IBM Advanced SerialRAID Adapters SA33-3285-02, User Manual

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v
Change the state of the Split Array Resolution flag on the new adapters.
Attention: This method helps you to recover the system from severe errors. Use
this method only if the other half of the array has failed completely, and will never be
used again.
Array is Offline because the Split and Join Procedure Was Not Performed
Correctly
When this condition occurs, the host system generates SRN 48760.
The condition can be caused if a RAID-1 or a RAID-10 array has been split exactly in
half, and a separate write operation has been performed to each half of the array.
This problem can occur in a dual-host configuration if:
v
Only one adapter can be detected on the SSA loop, you change the state of the Split
Array Resolution flag, and a separate write operation is performed to each half of the
array.
v
Both adapters can be detected on the SSA loop, but one half of the RAID array
cannot be detected, and the following sequence of events occurs:
1. A write operation is performed.
2. The half of the array that could originally be detected can no longer be detected.
3. The half of the array that could not originally be detected can now be detected,
and data is written to it.
4. The half of the array that could originally be detected can now be detected again.
The problem can also occur in a single-host system if only one half of the RAID array
can be detected, and the following sequence of events occurs:
1. A write operation is performed.
2. The half of the array that could not originally be detected can now be detected.
3. The half of the array that could originally be detected can no longer be detected,
and data is written to it.
4. The half of the array that could originally be detected can now be detected again.
Chapter 8. Split-Site Management
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