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Currently an user is running a pureScale cluster, when all of the SAN disks(including the disk where instance path is on) were corrupted, he has to do the following to recovery the cluster:
1) replacing the corrupted disks
2) re-install and setup the pureScale environment from zero
3) restore the databases from backups
The above steps, especially for step 2) is time taken, we need a feature like Oracle OCR, so the user can backup the instance facilities and settings, such as the gpfs definitions and settings, TSA/RSCT definition and settings, Db2 settings, in file level or similar level, so then disks were corrupted, s/he can replace the corrupted disks, and then restore the pureScale instance from the backup, without re-installing the pureScale from the start.
An alternative is that IBM to fully test the following way and ensure it can work without any problem:
1. replacing the corrupted disks
2. Recover the GPFS file systems:
2.1 Recreate the file systems and the NSDs by GPFS mm* commands. Note the name of the file system and NSDs must be exactly the same with what they were originally. 2.2 If PR was used then re-setup PR.
3. Recovery the pureScale instance by restoring the files from file level backup
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