Short version: I suspect some of my array components may be corrupt, and
wonder what the best way is to check for it and fix it.
I have a VM configued similarly to my real machine for testing.
When I brought it up there were some complaints about the arrays and
needing to resync them. While the sync appeared to complete
successfully, the VM was quite unstable afterwards, as it had not been
before.
The VM was most likely shut down abruptly when the real machine had a
power failure. Also, I had added a 3rd disk to my RAID-1 arrays since I
last booted the VM, but my mdadm.conf had -num-devices=2 (which we have
already established is a recipe for trouble).
I installed a new kernel in the VM, and have not had problems since. So
I wonder if some of the kernel files got corrupted, and more generally
if the virtual disks are trustworthy.
Does this /proc/mdstat offer any clues about which disks might be a
problem?
Personalities : [raid1]
md0 : active raid1 sda1[0] sdc1[2] sdb1[1]
96256 blocks [3/3] [UUU]
md1 : active raid1 sdb3[0] sdc3[2] sda3[1]
8187712 blocks [3/3] [UUU]
unused devices: <none>
It seems odd the disks are out of order, that is not sda, sdb, sdc.
I know I could fail some components and add them back to assure
consistency, but this wouldn't tell me if they were inconsistent before
that. There's also the possibility they are consisstent but corrupt.
Rebuiding the VM would take significant time.
Thanks for any advice.
Ross Boylan
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