I've actually had a check running for the past 10 hours or so. It got far enough, so I stopped it. The output is attached.
Opening filesystem to check... Checking filesystem on /dev/sdh1 UUID: c73a1699-41e6-445f-82f1-116e6e46eb64 [1/7] checking root items [2/7] checking extents parent transid verify failed on 2629033574400 wanted 610408 found 611020 parent transid verify failed on 2629033574400 wanted 610408 found 611020 parent transid verify failed on 2629033574400 wanted 610408 found 611020 parent transid verify failed on 2629033574400 wanted 610408 found 611020 Ignoring transid failure leaf parent key incorrect 2629033574400 bad block 2629033574400 ERROR: errors found in extent allocation tree or chunk allocation [3/7] checking free space cache block group 113845993472 has wrong amount of free space, free space cache has 20287488 block group has 20549632 failed to load free space cache for block group 113845993472 block group 1088803569664 has wrong amount of free space, free space cache has 1048576 block group has 1310720 failed to load free space cache for block group 1088803569664 block group 1424322723840 has wrong amount of free space, free space cache has 25493504 block group has 25755648 failed to load free space cache for block group 1424322723840 [4/7] checking fs roots [5/7] checking only csums items (without verifying data) [6/7] checking root refs [7/7] checking quota groups
