So it says my disk is healthy...
SMART overall-health self-assigment test result: PASSED
Below the log for sudo btrfs check /dev/sdb2
Opening filesystem to check...
Checking filesystem on /dev/sdb2
UUID: ed3ac838-2546-44d1-927c-9afa10591963
[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
checksum verify failed on 1301348352 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 1301348352 wanted 0x00000000 found 0xb6bde3e4
bad tree block 1301348352, bytenr mismatch, want=1301348352, have=0
checksum verify failed on 1915568128 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 1915568128 wanted 0x00000000 found 0xb6bde3e4
bad tree block 1915568128, bytenr mismatch, want=1915568128, have=0
checksum verify failed on 239453913088 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 239453913088 wanted 0x00000000 found 0xb6bde3e4
bad tree block 239453913088, bytenr mismatch, want=239453913088, have=0
checksum verify failed on 1863925760 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 1863925760 wanted 0x00000000 found 0xb6bde3e4
bad tree block 1863925760, bytenr mismatch, want=1863925760, have=0
checksum verify failed on 380218982400 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 380218982400 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380218982400, bytenr mismatch, want=380218982400, have=0
checksum verify failed on 381120118784 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 381120118784 wanted 0x00000000 found 0xb6bde3e4
bad tree block 381120118784, bytenr mismatch, want=381120118784, have=0
...
checksum verify failed on 380186574848 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380186574848, bytenr mismatch, want=380186574848, have=0
checksum verify failed on 380186968064 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 380186968064 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380186968064, bytenr mismatch, want=380186968064, have=0
checksum verify failed on 380186984448 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 380186984448 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380186984448, bytenr mismatch, want=380186984448, have=0
checksum verify failed on 380888023040 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 380888023040 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380888023040, bytenr mismatch, want=380888023040, have=0
checksum verify failed on 380239069184 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 380239069184 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380239069184, bytenr mismatch, want=380239069184, have=0
checksum verify failed on 1990950912 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 1990950912 wanted 0x00000000 found 0xb6bde3e4
bad tree block 1990950912, bytenr mismatch, want=1990950912, have=0
checksum verify failed on 380237201408 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 380237201408 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380237201408, bytenr mismatch, want=380237201408, have=0
checksum verify failed on 380239085568 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 380239085568 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380239085568, bytenr mismatch, want=380239085568, have=0
checksum verify failed on 380980920320 wanted 0x00000000 found 0xb6bde3e4
checksum verify failed on 380980920320 wanted 0x00000000 found 0xb6bde3e4
bad tree block 380980920320, bytenr mismatch, want=380980920320, have=0
Counts for qgroup id: 0/257 are different
our: referenced 130401579008 referenced compressed 130401579008
disk: referenced 130401579008 referenced compressed 130401579008
our: exclusive 130391613440 exclusive compressed 130391613440
disk: exclusive 130401579008 exclusive compressed 130401579008
diff: exclusive -9965568 exclusive compressed -9965568
Counts for qgroup id: 0/262 are different
our: referenced 3964612608 referenced compressed 3964612608
disk: referenced 3964612608 referenced compressed 3964612608
our: exclusive 3962691584 exclusive compressed 3962691584
disk: exclusive 3964612608 exclusive compressed 3964612608
diff: exclusive -1921024 exclusive compressed -1921024
Counts for qgroup id: 0/621 are different
our: referenced 17629634560 referenced compressed 17629634560
disk: referenced 17629634560 referenced compressed 17629634560
our: exclusive 2142941184 exclusive compressed 2142941184
disk: exclusive 2143252480 exclusive compressed 2143252480
diff: exclusive -311296 exclusive compressed -311296
Counts for qgroup id: 0/692 are different
our: referenced 17879035904 referenced compressed 17879035904
disk: referenced 17879035904 referenced compressed 17879035904
our: exclusive 1518051328 exclusive compressed 1518051328
disk: exclusive 1518084096 exclusive compressed 1518084096
diff: exclusive -32768 exclusive compressed -32768
Counts for qgroup id: 0/699 are different
our: referenced 17716830208 referenced compressed 17716830208
disk: referenced 17716830208 referenced compressed 17716830208
our: exclusive 511782912 exclusive compressed 511782912
disk: exclusive 511815680 exclusive compressed 511815680
diff: exclusive -32768 exclusive compressed -32768
Counts for qgroup id: 0/700 are different
our: referenced 17763328000 referenced compressed 17763328000
disk: referenced 17763328000 referenced compressed 17763328000
our: exclusive 10772480 exclusive compressed 10772480
disk: exclusive 10805248 exclusive compressed 10805248
diff: exclusive -32768 exclusive compressed -32768
found 188979650560 bytes used, error(s) found
total csum bytes: 175937712
total tree bytes: 2596880384
total fs tree bytes: 2222473216
total extent tree bytes: 146898944
btree space waste bytes: 446872914
file data blocks allocated: 228774150144
referenced 279597383680
