major minor #blocks name 8 0 488386584 sda 8 1 1048576 sda1 8 2 4194304 sda2 8 3 483142656 sda3 8 16 1953514584 sdb 8 17 1048576 sdb1 8 18 4194304 sdb2 8 19 1948270680 sdb3