendix shows the possible codes that appear in SCSI error  
messages.  
Appendix A  
51  
 
 
SCSI Sense Codes  
The following example shows a typical SCSI error message:  
[+6708 72410001 002a9858 0:7] scsi disk: CHECK CONDITION on disk 0:6:5:0  
Read of logical block 509856, count 128  
disk sd45a, block 254920, 65536 bytes  
Valid = 1, Error code = 0x70  
Segment number = 0x00, Filemark = 0, EOM = 0, ILI = 0  
Sense key = 0x1, "RECOVERED ERROR"  
Information = 0x00 0x07 0xc7 0xe4  
[+6709 72410001 002a9a10 0:7] scsi disk:  
Additional sense length = 0x0a  
Command-specific information = 0x00 0x00 0x00 0x00  
Additional sense = 0x18, Qualifier = 0x01  
Field replaceable unit code = 0xea  
SKSV = 1, C/D = 0, BPV = 0, Bit pointer = 0  
Field pointer = 0x0003  
The status (CHECK CONDITION) and sense key (RECOVERED  
ERROR)—shown in bold in the example above—are interpreted for you  
in the error message text. Each Additional sense and its corresponding  
Qualifier code—shown in bold in the example above—require  
interpretation on your part. Use the two codes together to determine the  
meaning. In the example above, the Additional sense (0x18) and  
Qualifier (0x01) codes together mean recovered data with error  
correction and retries applied.” You can look up the various codes and  
keys in the tables on the next pages.  
52  
Appendix A  
 
SCSI Sense Codes  
Table A-1 below lists all possible SCSI status codes and their meanings.  
Ta ble A-1  
SCSI Sta tu s Cod es  
SCSI  
Sta tu s  
Cod e  
Mea n in g  
0x00  
0x02  
0x04  
0x08  
0x10  
0x14  
Good  
Check condition  
Condition met  
Busy  
Intermediate  
Intermediate—condition  
met  
0x18  
0x22  
0x28  
Reservation conflict  
Command terminated  
Queue full  
Appendix A  
53  
 
 
SCSI Sense Codes  
Table A-2 below lists all possible SCSI sense keys and their meanings.  
Ta ble A-2  
SCSI Sen se Keys  
SCSI  
Sen se  
Key  
Mea n in g  
0
No sense  
0x1  
0x2  
0x3  
0x4  
0x5  
0x6  
0x7  
0x8  
0x9  
0xa  
0xb  
0xc  
0xd  
0xe  
0xf  
Recovered error  
Not ready  
Medium error  
Hardware error  
Illegal request  
Unit attention  
Data protect  
Blank check  
Vendor-specific  
Copy aborted  
Aborted command  
Equal  
Volume overflow  
Miscompare  
Reserved  
54  
Appendix A  
 
 
SCSI Sense Codes  
Table A-3 below lists the Additional sense codes and Qualifier codes and  
their meanings. Remember that you must use the combined codes—an  
Additional sense code/Qualifier code pair—to find the correct meaning.  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x00  
0x00  
0x01  
0x02  
0x03  
0x04  
0x05  
0x06  
0x11  
0x12  
0x13  
No additional sense information  
Filemark detected  
End-of-partitions/medium detected  
Setmark detected  
Beginning of partition/medium detected  
End-of-data detected  
I/O process terminated  
Audio play operation in progress  
Audio play operation paused  
Audio play operation successfully  
completed  
0x14  
Audio play operation stopped due to  
error  
0x15  
0x00  
0x00  
0x00  
0x01  
0x02  
No current audio status to return  
No index/sector signal  
No seek complete  
0x01  
0x02  
0x03  
Peripheral device write fault  
No write current  
Excessive write errors  
Appendix A  
55  
 
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x04  
0x00  
Logical unit not ready, cause not  
reportable  
0x01  
0x02  
Logical unit in process of becoming ready  
Logical unit not ready, initializing  
command required  
0x03  
Logical unit not ready, manual  
intervention required  
0x04  
0x00  
0x00  
0x00  
0x00  
0x01  
0x02  
0x00  
0x01  
0x02  
0x03  
0x00  
0x00  
0x01  
Logical unit not ready, format in progress  
Logical unit does not respond to selection  
Reference position found  
0x05  
0x06  
0x07  
0x08  
Multiple peripheral devices selected  
Logical unit communication failure  
Logical unit communication time-out  
Logical unit communication parity error  
Track following error  
0x09  
Tracking servo failure  
Focus servo failure  
Spindle servo failure  
0x0a  
0x0c  
Error log overflow  
Write error  
Write error recovered with auto  
reallocation  
0x02  
Write error—auto reallocation failed  
56  
Appendix A  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x10  
0x11  
0x00  
0x00  
0x01  
0x02  
0x03  
0x04  
ID crc or ecc error  
Unrecovered read error  
Read retries exhausted  
Error too long to correct  
Multiple read errors  
Unrecovered read error—auto reallocate  
failed  
0x05  
0x06  
0x07  
0x08  
0x09  
0x0a  
0x0b  
l-ec uncorrectable error  
circ unrecovered error  
Data resynchronization error  
Incomplete block read  
No gap found  
Miscorrected error  
Unrecovered read error—recommend  
reassignment  
0x0c  
Unrecovered read error—recommend  
rewrite the data  
0x12  
0x13  
0x00  
0x00  
Address mark not found for ID field  
Address mark not found for data field  
Appendix A  
57  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x14  
0x00  
0x01  
0x02  
0x03  
0x04  
0x00  
0x01  
0x02  
Recorded entity not found  
Record not found  
Filemark or setmark not found  
End-of-data not found  
Block sequence error  
0x15  
Random positioning error  
Mechanical positioning error  
Positioning error detected by read of  
medium  
0x16  
0x17  
0x00  
0x00  
Data synchronization mark error  
Recovered data with no error correction  
applied  
0x01  
0x02  
0x03  
0x04  
Recovered data with retries  
Recovered data with positive head offset  
Recovered data with negative head offset  
Recovered data with retries and/or circ  
applied  
0x05  
0x06  
Recovered data using previous sector ID  
Recovered data without ecc—data  
auto-reallocated  
0x07  
0x08  
Recovered data without ecc—recommend  
reassignment  
Recovered data without ecc—recommend  
rewrite  
58  
Appendix A  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x18  
0x00  
0x01  
Recovered data with error correction  
applied  
Recovered data with error correction and  
retries applied  
0x02  
0x03  
0x04  
0x05  
Recovered data—data auto-reallocated  
Recovered data with circ  
Recovered data with lec  
Recovered data—recommend  
reassignment  
0x06  
0x00  
0x01  
0x02  
0x03  
0x00  
0x00  
0x00  
0x01  
0x02  
0x00  
0x00  
0x00  
Recovered data—recommend rewrite  
Defect list error  
0x19  
Defect list not available  
Defect list error in primary list  
Defect list error in grown list  
Parameter list length error  
Synchronous data transfer error  
Defect list not found  
0x1a  
0x1b  
0x1c  
Primary defect list not found  
Grown defect list not found  
Miscompare during verify operation  
Recovered ID with ecc  
0x1d  
0x1e  
0x20  
Invalid command operation code  
Appendix A  
59  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x21  
0x00  
0x01  
0x00  
0x00  
0x00  
0x00  
0x01  
0x02  
0x03  
0x00  
0x00  
Logical block address out of range  
Invalid element address  
Illegal function  
0x22  
0x24  
0x25  
0x26  
Invalid field in cdb  
Logical unit not supported  
Invalid field in parameter list  
Parameter not supported  
Parameter value invalid  
Threshold parameters not supported  
Write protected  
0x27  
0x28  
Not ready to ready transition (medium  
may have changed)  
0x01  
0x00  
Import or export element assessed  
0x29  
0x2a  
Power on, reset, or bus device reset  
occurred  
0x00  
0x01  
0x02  
0x00  
Parameters changed  
Mode parameters changed  
Log parameters changed  
0x2b  
0x2c  
Copy cannot execute since host cannot  
disconnect  
0x00  
0x01  
Command sequence error  
Too many windows specified  
60  
Appendix A  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x2f  
0x30  
0x00  
0x00  
0x01  
0x02  
Commands cleared by another initiator  
Incompatible medium installed  
Cannot read medium—unknown format  
Cannot read medium—incompatible  
format  
0x03  
0x00  
0x00  
0x01  
0x00  
0x00  
0x00  
0x00  
0x00  
Cleaning cartridge installed  
Medium format corrupted  
No defect spare location available  
Defect list update failure  
Tape length error  
0x31  
0x32  
0x33  
0x36  
0x37  
0x39  
0x3a  
Ribbon, ink, or tower failure  
Rounded parameter  
Saving parameters not supported  
Medium not present  
Appendix A  
61  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x3b  
0x00  
0x01  
Sequential positioning error  
Tape position error at  
beginning-of-medium  
0x02  
0x03  
Tape position error at end-of-medium  
Tape or electronic vertical forms unit not  
ready  
0x04  
0x05  
0x06  
0x07  
0x08  
0x09  
0x0a  
0x0b  
0x0c  
0x0d  
0x0e  
0x00  
0x00  
Slew failure  
Paper jam  
Failed to sense top-of-form  
Failed to sense bottom-of-form  
Reposition error  
Read past end of medium  
Read past beginning of medium  
Position past end of medium  
Position past beginning of medium  
Medium destination element full  
Medium source element empty  
Invalid bits in identify message  
Logical unit has not self-configured yet  
0x3d  
0x3e  
62  
Appendix A  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x3f  
0x00  
Target operation conditions have  
changed  
0x01  
0x02  
0x03  
0x00  
nn  
Microcode has been changed  
Changed operating definition  
Inquiry data has changed  
RAM failure  
0x40  
Diagnostic failure on component nn  
Data path failure  
0x41  
0x42  
0x43  
0x44  
0x45  
0x46  
0x47  
0x48  
0x49  
0x4a  
0x4b  
0x4c  
0x4e  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
Power-on or self-test failure  
Message error  
Internal target failure  
Select or reselect failure  
Unsuccessful soft reset  
SCSI parity error  
Initiator detected error message received  
Invalid message error  
Command phase error  
Data phase error  
Logical unit failed self-configuration  
Overlapped commands attempted  
Appendix A  
63  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x50  
0x00  
0x01  
0x02  
0x00  
0x00  
0x00  
0x01  
0x02  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
Write append error  
Write append position error  
Position error related to timing  
Erase failure  
0x51  
0x52  
0x53  
Cartridge fault  
Media load or eject failed  
Unload tape failure  
Medium removal prevented  
SCSI to host system interface failure  
System resource failure  
Reserved  
0x54  
0x55  
0x56  
0x57  
0x58  
0x59  
0x5A  
Unable to recover table of contents  
Generation does not exist  
Updated block read  
Operator request or state change input  
(unspecified)  
0x01  
0x02  
0x02  
Operator medium removal request  
Operator selected write protect  
Operator selected write permit  
64  
Appendix A  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x5B  
0x00  
0x01  
0x02  
0x03  
0x00  
0x01  
0x02  
0x00  
0x00  
0x00  
0x00  
0x00  
0x01  
0x02  
0x00  
0x00  
Log exception  
Threshold condition met  
Log counter at maximum  
Log list codes exhausted  
RPL status change  
Spindles synchronized  
Spindles not synchronized  
Reserved  
0x5C  
0x5D  
0x5E  
0x5F  
0x60  
0x61  
Reserved  
Reserved  
Lamp failure  
Video acquisition error  
Unable to acquire video  
Out of focus  
0x62  
0x63  
Scan head positioning error  
End of user area encountered on this  
track  
0x64  
0x65  
0x66  
0x67  
0x68  
0x00  
0x00  
0x00  
0x00  
0x00  
Illegal mode for this track  
Reserved  
Reserved  
Reserved  
Reserved  
Appendix A  
65  
 
SCSI Sense Codes  
Ta ble A-3  
SCSI Ad d ition a l Sen se Cod e/Qu a lifier Cod e Pa ir s (Con tin u ed )  
SCSI  
Ad d ition  
a l Sen se  
Cod e  
SCSI  
Qu a lifier  
Cod e  
Mea n in g  
0x69  
0x6A  
0x6B  
0x6C  
0x6D  
0x6E  
0x6F  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
0x00  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
66  
Appendix A  
 
B
Regu la tor y In for m a tion  
This appendix contains all of the regulatory-related information for the  
A5150A adapter.  
Appendix B  
67  
 
 
Regulatory Information  
Regulatory Statements  
Regu la tor y Sta tem en ts  
This section contains all of the regulatory statements for the A5150A  
adapter.  
F CC Sta tem en t (For U.S.A. On ly)  
The Federal Communications Commission (in 47 CFR 15.105) has  
specified that the following notice be brought to the attention of the users  
of this product.  
This equipment has been tested and found to comply with the limits for a  
Class A digital device, pursuant to Part 15 of the FCC Rules. These  
limits are designed to provide reasonable protection against harmful  
interference when the equipment is operated in a commercial  
environment. This equipment generates, uses, and can radiate radio  
frequency energy and, if not installed and used in accordance with the  
instruction manual, may cause harmful interference to radio  
communications. Operation of this equipment in a residential area is  
likely to cause harmful interference in which case the user will be  
required to correct the interference at his own expense. The end user of  
this product should be aware that any changes or modifications made to  
this equipment without the approval of Hewlett-Packard could result in  
the product not meeting the Class A limits, in which case the FCC could  
void the user's authority to operate the equipment.  
IEC Sta tem en t (Wor ld w id e)  
This is a Class A product. In a domestic environment this product may  
cause radio interference in which case the user may be required to take  
adequate measures.  
DOC Sta tem en t (Ca n a d a )  
This Class A digital apparatus meets all requirements of the Canadian  
interference-Causing Equipment Regulations.  
Cet appareil numerique do la classe A respecte toutes les exigences du  
Reglement sur le materiel brouilleur du Canada.  
68  
Appendix B  
 
       
Regulatory Information  
Regulatory Statements  
Sp écifica tion ATI Cla sse A (Fr a n ce  
DECLARATION DINSTALLATION ET DE MISE EN EXPLOITATION  
dun matériel de traitement de linformation (ATI), classé A en fonction  
des niveaux de perturbations radioélectriques émis, définis dans la  
norme européenne EN 55022 concernant la Compatibilité  
Electromagnétique.  
Cher Client,  
Conformément à la Réglementation Française en vigueur linstallation  
ou le transfert dinstallation, et lexploitation de cet appareil de classe A,  
doivent faire lobjet dune déclaration (en deux exemplaires)  
simultanément auprès des services suivants:  
Comité de Coordination des Télécommunications 20, avenue de Ségur  
- 75700 PARIS  
Préfecture du département du lieu dexploitation  
Le formulaire à utiliser est disponible auprès des préfectures.  
La déclaration doit être faite dans les 30 jours suivant la mise en  
exploitation.  
Le non respect de cette obligation peut être sanctionné par les peines  
prévues au code des Postes et Télécommunications et celles indiquées  
dans la loi du 31 mai 1993 susvisée.  
Arrêté du 27 Mars 1993, publié au J.O. du 28 Mars - ATI  
VCCI Sta tem en t (J a p a n )  
Appendix B  
69  
 
   
Regulatory Information  
Regulatory Statements  
Decla r a tion of Con for m ity  
70  
Appendix B  
 
 
Glossa r y  
microprocessor. This is the fastest  
way for multi-tasking operating  
systems to transfer data.  
A
a d d r ess A specific location in  
memory, designated either  
numerically or by a symbolic  
name.  
byte A unit of information  
consisting of eight bits.  
ch a in A topology in which every  
device is connected to two others,  
except for two-end devices that  
are connected to only one other.  
Asyn ch r on ou s Da ta Tr a n sfer  
One of the ways data is  
transferred over the SCSI bus. It  
is slower than synchronous data  
transfer.  
CISP R (Com m ittee,  
In ter n a tion a l a n d Sp ecia l, for  
P r otection in Ra d io) An  
international committee on radio  
frequency interference.  
BIOS (Ba sic In p u t/Ou tp u t  
System ) Software that provides  
basic read/write capability.  
Usually kept as firmware (ROM  
based). The system BIOS on the  
main board of a computer is used  
to boot and control the system.  
The SCSI BIOS on the host  
adapter acts as an extension of the  
system BIOS.  
con figu r a tion Refers to the way  
a computer is set up; the combined  
hardware components (computer,  
monitor, key board, and  
peripheral devices) that make up  
a computer system; or the  
software settings that allow the  
hardware components to  
communicate with each other.  
bit A binary digit. The smallest  
unit of information a computer  
uses. The value of a bit (0 or 1)  
represents a two-way choice, such  
as on or off, true or false.  
CP U (cen tr a l p r ocessin g u n it)  
The brain” of the computer that  
performs the actual computations.  
The term Micro Processor Unit  
(MPU) is also used.  
bu s A collection of wires in a cable  
or copper traces on a circuit board  
used to transmit data, status, and  
control signals. EISA, PCI, and  
SCSI are examples of buses.  
DMA (d ir ect m em or y a ccess) A  
method of moving data from a  
storage device directly to RAM,  
without using the CPUs  
resources.  
bu s m a ster in g A  
high-performance way to transfer  
data. The host adapter controls  
the transfer of data directly to and  
from system memory without  
bothering the computers  
DMA bu s m a ster A feature that  
allows a peripheral to control the  
71  
 
 
flow of data to and from system  
memory by blocks, as opposed to  
PIO (Programmed I/O) where the  
flow is byte by byte.  
F CC Federal Communications  
Commission.  
file A named collection of  
information, usually stored on a  
disk.  
d evice d r iver A program that  
allows a microprocessor (through  
the operating system) to direct the  
operation of a peripheral device.  
fir m w a r e Software that is  
permanently stored in ROM. In  
the case of BIOS, it can be accessed  
during boot time without the aid of  
an operating or file system.  
d iffer en tia l A hardware  
configuration for connecting SCSI  
devices. It uses a pair of lines for  
each signal transfer (as opposed to  
single-ended SCSI which  
references each SCSI signal to a  
common ground).  
h a r d d isk A rigid disk  
permanently sealed into a drive  
cartridge. A hard disk can store  
very large amounts of information.  
EEP ROM (electr on ica lly  
er a sa ble p r ogr a m m a ble  
r ea d -on ly m em or y) A memory  
chip typically used to store  
configuration information. See  
NVRAM.  
h ost The computer system in  
which a SCSI host adapter is  
installed. It uses the SCSI host  
adapter to transfer information to  
and from devices attached to the  
SCSI bus.  
EISA (Exten d ed In d u str y  
Sta n d a r d Ar ch itectu r e) An  
extension of the 16-bit ISA bus  
standard. It allows devices to  
perform 32-bit data transfers.  
h ost bu s a d a p ter (HBA) A  
circuit board and/or integrated  
circuit device that provides a SCSI  
bus connection to the computer  
system.  
exter n a l SCSI d evice A SCSI  
device installed outside the  
computer cabinet. External SCSI  
devices are connected in a chain  
using shielded cables.  
in ter n a l SCSI d evice A SCSI  
device installed inside the  
computer cabinet. These devices  
are connected in a chain using an  
unshielded ribbon cable.  
Fa st SCSI A standard for SCSI  
data transfers. It allows a transfer  
rate of up to 10 MBytes/sec over an  
8-bit SCSI bus, and up to 20  
IRQ (in ter r u p t r equ est  
ch a n n el) A path through which a  
device can get the immediate  
attention of the computers CPU.  
The PCI bus assigns an IRQ path  
MBytes/sec over a 16-bit SCSI bus.  
72  
 
for each SCSI host adapter.  
that holds RAM, ROM, the  
microprocessor, custom integrated  
circuits, and other components  
that make a computer work. It  
also has expansion slots for host  
adapters and other plug-in boards.  
ISA (In d u str y Sta n d a r d  
Ar ch itectu r e) A type of  
computer bus used in most PCs. It  
allows devices to send and receive  
data 16 bits at a time.  
m a in m em or y The part of a  
computers memory that is  
directly accessible by the CPU  
(usually synonymous with RAM).  
KByte (k ilobyte) A measure of  
computer storage equal to 1024  
bytes.  
loca l bu s A way to connect  
peripherals directly to the  
m oth er boa r d See mainboard. In  
some countries, the term  
computer processors data path. It  
bypasses the slower ISA and EISA  
buses. PCI is a local bus standard.  
motherboard is not appropriate.  
m u lti-ta sk in g The initiation and  
control of more than one sequence  
of operations. This allows  
logica l u n it A subdivision, either  
logical or physical, of a SCSI  
programs to operate in parallel.  
device. Most devices have only one  
logical unit, but up to sixteen are  
allowed for a 16-bit SCSI bus and  
eight for an 8-bit SCSI bus.  
m u lti-th r ea d in g The  
simultaneous accessing of data by  
more than one SCSI device. This  
increases the aggregate data  
throughput.  
LUN (logica l u n it n u m ber ) An  
encoded three-bit number for the  
logical unit.  
NVRAM (Non -Vola tile Ra n d om  
Access Mem or y) An EEPROM  
(Electronically Erasable Read  
Only Memory chip) used to store  
configuration information.  
LVD (low -volta ge d iffer en tia l)  
A robust design methodology that  
improves power consumption,  
data integrity, cable lengths, and  
support for multiple devices while  
providing a migration path for  
increased I/O performance.  
op er a tin g system A program  
that organizes the internal  
activities of the computer and its  
peripheral devices. An operating  
system performs basic tasks such  
as moving data to and from  
devices, and managing  
MByte (m ega byte) A measure of  
computer storage equal to 1024  
kilobytes.  
information in memory. It also  
provides the user interface.  
m a in boa r d A large circuit board  
73  
 
p a r ity ch eck in g A way to verify  
the accuracy of data transmitted  
over the SCSI bus. One bit in the  
transfer is used to make the sum of  
all the 1 bits either odd or even (for  
odd or even parity). If the sum is  
not correct, an error message  
p or t a d d r ess Also Port Number.  
The address through which  
commands are sent to a host  
adapter board. This address is  
assigned by the PCI bus.  
p or t n u m ber See port address.  
appears. SCSI uses odd parity.  
qu eu e ta gs A way to keep track of  
multiple commands while allowing  
increased throughput on the SCSI  
bus.  
P CI (p er ip h er a l com p on en t  
in ter con n ect) A local bus  
specification that allows  
connection of integrated peripheral  
controller components, peripheral  
add-in boards, and  
RAM (Ra n d om Access  
Mem or y) Generally, the  
processor/memory systems. It  
bypasses the slower ISA and EISA  
busses.  
computers primary working  
memory in which program  
instructions and data are stored  
and are accessible to the CPU.  
Information can be written to and  
read from RAM. The contents of  
RAM are lost when the computer is  
turned off.  
p er ip h er a l d evices A hardware  
device (such as a video monitor,  
disk drive, printer, or CD-ROM)  
used with a computer and under  
the computers control. SCSI  
peripherals are controlled through  
a SCSI host adapter.  
RISC cor e Symbios SCSI chips  
contain a RISC (Reduced  
Instruction Set Computer)  
processor, programmed through  
microcode scripts.  
p in -1 or ien ta tion The alignment  
of pin 1 on a SCSI cable connector  
and the pin 1 position on the SCSI  
connector into which it is inserted.  
External SCSI cables are keyed to  
ensure proper alignment, but  
internal SCSI ribbon cables may  
not be.  
ROM (Rea d -On ly Mem or y)  
Memory from which information  
can be read but not changed. The  
contents of ROM are not erased  
when the computer is turned off.  
P IO (p r ogr a m m ed  
SCAM (SCSI Con figu r ed  
Au toMa tica lly) A method to  
automatically allocate SCSI IDs  
via software when SCAM  
compliant SCSI devices are  
attached.  
in p u t/ou tp u t) A way the CPU can  
transfer data to and from memory  
via the computers I/O ports. PIO  
can be faster than DMA, but  
requires CPU time.  
74  
 
SCSI (sm a ll com p u ter system  
in ter fa ce) A specification for a  
high-performance peripheral bus  
and command set. The original  
standard is now referred to as  
SCSI-1.  
SDMS (SCSI Device  
Ma n a gem en t System ) A  
Symbios software product that  
manages SCSI system I/O.  
sin gle-en d ed SCSI A hardware  
specification for connecting SCSI  
devices. It references each SCSI  
signal to a common ground, as  
opposed to differential SCSI and  
low-voltage differential SCSI,  
which use a separate return for  
each signal.  
SCSI-2 The current SCSI  
specification that adds features to  
the original SCSI-1 standard.  
SCSI-3 The next SCSI  
specification, that adds features to  
the SCSI-2 standard.  
syn ch r on ou s d a ta tr a n sfer  
SCSI bu s A host adapter and one  
or more SCSI peripherals  
One of the ways data is  
transferred over the SCSI bus.  
Transfers are clocked with  
fixed-frequency pulses.  
connected by cables in a linear  
chain configuration. The host  
adapter may exist anywhere on  
the chain, allowing connection of  
both internal and external SCSI  
devices. A system may have more  
than one SCSI bus by using  
multiple host adapters.  
System BIOS Controls the low  
level POST (Power On Self Test)  
and basic operation of the CPU  
and computer system.  
ter m in a tion The electrical  
connection required at each end of  
the SCSI bus, composed of a set of  
resistors.  
SCSI d evice Any device  
conforming to the SCSI standard  
that attaches to the SCSI bus by  
means of a SCSI cable. This  
includes SCSI host adapters and  
SCSI peripherals.  
Ultr a SCSI A standard for SCSI  
data transfers. It allows a transfer  
rate of up to 20 MBytes/sec over  
an 8-bit SCSI bus, and up to 40  
MBytes/sec over a 16-bit SCSI  
bus. STA (SCSI Trade  
Association) supports using the  
term Ultra SCSI” over the older  
term Fast-20.”  
SCSI ID A unique identification  
for each SCSI device on the SCSI  
bus. Each SCSI bus has fifteen  
available SCSI IDs numbered 0  
through 15 for Wide SCSI or 0-7  
for 8-bit SCSI. The host adapter is  
assigned ID 7, which gives it  
priority to control the bus.  
Ultr a 2 SCSI A standard for SCSI  
data transfers. It allows a transfer  
75  
 
rate of up to 40 MBytes/sec over an  
8-bit SCSI bus, and up to 80  
MBytes/sec over a 16-bit SCSI bus.  
STA (SCSI Trade Association)  
supports using the term Ultra2  
SCSI” over the older term  
Fast-40.”  
VCCI Voluntary Control Council  
for Interference.  
VHDCI Very High Density Cable  
Interconnect.  
Wid e SCSI A SCSI-2 feature  
allowing 16 or 32-bit transfers on  
the SCSI bus. This dramatically  
increases the transfer rate over the  
standard 8-bit SCSI bus.  
Wid e Ultr a SCSI The SCSI Trade  
Association term for SCSI bus  
width 16 bits, SCSI bus speed  
maximum data rate 40  
MBytes/sec.  
Wid e Ultr a 2 SCSI The SCSI  
Trade Association term for SCSI  
bus width 16 bits, SCSI bus speed  
maximum data rate 80  
MBytes/sec.  
76  
 

Gravely Lawn Mower Accessory 890015 User Manual
Grizzly Saw G0716 User Manual
GT Bicycle STREET MACHINE User Manual
Hearth and Home Technologies Indoor Fireplace WHB30 User Manual
Honeywell Automobile Parts W7751H User Manual
Honeywell Security Camera HZC 855NX User Manual
Honeywell Stud Sensor N4300 User Manual
Hotpoint Refrigerator FF4DK User Manual
Hotpoint Ventilation Hood HT9X User Manual
Husqvarna Chainsaw T540 XP User Manual