Hello all,
My worst fears have been realized!
I've got a file server running RH9 on a Tyan/AMD MB with on-board scsi controller. The OS is on a 30Gb IDE drive and data is stored on two 37Gb scsi hd's in a raid1 array. Today we had some violent weather pass thru and power was going on/off continually for about an hour. Even though the server was on a UPS it finally just crashed, went off-line and just sat there with the hd light on, nothing on the monitor, keyboard did not responed. Pulled the plug, then restarted. Boot up proceeded OK except I saw the message during boot "md0 startup......sda1 failed, disabling device. No extra drive found to reconstruct, continuing with sdb1". Boot completed and all services came back and when I ls /data it's all there. I did a "cat /proc/mdstat" and it only showed sdb1.

I have two new 37Gb scsi hd's still in boxes. What's the best way to put this thing back together? I see lots of info on setting up raid, but how to recover when one drive fails and the other is still running?

Thanks for your attention!

Uh Oh.

Step 1) Make a backup of the offending broken array.
Step 2) Find out if the offending dead disk is still available. try 'fdisk -l' as root to list all the patitions seen at boot.
Step 3) Post your results back here.

Thanks for the quick reply!

Here is the fdisk -l output:

Disk /dev/sda: 36.7 GB, 36703934464 bytes
255 heads, 63 sectors/track, 4462 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 4462 35840983+ fd Linux raid autodetect

Disk /dev/sdb: 36.7 GB, 36703934464 bytes
255 heads, 63 sectors/track, 4462 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 4462 35840983+ fd Linux raid autodetect

Disk /dev/hda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hda1 * 1 4734 38025823+ 83 Linux
/dev/hda2 4735 4865 1052257+ 82 Linux swap

Does this suggest that sda is still viable?