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Broken raid

 
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# 1  
Old 08-25-2012
Broken raid
Hello, I have 2 servers with broken raid 1, but each one gives me a different
error, I dont know what is the difference.

Code:
[root@ ~]# cat /proc/mdstat
Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdb1[2](F) sda1[0]
      2102464 blocks [2/1] [U_]

md1 : active raid1 sdb2[2](F) sda2[0]
      264960 blocks [2/1] [U_]

md2 : active raid1 sdb3[2](F) sda3[0]
      730202368 blocks [2/1] [U_]

unused devices: <none>

Code:
[root@ ~]# cat /proc/mdstat
Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sda1[1]
      2102464 blocks [2/1] [_U]

md1 : active raid1 sda2[1]
      264960 blocks [2/1] [_U]

md2 : active raid1 sda3[1]
      730202368 blocks [2/1] [_U]

unused devices: <none>

# 2  
Old 08-25-2012
In the first case the partitions on sda are working; those on sdb are faulty, so they're not used at the moment, but they're there and so they're ready as available spares (which is not useful with a degraded single-disk raid1).

In the second case the partitions on sda are working, but the other disk is missing.
--
Bye
# 3  
Old 08-25-2012
Thank you for the reply Lem.

so in the first case, where the Letter F appears (F) sda1[0]
I only have to run the commands to rebuild the raid, right ?
# 4  
Old 08-25-2012
Quote:
Originally Posted by MaRiOsGR
Thank you for the reply Lem.

so in the first case, where the Letter F appears (F) sda1[0]
I only have to run the commands to rebuild the raid, right ?
The (F) notation follows the drive which it refers to. So (F) refers to sdb partitions.

Do something like:
Code:
# mdadm /dev/md0 --remove /dev/sdb1
# mdadm /dev/md0 --add /dev/sdb1

to first remove the faulty partition and then add it back to the raid md0.
Then the array will be rebuilded automatically.

Before, please check that sdb is a healthy disk.

You do the same with all your three raids, of course using the right partitions.

BTW: you do have backups, don't you?
--
Bye.
 
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