IBM xSeries 260, User Manual

Page: 199 / 312

/etc/lpp/diagnostics/data/spconfig
SCSI Bus Analyzer
This service aid provides a means to diagnose a SCSI Bus problem in a free-lance
mode.
To use this service aid, the user should have an understanding of how a SCSI Bus
works. This service aid should be used when the diagnostics cannot communicate
with anything on the SCSI Bus and cannot isolate the problem. Normally the
procedure for finding a problem on the SCSI Bus with this service aid is to start with
a single device attached, ensure that it is working, then start adding additional
devices and cables to the bus ensuring that each one works. This service aid works
with any valid SCSI Bus configuration.
The SCSI Bus Service Aid transmits a SCSI Inquiry command to a selectable SCSI
Address. The service aid then waits for a response. If no response is received
within a defined amount of time, the service aid displays a timeout message. If an
error occurs or a response is received, the service aid then displays one of the
following messages:
Ÿ
The service aid transmitted a SCSI Inquiry Command and received a valid
response back without any errors being detected.
Ÿ
The service aid transmitted a SCSI Inquiry Command and did not receive any
response or error status back.
Ÿ
The service aid transmitted a SCSI Inquiry Command and the adapter indicated
a SCSI bus error.
Ÿ
The service aid transmitted a SCSI Inquiry Command and an adapter error
occurred.
Ÿ
The service aid transmitted a SCSI Inquiry Command and a check condition
occur.
When the SCSI Bus Service Aid is entered a description of the service aid is
displayed.
Pressing the Enter key displays the Adapter Selection menu. This menu allows the
user to enter which address to transmit the SCSI Inquiry Command.
When the adapter is selected the SCSI Bus Address Selection menu is displayed.
This menu allows the user to enter which address to transmit the SCSI Inquiry
Command.
Chapter 6. Introduction to Diagnostic Tasks and Service Aids
6-33