/proc/partitions lists major and minor numbers of partitioned devices as well as their names in /dev. $ cat /proc/partitions major minor #blocks name 1 0 65536 ram0 1 1 65536 ram1 1 2 65536 ram2 1 3 65536 ram3 1 4 65536 ram4 1 5 65536 ram5 1 6 65536 ram6 1 7 65536 ram7 1 8 65536 ram8 1 9 65536 ram9 1 10 65536 ram10 1 11 65536 ram11 1 12 65536 ram12 1 13 65536 ram13 1 14 65536 ram14 1 15 65536 ram15 8 0 372040 sda 8 16 1048580 sdb 8 32 268435456 sdc