cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath]
md1 : active raid6 sdb3[14](S) sde3[8] sdg3[9] sdh3[7] sda3[10] sdd3[13] sdc3[12] sdf3[11]
19485317120 blocks super 1.0 level 6, 512k chunk, algorithm 2 [7/7] [UUUUUUU]
bitmap: 1/15 pages [4KB], 131072KB chunk