mdadm --detail /dev/md0

/dev/md0:
        Version : 00.90.00
  Creation Time : Tue Aug 31 23:35:15 2004
     Raid Level : raid1
     Array Size : 208704 (203.81 MiB 213.71 MB)
    Device Size : 208704 (203.81 MiB 213.71 MB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Tue Oct 24 21:28:00 2006
          State : dirty, no-errors
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0


    Number   Major   Minor   RaidDevice State
       0      22        1        0      active sync   /dev/hdc1
       1      22       65        1      active sync   /dev/hdd1
           UUID : 463dfe4b:903e3a5e:be876c16:653cc561