Originally posted by: mikeysky
I've always unmapped to fix issues with reserve lock. I can see where it would work without unmapping if the LPAR was down. To avoid the downtime, a new disk with reserve lock set correctly can be used to swap out the one with issues.
1. Get new or used disk(s) on both VIO servers.
2. Set reserve lock = "no" on both VIO servers for the new disk(s).
3. Map to client LPAR with reserve lock issues.
4. Extend the volume group with the bad disk to the new good disk.
5. Use migratepv to free up the bad disk.
6. Run reducevg and rmdev to remove the old disk
7. Unmap the old disk.
8. If the disk being replaced is a rootvg disk, relink /dev/ipldevice and run bosboot.
This is labor intensive, but fixes the problem without downtime.
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