Compex Systems Advanced SerialRAID Adapters SA33-3285-02 - Manual (Page 238)

Dealing with Fast-Write Problems
This section describes how to recover from problems that might occur during fast-write
operations. The type of problems are those in which data loss might have occurred or
customer data recovery procedures need to be performed. These problems are
indicated by any of the following Service Request Numbers (SRNs):
v 42521
v 42524
v 42525
If any of these SRNs occurs, do the following actions:
1. Go to “Service Request Numbers (SRNs)” on page 411, and find the SRN.
2. Do the actions that are given for the SRN, and come to this section when the
actions tell you to do so.
Important: Do not come to this section until the SRN actions tell you to do
so.
3. Find the SRN in this section, and do the actions given.
SRN 42521
You can use the ssaraid command to list the devices that are affected by this failure.
The ssaraid command is in /usr/sbin.
v To list all devices that are affected by this cache failure, type:
ssaraid -l ssaX -Iz -a state=cache_data_error
where X is the number of the adapter that has reported the failure in the error log; for
example, ssa3. The output from the command produces one line of information for
each device, as follows:
2327340C228635K 2327340C228635K cache_data_error 9.1GB RAID-5 array
hdisk3 2327340C423235K cache_data_error 36.4GB RAID-5 array
pdisk5 08005AEA045E00D free n/a 9.1GB Physical disk
For non-RAID disk drives, the pdisk is listed with the pdisk state. No array resource
state exists.
For RAID arrays, the hdisk is listed with the array resource state.
The location of the corrupted data is not known, and no simple data recovery
procedure is possible. To attempt data recovery, you must disable the fast-write
cache, then make the devices available again.
218 User’s Guide and Maintenance Information
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