On Friday September 26, tomimo+linux-raid@ncircle.nullnet.fi wrote: > > Hi everybody, > > I have a slight problem here with my RAID 1+0 setup. > One of the discs just failed and I'm unable to figure > out why (for example) mdadm is unable to start the > particular RAID1 (/dev/md4-submirror, failed disc is /dev/sdd). ,,, > > The problem occurred while resynccing the /dev/md4 RAID1-mirror > and of course the "master" device was the faulty one. > The question now is, is someone capable of describing how to get > this /dev/md4-mirror started so that I can continue copying data > out of RAID1+0 (dev/md5) mirror ? You need to assemble the array before it can run, so maybe: mdadm --assemble /dev/md4 --uid=d5c2d1f7:cf7cb245:2d9e7057:097ec133 /dev/sd* then mdadm --assemble /dev/md5 /dev/md3 /dev/md4 If now, what errors do you get, and what does "cat /proc/mdstat" show? NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html