I've been reading various FAQs and HOWTOs, but for some reason can't really
get an answer to what I assume is a simple question about how best to get a
failed md RAID 1 partition back into an array.
After a power-outage, I see that cat /proc/mdstat shows:
Personalities : [raid1]
read_ahead 1024 sectors
Event: 3
md1 : active raid1 hdg3[1]
178787264 blocks [2/1] [_U]
md0 : active raid1 hde2[0] hdg2[1]
2048192 blocks [2/2] [UU]
md2 : active raid1 hde1[0] hdg1[1]
104320 blocks [2/2] [UU]
unused devices: <none>
So it looks like /dev/hde3 is down. I'm not sure exactly why this is, but
there were some console messages about a bad block or something. So,
assuming hdg3 is OK (which it seems to be) can I just do the following?
Copy good partition to bad one:
dd if=/dev/hdg3 of=/dev/hde3
Add the resulting copy to the raid:
raidhotadd /dev/md1 /dev/hde3
fsck /dev/md1 to make sure all is well.
Is there a better way?
Jonathan
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