mdadm --misc --detail /dev/md3
/dev/md3:
        Version : 0.90
  Creation Time : Thu Sep  4 17:06:34 2014
     Raid Level : raid1
     Array Size : 3886010304 (3705.99 GiB 3979.27 GB)
  Used Dev Size : -1
   Raid Devices : 6
  Total Devices : 6
Preferred Minor : 3
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Thu Sep  4 17:17:24 2014
          State : active
 Active Devices : 6
Working Devices : 6
 Failed Devices : 0
  Spare Devices : 0

           UUID : f8ab5835:342afa6c:a4d2adc2:26fd5302
         Events : 0.1

    Number   Major   Minor   RaidDevice State
       0       8        3        0      active sync   /dev/sda3
       1       8       19        1      active sync   /dev/sdb3
       2       8       35        2      active sync   /dev/sdc3
       3       8       51        3      active sync   /dev/sdd3
       4       8       67        4      active sync   /dev/sde3
       5       8       83        5      active sync   /dev/sdf3