banting:/var/log# mdadm --detail /dev/md4
/dev/md4:
        Version : 00.90.03
  Creation Time : Thu Oct 18 23:30:19 2007
     Raid Level : raid1
     Array Size : 29294400 (27.94 GiB 30.00 GB)
    Device Size : 29294400 (27.94 GiB 30.00 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 4
    Persistence : Superblock is persistent

    Update Time : Wed Feb 13 22:29:13 2008
          State : clean, degraded
 Active Devices : 1
Working Devices : 1
 Failed Devices : 1
  Spare Devices : 0

           UUID : c49b8678:8c7d2868:ba790a16:73239154
         Events : 0.496994

    Number   Major   Minor   RaidDevice State
       0       0        0        0      removed
       1       8       22        1      active sync   /dev/sdb6

       2       8        6        -      faulty spare   /dev/sda6
banting:/var/log#