Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] md0 : active raid1 sdc2[1] sdb1[0] 536738816 blocks super 1.2 [2/2] [UU] bitmap: 0/4 pages [0KB], 65536KB chunk md2 : active raid1 sdb2[0] sdd1[1] 536738816 blocks super 1.2 [2/2] [UU] bitmap: 1/4 pages [4KB], 65536KB chunk md1 : active raid1 sdd2[1] sdc1[0] 536738816 blocks super 1.2 [2/2] [UU] bitmap: 0/4 pages [0KB], 65536KB chunk unused devices: