daunderground@ubuntu:~$ cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid1] [raid10]
md0 : active raid5 sdc[5] sdd1[3] sdb[4]
      3906763776 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [U_U]
      [>....................]  recovery =  0.0% (90112/1953381888) finish=32538.5min speed=1000K/sec

unused devices: <none>