RAID dead drive? raidtools-1.00.3-2.i386

[dsr at tao.merseine.nu (dsr at tao.merseine.nu)]

On Fri, Nov 25, 2005 at 08:10:43PM -0000, analyst.3852505 at bloglines.com wrote:
>   I seem to have a drive that was setup as part of a two-disk software
> RAID mirror that current displays as the following, using lsraid:
> 
> [dev
>   9,   0] /dev/md0         50682BC2.AE9F5709.D6FF8767.D6946564 online
> [dev
>  22,   1] /dev/hdc1        50682BC2.AE9F5709.D6FF8767.D6946564 good
> [dev
>   ?,   ?] (unknown)        00000000.00000000.00000000.00000000 missing
> 
> I think the second drive, /dev/hdd1, is dead, or hurting and should be replaced.
>  What I'm looking for, is guidance, in replacing the drive - ie., commands
> / steps to remove dead drive and have replacement resume the mirror.

http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html is your
friend.

in particular, sections 6 and 8.

-dsr-