On Fri, 4 Dec 2009 14:46:39 -0500 Lucian Șandor <lucisandor@xxxxxxxxx> wrote: > Hi all, > There is a problem with my Linux installation, and the drives get > renamed and reordered all the time. Now, it just happened that the two > degraded RAID5s won't return to life. The system would not boot, so I > panicked and deleted: fstab, mdadm.conf, and some of the superblocks. > Now Linux boots, but RAIDs are, of course, dead. I tried to re-create > the arrays, but I cannot recall the correct order and my attempts > failed. I believe that the partitions are OK, because I don't recall > re-creating without "missing", but surely the superblocks are damaged > and certanily most of them are zero now. > Is there a short way to recover the degraded RAIDs without knowing the > order of drives? I have 6 drives in one (including "missing"), that > gives 720 permutations. Also, clearing the superblocks is recoverable, > isn't it? Yes, 720 permutations. But you can probably write a script to generate them all ... how good are your programming skills? Use "--assume-clean" to create the array so that it doesn't auto-resync. Then "fsck -n" to see of the data is even close to correct. And why would you think that erasing the superblocks is a recoverable operation? It isn't. NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
