So at this point I have partitions 5, 6, and 7 happy; 8 - 14 are marked
inactive...
NeilBrown was kind enough to offer some advice. Here's the short version,
for anyone who runs across this searching:
1) Yes, metadata version 0.91 is OK, it just means a reshape is pending.
2) Mismatches in 'this' are most likely due to probe ordering changes; no
problem.
3) The most likely cause for a failure like this if you know that the
critical section was passed, and the checksums etc. are consistent, is
simply that the backup of the critical section is too old:
3a) mdadm -A -v will confirm that the issue is that the backup is too old:
it will say 'too-old timestamp on backup-metadata on xxxx' and, indeed,
that was my issue.
3b) export MDADM_GROW_ALLOW_OLD=1 will allow mdadm -A to use the old backup
anyway.
...and I'm happy to report that that worked just fine. I was using mdadm
3.2.5 for this; I don't know if 3.2.3 (which Ubuntu 12.04 ships with)
supports MDADM_GROW_ALLOW_OLD.
Thanks, Neil!
-- Flynn
--
Церковь близко, но дорога очень
скользкая; пивнушка далеко, но я буду идти
осторожно. (Yakov
Smirnoff)
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