sudo /sbin/mdadm --detail /dev/md0
/dev/md0:
        Version : 0.90
  Creation Time : Tue Sep 20 15:51:50 2011
     Raid Level : raid1
     Array Size : 77392000 (73.81 GiB 79.25 GB)
  Used Dev Size : 77392000 (73.81 GiB 79.25 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Wed Jan  4 12:46:53 2012
          State : active
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : e3aee2ab:40bfe05e:c91d1289:ceb97d9c
         Events : 0.1312094

    Number   Major   Minor   RaidDevice State
       0       8       33        0      active sync   /dev/sdc1
       1       8        1        1      active sync   /dev/sda1
--(/tmp/etk-svn)---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------(pts/7@main)--
sudo /sbin/mdadm --detail /dev/md2
/dev/md2:
        Version : 1.2
  Creation Time : Fri Aug 26 09:35:47 2011
     Raid Level : raid1
     Array Size : 1463672285 (1395.87 GiB 1498.80 GB)
  Used Dev Size : 1463672285 (1395.87 GiB 1498.80 GB)
   Raid Devices : 2
  Total Devices : 2
    Persistence : Superblock is persistent

    Update Time : Wed Jan  4 12:26:40 2012
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           Name : backup:2
           UUID : ebfb636c:8da2e788:3758c443:7da49e52
         Events : 13494

    Number   Major   Minor   RaidDevice State
       2       8       50        0      active sync   /dev/sdd2
       3       8       66        1      active sync   /dev/sde2