root@kvm:~# mdadm -E /dev/sd[a,b,c,d,e,f]
/dev/sda:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 53972ab6:709a62d9:0e179a19:a8f1b363
           Name : Geonosis:0
  Creation Time : Fri Sep 28 20:55:46 2012
     Raid Level : raid5
   Raid Devices : 4

 Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
     Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
  Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262064 sectors, after=176 sectors
          State : clean
    Device UUID : f7f19ddd:0ac2b16f:1e18253e:4de69814

    Update Time : Sun Aug 24 01:55:54 2014
       Checksum : 14d72679 - correct
         Events : 62418

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 53972ab6:709a62d9:0e179a19:a8f1b363
           Name : Geonosis:0
  Creation Time : Fri Sep 28 20:55:46 2012
     Raid Level : raid5
   Raid Devices : 4

 Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
     Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
  Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262064 sectors, after=176 sectors
          State : clean
    Device UUID : 48b371ed:21700ca4:eea7f6e6:6faf46ff

    Update Time : Sun Aug 24 01:55:54 2014
       Checksum : ec84eed3 - correct
         Events : 62418

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 53972ab6:709a62d9:0e179a19:a8f1b363
           Name : Geonosis:0
  Creation Time : Fri Sep 28 20:55:46 2012
     Raid Level : raid5
   Raid Devices : 4

 Avail Dev Size : 3906766959 (1862.89 GiB 2000.26 GB)
     Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
  Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
    Data Offset : 260096 sectors
   Super Offset : 8 sectors
   Unused Space : before=260016 sectors, after=111 sectors
          State : clean
    Device UUID : be869bd5:1f6fd087:336d10a4:ce230be7

    Update Time : Sun Aug 24 01:55:54 2014
       Checksum : 5d50f2ac - correct
         Events : 62418

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : spare
   Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 53972ab6:709a62d9:0e179a19:a8f1b363
           Name : Geonosis:0
  Creation Time : Fri Sep 28 20:55:46 2012
     Raid Level : raid5
   Raid Devices : 4

 Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
     Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
  Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262064 sectors, after=176 sectors
          State : clean
    Device UUID : 5b703038:2ad8bdbb:d0841461:677b9773

    Update Time : Sun Aug 24 01:55:54 2014
       Checksum : 3d63bcc7 - correct
         Events : 62418

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 2
   Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sde:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 53972ab6:709a62d9:0e179a19:a8f1b363
           Name : Geonosis:0
  Creation Time : Fri Sep 28 20:55:46 2012
     Raid Level : raid5
   Raid Devices : 4

 Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
     Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
  Used Dev Size : 3906766848 (1862.89 GiB 2000.26 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262056 sectors, after=176 sectors
          State : clean
    Device UUID : 573adde6:93aa171d:9a878ada:13d10d41

    Update Time : Sun Aug 24 01:55:54 2014
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : 945eb1ee - correct
         Events : 62418

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 3
   Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdf:
   MBR Magic : aa55
Partition[0] :     52731904 sectors at         2048 (type fd)
Partition[1] :      7882754 sectors at     52735998 (type 05)