btrfs check

Opening filesystem to check...
Checking filesystem on /dev/sda1
UUID: 5f7e3fb0-6cde-ac1a-b457-c289a3a916fc
[1/7] checking root items
[2/7] checking extents
[3/7] checking free space cache
[4/7] checking fs roots
[5/7] checking only csums items (without verifying data)
[6/7] checking root refs
[7/7] checking quota groups skipped (not enabled on this FS)
found 1446579507200 bytes used, no error found
total csum bytes: 1410662692
total tree bytes: 2060517376
total fs tree bytes: 353255424
total extent tree bytes: 49332224
btree space waste bytes: 229386297
file data blocks allocated: 2888006668288
 referenced 2888006668288