Neither the blkid or the UUID internal to mdadm work to automount for some reason in Debian
partprobe doesn't work but was a good suggestion from: http://pato.dudits.net/2008/11/03/special-device-uuidxxxxxxxxxxxxxxxx-does-not-exist-especially-with-lvm
mount: special device /dev/disk/by-uuid/431b9b96-29e8f298-e89bd504-7065bddd does not exist
mdadm -D /dev/md_d12
mdadm: metadata format 00.90 unknown, ignored.
/dev/md_d12:
Version : 00.90
Creation Time : Thu Apr 26 03:44:13 2012
Raid Level : raid1
Array Size : 1953511936 (1863.01 GiB 2000.40 GB)
Used Dev Size : 1953511936 (1863.01 GiB 2000.40 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 12
Persistence : Superblock is persistent
Update Time : Wed Jun 6 03:08:39 2012
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
UUID : 431b9b96:29e8f298:e89bd504:7065bddd (local to host one-desktop)
Events : 0.111702
blkid /dev/md_d12
/dev/md_d12: UUID="0cca0399-58e7-44e8-a329-016ccd820ce7" TYPE="ext3"
mount: special device /dev/disk/by-uuid/0cca0399-58e7-44e8-a329-016ccd820ce7 does not exist
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