nas brot # mdadm -D /dev/md2
/dev/md2:
        Version : 1.2
  Creation Time : Tue Aug 28 04:45:52 2012
     Raid Level : raid5
     Array Size : 52430848 (50.00 GiB 53.69 GB)
  Used Dev Size : 26215424 (25.00 GiB 26.84 GB)
   Raid Devices : 3
  Total Devices : 3
    Persistence : Superblock is persistent

    Update Time : Mon Nov 17 23:42:11 2014
          State : clean 
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 512K

           Name : localhost.localdomain:2
           UUID : a9d908f3:f8632fcf:59a69085:83d5f6aa
         Events : 10324

    Number   Major   Minor   RaidDevice State
       0       8       51        0      active sync   /dev/sdd3
       6       8       67        1      active sync   /dev/sde3
       5       8       35        2      active sync   /dev/sdc3
nas brot # mdadm -D /dev/md4
/dev/md4:
        Version : 1.2
  Creation Time : Mon Dec  9 22:06:12 2013
     Raid Level : raid5
     Array Size : 5753362432 (5486.83 GiB 5891.44 GB)
  Used Dev Size : 2876681216 (2743.42 GiB 2945.72 GB)
   Raid Devices : 3
  Total Devices : 3
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sun Nov 30 21:05:22 2014
          State : clean 
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 512K

           Name : nas:4  (local to host nas)
           UUID : f6924d42:7358df85:416f97f9:83aeac62
         Events : 16217

    Number   Major   Minor   RaidDevice State
       3       8       52        0      active sync   /dev/sdd4
       1       8       36        1      active sync   /dev/sdc4
       2       8       68        2      active sync   /dev/sde4