major minor #blocks name 8 0 2097152000 sda 8 1 614400 sda1 8 2 1048576 sda2 8 3 50763776 sda3 8 4 2044724207 sda4 8 16 2097152000 sdb 8 17 2097150976 sdb1 11 0 1048575 sr0 253 0 4187459584 dm-0 253 1 5169152 dm-1 7 0 4194304 loop0