Fixing a Linux RAID 1 software mirror

Bruno Wolff III bruno at wolff.to
Sat Jul 17 14:09:29 UTC 2004


On Sat, Jul 17, 2004 at 07:16:36 -0400,
  "Christopher K. Johnson" <ckjohnson at gwi.net> wrote:
> 
> The missing and (unknown) indication I have seen once, and it was when a 
> hard drive failed completely. In my case the hard drive had to be 
> replaced, but some of the scsi controller status was wedged due to the 
> unresponsive drive. So I was not able to hot-swap the drive as the same 
> drive name. I ended up having to shutdown, swap drives, and boot back 
> up, then partition the new drive and bring mirrors in sync.

Under Redhat 9 I had a problem with either the controller card driver or
software raid. I was losing disks from my raid sets within hours of
getting them sync'd back up regularly. smartctl showed the drives
as reporting no errors. Once I upgraded to FC2 everything was fine.
So there are other possibilities besides hardware problems.





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