On 14/01/20 14:47, William Morgan wrote: > Well, I went ahead and tried the forced assembly: > > bill@bill-desk:~$ sudo mdadm --assemble --force /dev/md1 /dev/sdg1 > /dev/sdh1 /dev/sdi1 > [sudo] password for bill: > mdadm: Merging with already-assembled /dev/md/1 This looks like your problem ... it looks like you have a failed assembly active. Did you do an "mdadm --stop /dev/md1"? You should always do that between every attempt. > mdadm: Marking array /dev/md/1 as 'clean' > mdadm: failed to RUN_ARRAY /dev/md/1: Input/output error > I hope that's a good sign - if it's got an array that doesn't make sense then everything should have stopped at that point and the --force won't have done any damage. > (The drive letters have changed because I removed a bunch of other > drives. The original drives are now on sd[b,c,d,e] and the copies are > on sd[f,g,h,i] with sdf being a copy of the presumably bad sdb with > the event count which doesn't agree with the other 3 disks.) Make sure md1 doesn't appear to exist at all (--stop), and then try again ... Cheers, Wol
