The system may have suffered a hardware fault, such as a disk drive
failure.  The root device may depend on the RAID devices being online. One
or more of the following RAID devices are degraded:
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
md0 : active (auto-read-on[   95.706273] kjournald starting.  Commit interval 5 seconds
[   95.706438] EXT3-fs (md0): mounted filesystem with ordered data mode
ly) raid1 sda2[0]
      480573376 blocks [2/1] [U_]
      
unused devices: <none>
Attempting to start the RAID in degraded mode...
mdadm: CREATE user root not found
mdadm: CREATE group disk not found
Started the RAID in degraded mode.
done.
Begin: Running /scripts/local-bottom ... done.
done.
Begin: Running /scripts/init-bottom ... done.
[   98.955733] Adding 7811068k swap on /dev/sda1.  Priority:-1 extents:1 across:7811068k 
[  100.160075] EXT3-fs (md0): using internal journal
[  101.332710] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled
[  101.342921] SGI XFS Quota Management subsystem
[  101.351317] XFS (sdb1): Mounting Filesystem
[  101.582347] XFS (sdb1): Starting recovery (logdev: internal)
[  101.689028] XFS (sdb1): Ending recovery (logdev: internal)