CentOS 6 - Remove Drive from RAID
Posted on 2012-03-14
We have a server built last June that has 2 Crucial SSD drives in RAID 1.
In recent months we've been having errors to the point that the server is no longer operational. The errors appeared to be from defective drives, but Crucial support informed me today that their drives are not equipped for RAID and do not support it.
Their advice was to split the drives out of RAID and use one or both, but not in RAID. They said that after a while the GC & Trim would catch up and the drives should at least be stable (though without the mirroring).
I tried following their advice to disconnect one drive, and to toggle the BIOS RAID to SATA, but now when CentOS 6 boots I see the splash screen, then a Kernel Panic alert "attempted to kill init".
I tried booting from CD into rescue, but because the SSD still has RAID meta data rescue ignores it.
What's the best way to take the drives out of RAID 1 without losing the data on the drives?
How do I get CentOS to recognize the drive(s) in the new configuration?