On Mon, 20 Aug 2012 19:06:17 +0000 "Vanhorn, Mike" <michael.vanhorn@xxxxxxxxxx> wrote: > > I have/had an 8-disk md raid 6, /dev/md0. At some point over the weekend, > two of the disks suddently became marked as "spare" and the other has > disappeared completely (at least as far as mdadm is concerned). > > All eight disks seem to be just fine, so I think the data is okay, and if > I could just convince it to start the array with all 8 disks, I actually > think everything would be fine. However, everything I've tried has come to > nothing, and now I think I am stuck. > > Is there some way to just "force" is to change the two spare disks from > "spare" to "active", and then let it go? > > Here's what I think are relevant details: > > The RAID is/was composed of /dev/sd[bcdefghi]1. > > /proc/mdstat says: > > # cat /proc/mdstat > Personalities : [raid6] > md0 : inactive sdc1[1] sdd1[10] sdi1[8] sdg1[5] sdf1[4] sde1[3] sdh1[2] > 13674583552 blocks > > unused devices: <none> > # > > So, here, sdb is the only one missing. However, if I try to start the array > > # mdadm --assemble /dev/md0 > mdadm: /dev/sdi1 has no superblock - assembly aborted > # What is the result of: mdadm -S /dev/md0 mdadm -Avvv /dev/md0 ?? NeilBrown
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