root@DiskStation:~# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] md2 : active raid1 sdb3[1] sda3[0] 3902196544 blocks super 1.2 [2/2] [UU] [=>...................] resync = 9.3% (365400320/3902196544) finish=1000.7min speed=58904K/sec md1 : active raid1 sda2[1] sdb2[0] 2097088 blocks [2/2] [UU] md0 : active raid1 sda1[1] sdb1[0] 2490176 blocks [2/2] [UU] unused devices: root@DiskStation:~# cat /proc/partitions major minor #blocks name 8 0 3907018584 sda 8 1 2490240 sda1 8 2 2097152 sda2 8 3 3902197584 sda3 8 16 3907018584 sdb 8 17 2490240 sdb1 8 18 2097152 sdb2 8 19 3902197584 sdb3 31 0 512 mtdblock0 31 1 2048 mtdblock1 31 2 1280 mtdblock2 31 3 64 mtdblock3 31 4 128 mtdblock4 31 5 64 mtdblock5 9 0 2490176 md0 9 1 2097088 md1 9 2 3902196544 md2 253 0 12288 dm-0 253 1 1048576000 dm-1 253 2 1048576000 dm-2 253 3 1048576000 dm-3 253 4 756453376 dm-4 root@DiskStation:~#