$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid5 sda[7](S) sdf[6] sdb[2] sdc[3] sdd[1](F) sde[4]
      9767564800 blocks super 1.2 level 5, 512k chunk, algorithm 2 [6/4] [__UUUU]

unused devices: <none>