[root@Arch-NAS ~]# btrfs check --readonly /dev/mapper/vgQ-Ferengi
Opening filesystem to check...
Checking filesystem on /dev/mapper/vgQ-Ferengi
UUID: 7011e54b-4426-480f-9659-e4d244b44ed6
[1/7] checking root items
[2/7] checking extents
[3/7] checking free space cache
[4/7] checking fs roots
parent transid verify failed on 7912081915904 wanted 13994 found 14034
parent transid verify failed on 7912081915904 wanted 13994 found 14034
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
^[zparent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
parent transid verify failed on 7912081915904 wanted 13994 found 14034
Ignoring transid failure
leaf parent key incorrect 7912081915904
[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)
ERROR: transid errors in file system
found 7788489871360 bytes used, error(s) found
total csum bytes: 7596169700
total tree bytes: 8101330944
total fs tree bytes: 39370752
total extent tree bytes: 66355200
btree space waste bytes: 322505559
file data blocks allocated: 12439364136960
 referenced 7779948240896