$ cat /proc/partitions major minor #blocks name 7 0 91264 loop0 7 1 56012 loop1 7 2 90604 loop2 259 0 244198584 nvme0n1 8 0 488386584 sda 8 1 1024 sda1 8 2 488383488 sda2 8 16 6836191232 sdb 8 32 6836191232 sdc