Compex Systems Advanced SerialRAID Adapters SA33-3285-02 - Manual (Page 461)

Software and Microcode Errors
Some SRNs indicate that a problem might have been caused by a software error or by
a microcode error. If you have one of these SRNs, do the following actions:
1. Make a note of the contents of the error log for the device that has the problem.
2. For AIX Versions 4.2 and above, run the snap -b command to collect system
configuration data, and to dump data.
For AIX versions below 4.2, go to the using-system service aids and select Display
Vital Product Data to display the VPD of the failing system. Make a note of the
VPD for all the SSA adapters and disk drives.
3. Report the problem to your support center. The center can tell you whether you
have a known problem, and can, if necessary, provide you with a correction for the
software or microcode.
If the support center has no known correction for the SRN, exchange, for new
FRUs, the FRUs that are listed in the SRN.
SSA Loop Configurations that Are Not Valid
Note: This section is related to SRN 48000.
SRN 48000 shows that the SSA loop contains more devices or adapters than are
allowed. The maximum numbers allowed depend on the adapter; “Rules for SSA Loops”
on page 22 describes these details for each adapter.
If the SRN occurred when you, or the customer, switched on the using system:
1. Switch off the using system.
2. Review the configuration that you are trying to make, and determine why that
configuration is not valid.
3. Correct your configuration by reconfiguring the SSA cables or by removing the
excess devices or adapters from the loop.
4. Switch on the using system.
Service Hint: Cables can easily become crossed. If you still have problems,
disconnect all the cables from the SSA adapter, then reconnect them
one at a time. For each cable that you reconnect, run the Link
Verification service aid (see “Link Verification Service Aid” on page 383)
to check whether the configuration is as you expect.
If the SRN occurred because additional devices or adapters were added to a working
SSA loop:
1. Remove the additional devices or adapters that are causing the problem, and put
the loop back into its original, working configuration.
Note: It is important that you do these actions, because they enable the
configuration code to reset itself from the effects of the error.
Chapter 18. SSA Problem Determination Procedures 441