also sprach Daniel Bareiro <daniel-listas@gmx.net> [2010.08.02.0420 +0200]:
> md2 : active raid5 sda3[0] sdd3[4](F) sdc3[2]
> 2136170880 blocks level 5, 64k chunk, algorithm 2 [4/2] [U_U_]
[…]
> That is to say, the RAID has four disks and failed both the spare
> disk and other disk from array. What is unclear to me is why if
> there are two active disks,
There is no spare disk. The reason why sdd is listed as "faulty
spare" is because it's out of sync. Remove and re-add it:
mdadm --remove /dev/md2 /dev/sdd3
mdadm --add /dev/md2 /dev/sdd3
> md2 : active raid5 sdb3[4](S) sda3[0] sdd3[5](F) sdc3[2]
> 2136170880 blocks level 5, 64k chunk, algorithm 2 [4/2] [U_U_]
This is indeed a bit strange, but the array might start syncing in
the new disk (called a spare) as soon as you remove sdd3 (see
above).
--
.''`. martin f. krafft <madduck@d.o> Related projects:
: :' : proud Debian developer http://debiansystem.info
`. `'` http://people.debian.org/~madduck http://vcs-pkg.org
`- Debian - when you have better things to do than fixing systems
"if there's anything more important than my ego,
i want it caught and shot now."
-- zaphod beeblebrox
Attachment:
digital_signature_gpg.asc
Description: Digital signature (see http://martin-krafft.net/gpg/)