On Mon, May 08, 2006 at 11:30:52PM -0600, Maurice Hilarius wrote:
[root@box ~]# mdadm /dev/md3 -a /dev/sdw1
But, I get this error message:
mdadm: hot add failed for /dev/sdw1: No such device
What? We just made the partition on sdw a moment ago in fdisk. It IS there!
I don't believe you, prove it (/proc/partitions)
So. we look around a bit:
# /cat/proc/mdstat
md3 : inactive sdq1[0] sdaf1[15] sdae1[14] sdad1[13] sdac1[12] sdab1[11]
sdaa1[10] sdz1[9] sdy1[8] sdx1[7] sdv1[5] sdu1[4] sdt1[3] sds1[2]
sdr1[1]
5860631040 blocks
Yup, that looks correct, missing sdw1[6]
no, it does not, it is 'inactive'
[root@box ~]# cat /proc/mdstat
Personalities : [raid1] [raid5]
...
md3 : inactive sdq1[0] sdaf1[15] sdae1[14] sdad1[13] sdac1[12] sdab1[11]
sdaa1[10] sdz1[9] sdy1[8] sdx1[7] sdv1[5] sdu1[4] sdt1[3] sds1[2]
sdr1[1]
5860631040 blocks
...
[root@box ~]# mdadm /dev/md3 -a /dev/sdw1
mdadm: hot add failed for /dev/sdw1: No such device
OK, let's mount the degraded RAID and try to copy the files to somewhere
else, so we can make it from scratch:
[root@box ~]# mount /dev/md3 /all/boxw16/
/dev/md3: Invalid argument
mount: /dev/md3: can't read superblock
it is still inactive, no wonder you cannot access it.
try running the array, or really stop it before assembling.
L.
--
Luca Berra -- bluca@xxxxxxxxxx
Communication Media & Services S.r.l.
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