mdstat

Personalities : [raid1] [raid10] [raid6] [raid5] [raid4]
md3 : active raid10 sda7[0] sdc7[2] sdb7[1]
      264831360 blocks 64K chunks 2 far-copies [3/3] [UUU]

md2 : active raid5 sda6[0] sdc6[2] sdb6[1]
      97658880 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]

md1 : active raid10 sda5[0] sdc5[2] sdb5[1]
      29302336 blocks 64K chunks 2 near-copies [3/3] [UUU]

md0 : active raid1 sda1[0] sdc1[2] sdb1[1]
      192640 blocks [3/3] [UUU]

unused devices: <none>