# btrfs check --readonly /dev/disk/by-uuid/011912ff-8375-4fd0-8568-715cd28c2b8b
Checking filesystem on /dev/disk/by-uuid/011912ff-8375-4fd0-8568-715cd28c2b8b
UUID: 011912ff-8375-4fd0-8568-715cd28c2b8b
checking extents
checking free space tree
checking fs roots
checking csums
checking root refs
found 1023097102336 bytes used, no error found
total csum bytes: 995795540
total tree bytes: 1777254400
total fs tree bytes: 499777536
total extent tree bytes: 156712960
btree space waste bytes: 206534832
file data blocks allocated: 2580921212928
 referenced 1103042093056