user@endor:~$ sudo !!
sudo mdadm -D /dev/md0
[sudo] password for user:
mdadm: Unknown keyword /dev/md0:
mdadm: Unknown keyword Working
/dev/md0:
        Version : 1.2
  Creation Time : Thu Dec  1 22:34:01 2011
     Raid Level : raid5
     Array Size : 2930282496 (2794.54 GiB 3000.61 GB)
  Used Dev Size : 976760832 (931.51 GiB 1000.20 GB)
   Raid Devices : 4
  Total Devices : 4
    Persistence : Superblock is persistent

    Update Time : Mon Mar 12 17:50:36 2012
          State : clean
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 1024K

           Name : endor:0  (local to host endor)
           UUID : 943a40e9:903325f1:40047627:31c6d976
         Events : 6

    Number   Major   Minor   RaidDevice State
       0       8       16        0      active sync   /dev/sdb
       1       8       32        1      active sync   /dev/sdc
       2       8       48        2      active sync   /dev/sdd
       3       8       64        3      active sync   /dev/sde