root@server:~# mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Tue Mar 27 22:21:59 2007
     Raid Level : raid5
    Device Size : 16281728 (15.53 GiB 16.67 GB)
   Raid Devices : 3
  Total Devices : 5
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Wed Mar 28 00:27:10 2007
          State : active, degraded, Not Started
 Active Devices : 1
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 4

         Layout : left-symmetric
     Chunk Size : 32K

           UUID : e1ce7a2a:b16261d8:973c03f8:253844ac
         Events : 0.12

    Number   Major   Minor   RaidDevice State
       0       8       48        0      active sync   /dev/sdd
       1       0        0        1      removed
       2       0        0        2      removed

       3       8       32        -      spare   /dev/sdc
       4       8       16        -      spare   /dev/sdb
       5       8       64        -      spare   /dev/sde
       6       8       80        -      spare   /dev/sdf