$ 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