Power loss causes bad magic number??

[Eric Sandeen]

Eric Sandeen wrote:

> Dunno how much damage could have been done, or if you can just try to
> fix the assembly perhaps...?
> 
> -Eric

FWIW on a 3-disk raid5:

[root at inode tmp]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 loop3[2] loop2[1] loop1[0]
      262016 blocks level 5, 4k chunk, algorithm 2 [3/3] [UUU]

unused devices: <none>

it's the 0th device which should have the superblock:

[root at inode tmp]# file -s /dev/loop[123]
/dev/loop1: SGI XFS filesystem data (blksz 4096, inosz 256, v2 dirs)
/dev/loop2: data
/dev/loop3: data

whereas yours was the 1st (not 0th)

(I wasn't sure how mdstat showed the order so double checked...)

-Eric