backref disk bytenr does not match extent record

[MasterCATZ]

so what should I do ?

I use mergerFS and have other drives spreading the data around , and been trying to work out why I have been getting IO hangs everytime I save a new file / Folder now
after scanning through every drive finally found the one that seems to be having a btrfs issue
nothing wrong with the disk but btrfs has gone and ...

aio@aio:~$ sudo btrfs check --readonly --force /dev/mapper/SRD7NA1B6-part1
[sudo] password for aio: 
Opening filesystem to check...
WARNING: filesystem mounted, continuing because of --force
Checking filesystem on /dev/mapper/SRD7NA1B6-part1
UUID: 89395c82-5b62-43de-8cf2-1064e18d2b0a
[1/7] checking root items
[2/7] checking extents
ref mismatch on [1749129351168 49152] extent item 2, found 1
incorrect local backref count on 1749129351168 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23181d0f0
backref disk bytenr does not match extent record, bytenr=1749129351168, ref bytenr=0
backpointer mismatch on [1749129351168 49152]
ref mismatch on [1846858219520 86016] extent item 2, found 1
incorrect local backref count on 1846858219520 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d231513eb0
backref disk bytenr does not match extent record, bytenr=1846858219520, ref bytenr=0
backpointer mismatch on [1846858219520 86016]
ref mismatch on [1847212650496 151552] extent item 2, found 1
incorrect local backref count on 1847212650496 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2384cce20
backref disk bytenr does not match extent record, bytenr=1847212650496, ref bytenr=0
backpointer mismatch on [1847212650496 151552]
ref mismatch on [1858006818816 53248] extent item 2, found 1
incorrect local backref count on 1858006818816 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2320f8990
backref disk bytenr does not match extent record, bytenr=1858006818816, ref bytenr=0
backpointer mismatch on [1858006818816 53248]
ref mismatch on [1858046676992 1052672] extent item 2, found 1
incorrect local backref count on 1858046676992 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2320faff0
backref disk bytenr does not match extent record, bytenr=1858046676992, ref bytenr=0
backpointer mismatch on [1858046676992 1052672]
ref mismatch on [1858047729664 1052672] extent item 2, found 1
incorrect local backref count on 1858047729664 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2320fb180
backref disk bytenr does not match extent record, bytenr=1858047729664, ref bytenr=0
backpointer mismatch on [1858047729664 1052672]
ref mismatch on [1858048782336 528384] extent item 2, found 1
incorrect local backref count on 1858048782336 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2320fb310
backref disk bytenr does not match extent record, bytenr=1858048782336, ref bytenr=0
backpointer mismatch on [1858048782336 528384]
ref mismatch on [1858049310720 1052672] extent item 2, found 1
incorrect local backref count on 1858049310720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2320fb4a0
backref disk bytenr does not match extent record, bytenr=1858049310720, ref bytenr=0
backpointer mismatch on [1858049310720 1052672]
ref mismatch on [1858065477632 69632] extent item 2, found 1
incorrect local backref count on 1858065477632 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2320fc4e0
backref disk bytenr does not match extent record, bytenr=1858065477632, ref bytenr=0
backpointer mismatch on [1858065477632 69632]
ref mismatch on [1858362576896 528384] extent item 2, found 1
incorrect local backref count on 1858362576896 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23210bb70
backref disk bytenr does not match extent record, bytenr=1858362576896, ref bytenr=0
backpointer mismatch on [1858362576896 528384]
ref mismatch on [1858363105280 1052672] extent item 2, found 1
incorrect local backref count on 1858363105280 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23210bd00
backref disk bytenr does not match extent record, bytenr=1858363105280, ref bytenr=0
backpointer mismatch on [1858363105280 1052672]
ref mismatch on [1858364157952 774144] extent item 2, found 1
incorrect local backref count on 1858364157952 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23210be90
backref disk bytenr does not match extent record, bytenr=1858364157952, ref bytenr=0
backpointer mismatch on [1858364157952 774144]
ref mismatch on [1858669809664 1052672] extent item 2, found 1
incorrect local backref count on 1858669809664 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d24207a1c0
backref disk bytenr does not match extent record, bytenr=1858669809664, ref bytenr=0
backpointer mismatch on [1858669809664 1052672]
ref mismatch on [1858670862336 266240] extent item 2, found 1
incorrect local backref count on 1858670862336 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d24207a350
backref disk bytenr does not match extent record, bytenr=1858670862336, ref bytenr=0
backpointer mismatch on [1858670862336 266240]
ref mismatch on [1858671128576 1052672] extent item 2, found 1
incorrect local backref count on 1858671128576 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d24207a4e0
backref disk bytenr does not match extent record, bytenr=1858671128576, ref bytenr=0
backpointer mismatch on [1858671128576 1052672]
ref mismatch on [1858672181248 282624] extent item 2, found 1
incorrect local backref count on 1858672181248 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d24207a670
backref disk bytenr does not match extent record, bytenr=1858672181248, ref bytenr=0
backpointer mismatch on [1858672181248 282624]
ref mismatch on [1858672463872 1052672] extent item 2, found 1
incorrect local backref count on 1858672463872 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d24207a800
backref disk bytenr does not match extent record, bytenr=1858672463872, ref bytenr=0
backpointer mismatch on [1858672463872 1052672]
ref mismatch on [1859008856064 266240] extent item 2, found 1
incorrect local backref count on 1859008856064 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d232122610
backref disk bytenr does not match extent record, bytenr=1859008856064, ref bytenr=0
backpointer mismatch on [1859008856064 266240]
ref mismatch on [1859009122304 1052672] extent item 2, found 1
incorrect local backref count on 1859009122304 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2321227a0
backref disk bytenr does not match extent record, bytenr=1859009122304, ref bytenr=0
backpointer mismatch on [1859009122304 1052672]
ref mismatch on [1859092791296 1052672] extent item 2, found 1
incorrect local backref count on 1859092791296 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d232129c50
backref disk bytenr does not match extent record, bytenr=1859092791296, ref bytenr=0
backpointer mismatch on [1859092791296 1052672]
ref mismatch on [1859093843968 790528] extent item 2, found 1
incorrect local backref count on 1859093843968 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d232129de0
backref disk bytenr does not match extent record, bytenr=1859093843968, ref bytenr=0
backpointer mismatch on [1859093843968 790528]
ref mismatch on [1859095433216 2101248] extent item 2, found 1
incorrect local backref count on 1859095433216 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23212a7c0
backref disk bytenr does not match extent record, bytenr=1859095433216, ref bytenr=0
backpointer mismatch on [1859095433216 2101248]
ref mismatch on [1859097534464 790528] extent item 2, found 1
incorrect local backref count on 1859097534464 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23212a950
backref disk bytenr does not match extent record, bytenr=1859097534464, ref bytenr=0
backpointer mismatch on [1859097534464 790528]
ref mismatch on [1859593400320 1052672] extent item 2, found 1
incorrect local backref count on 1859593400320 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242282780
backref disk bytenr does not match extent record, bytenr=1859593400320, ref bytenr=0
backpointer mismatch on [1859593400320 1052672]
ref mismatch on [1859757731840 774144] extent item 2, found 1
incorrect local backref count on 1859757731840 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23217f130
backref disk bytenr does not match extent record, bytenr=1859757731840, ref bytenr=0
backpointer mismatch on [1859757731840 774144]
ref mismatch on [1859771207680 20480] extent item 2, found 1
incorrect local backref count on 1859771207680 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23217fd70
backref disk bytenr does not match extent record, bytenr=1859771207680, ref bytenr=0
backpointer mismatch on [1859771207680 20480]
ref mismatch on [1859777302528 413696] extent item 2, found 1
incorrect local backref count on 1859777302528 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddaedd0
backref disk bytenr does not match extent record, bytenr=1859777302528, ref bytenr=0
backpointer mismatch on [1859777302528 413696]
ref mismatch on [1859823501312 643072] extent item 2, found 1
incorrect local backref count on 1859823501312 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb0f70
backref disk bytenr does not match extent record, bytenr=1859823501312, ref bytenr=0
backpointer mismatch on [1859823501312 643072]
ref mismatch on [1859829854208 528384] extent item 2, found 1
incorrect local backref count on 1859829854208 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb1820
backref disk bytenr does not match extent record, bytenr=1859829854208, ref bytenr=0
backpointer mismatch on [1859829854208 528384]
ref mismatch on [1859852173312 528384] extent item 2, found 1
incorrect local backref count on 1859852173312 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb2de0
backref disk bytenr does not match extent record, bytenr=1859852173312, ref bytenr=0
backpointer mismatch on [1859852173312 528384]
ref mismatch on [1859852701696 610304] extent item 2, found 1
incorrect local backref count on 1859852701696 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb2f70
backref disk bytenr does not match extent record, bytenr=1859852701696, ref bytenr=0
backpointer mismatch on [1859852701696 610304]
ref mismatch on [1859853312000 1052672] extent item 2, found 1
incorrect local backref count on 1859853312000 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb3100
backref disk bytenr does not match extent record, bytenr=1859853312000, ref bytenr=0
backpointer mismatch on [1859853312000 1052672]
ref mismatch on [1859856117760 790528] extent item 2, found 1
incorrect local backref count on 1859856117760 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb3750
backref disk bytenr does not match extent record, bytenr=1859856117760, ref bytenr=0
backpointer mismatch on [1859856117760 790528]
ref mismatch on [1859856908288 528384] extent item 2, found 1
incorrect local backref count on 1859856908288 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb38e0
backref disk bytenr does not match extent record, bytenr=1859856908288, ref bytenr=0
backpointer mismatch on [1859856908288 528384]
ref mismatch on [1859875659776 528384] extent item 2, found 1
incorrect local backref count on 1859875659776 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb4850
backref disk bytenr does not match extent record, bytenr=1859875659776, ref bytenr=0
backpointer mismatch on [1859875659776 528384]
ref mismatch on [1859876188160 1576960] extent item 2, found 1
incorrect local backref count on 1859876188160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb49e0
backref disk bytenr does not match extent record, bytenr=1859876188160, ref bytenr=0
backpointer mismatch on [1859876188160 1576960]
ref mismatch on [1859877765120 446464] extent item 2, found 1
incorrect local backref count on 1859877765120 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb4b70
backref disk bytenr does not match extent record, bytenr=1859877765120, ref bytenr=0
backpointer mismatch on [1859877765120 446464]
ref mismatch on [1859880390656 462848] extent item 2, found 1
incorrect local backref count on 1859880390656 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb51c0
backref disk bytenr does not match extent record, bytenr=1859880390656, ref bytenr=0
backpointer mismatch on [1859880390656 462848]
ref mismatch on [1859880853504 1052672] extent item 2, found 1
incorrect local backref count on 1859880853504 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb5350
backref disk bytenr does not match extent record, bytenr=1859880853504, ref bytenr=0
backpointer mismatch on [1859880853504 1052672]
ref mismatch on [1859881906176 266240] extent item 2, found 1
incorrect local backref count on 1859881906176 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb54e0
backref disk bytenr does not match extent record, bytenr=1859881906176, ref bytenr=0
backpointer mismatch on [1859881906176 266240]
ref mismatch on [1859897151488 1052672] extent item 2, found 1
incorrect local backref count on 1859897151488 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb72f0
backref disk bytenr does not match extent record, bytenr=1859897151488, ref bytenr=0
backpointer mismatch on [1859897151488 1052672]
ref mismatch on [1859898204160 1052672] extent item 2, found 1
incorrect local backref count on 1859898204160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb7480
backref disk bytenr does not match extent record, bytenr=1859898204160, ref bytenr=0
backpointer mismatch on [1859898204160 1052672]
ref mismatch on [1859899256832 1429504] extent item 2, found 1
incorrect local backref count on 1859899256832 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb7610
backref disk bytenr does not match extent record, bytenr=1859899256832, ref bytenr=0
backpointer mismatch on [1859899256832 1429504]
ref mismatch on [1859905671168 135168] extent item 2, found 1
incorrect local backref count on 1859905671168 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d23ddb7d90
backref disk bytenr does not match extent record, bytenr=1859905671168, ref bytenr=0
backpointer mismatch on [1859905671168 135168]
ref mismatch on [1859983532032 1200128] extent item 2, found 1
incorrect local backref count on 1859983532032 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242081820
backref disk bytenr does not match extent record, bytenr=1859983532032, ref bytenr=0
backpointer mismatch on [1859983532032 1200128]
ref mismatch on [1859984732160 1052672] extent item 2, found 1
incorrect local backref count on 1859984732160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2420819b0
backref disk bytenr does not match extent record, bytenr=1859984732160, ref bytenr=0
backpointer mismatch on [1859984732160 1052672]
ref mismatch on [1859985784832 593920] extent item 2, found 1
incorrect local backref count on 1859985784832 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242081b40
backref disk bytenr does not match extent record, bytenr=1859985784832, ref bytenr=0
backpointer mismatch on [1859985784832 593920]
ref mismatch on [1859986378752 528384] extent item 2, found 1
incorrect local backref count on 1859986378752 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242081cd0
backref disk bytenr does not match extent record, bytenr=1859986378752, ref bytenr=0
backpointer mismatch on [1859986378752 528384]
ref mismatch on [1859986907136 921600] extent item 2, found 1
incorrect local backref count on 1859986907136 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242081e60
backref disk bytenr does not match extent record, bytenr=1859986907136, ref bytenr=0
backpointer mismatch on [1859986907136 921600]
ref mismatch on [1859987828736 364544] extent item 2, found 1
incorrect local backref count on 1859987828736 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242081ff0
backref disk bytenr does not match extent record, bytenr=1859987828736, ref bytenr=0
backpointer mismatch on [1859987828736 364544]
ref mismatch on [1859988193280 790528] extent item 2, found 1
incorrect local backref count on 1859988193280 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242082180
backref disk bytenr does not match extent record, bytenr=1859988193280, ref bytenr=0
backpointer mismatch on [1859988193280 790528]
ref mismatch on [1859988983808 806912] extent item 2, found 1
incorrect local backref count on 1859988983808 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242082310
backref disk bytenr does not match extent record, bytenr=1859988983808, ref bytenr=0
backpointer mismatch on [1859988983808 806912]
ref mismatch on [1859989790720 528384] extent item 2, found 1
incorrect local backref count on 1859989790720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2420824a0
backref disk bytenr does not match extent record, bytenr=1859989790720, ref bytenr=0
backpointer mismatch on [1859989790720 528384]
ref mismatch on [1860031578112 528384] extent item 2, found 1
incorrect local backref count on 1860031578112 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242084640
backref disk bytenr does not match extent record, bytenr=1860031578112, ref bytenr=0
backpointer mismatch on [1860031578112 528384]
ref mismatch on [1860032106496 692224] extent item 2, found 1
incorrect local backref count on 1860032106496 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d2420847d0
backref disk bytenr does not match extent record, bytenr=1860032106496, ref bytenr=0
backpointer mismatch on [1860032106496 692224]
ref mismatch on [1860032798720 266240] extent item 2, found 1
incorrect local backref count on 1860032798720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242084960
backref disk bytenr does not match extent record, bytenr=1860032798720, ref bytenr=0
backpointer mismatch on [1860032798720 266240]
ref mismatch on [1860033064960 1298432] extent item 2, found 1
incorrect local backref count on 1860033064960 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242084af0
backref disk bytenr does not match extent record, bytenr=1860033064960, ref bytenr=0
backpointer mismatch on [1860033064960 1298432]
ref mismatch on [1860034363392 528384] extent item 2, found 1
incorrect local backref count on 1860034363392 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55d242084c80
backref disk bytenr does not match extent record, bytenr=1860034363392, ref bytenr=0
backpointer mismatch on [1860034363392 528384]
ERROR: errors found in extent allocation tree or chunk allocation
[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 2361646501888 bytes used, error(s) found
total csum bytes: 2290006528
total tree bytes: 4879859712
total fs tree bytes: 1846968320
total extent tree bytes: 525336576
btree space waste bytes: 473795024
file data blocks allocated: 2872136884224
 referenced 2574522216448
aio@aio:~$ sudo btrfs check --readonly --force /dev/mapper/SRD7NA1B6-part1
[sudo] password for aio: 
Opening filesystem to check...
WARNING: filesystem mounted, continuing because of --force
Checking filesystem on /dev/mapper/SRD7NA1B6-part1
UUID: 89395c82-5b62-43de-8cf2-1064e18d2b0a
[1/7] checking root items
[2/7] checking extents
ref mismatch on [1749129351168 49152] extent item 2, found 1
incorrect local backref count on 1749129351168 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd6373d970
backref disk bytenr does not match extent record, bytenr=1749129351168, ref bytenr=0
backpointer mismatch on [1749129351168 49152]
ref mismatch on [1846858219520 86016] extent item 2, found 1
incorrect local backref count on 1846858219520 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd695a9ef0
backref disk bytenr does not match extent record, bytenr=1846858219520, ref bytenr=0
backpointer mismatch on [1846858219520 86016]
ref mismatch on [1847212650496 151552] extent item 2, found 1
incorrect local backref count on 1847212650496 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd69e1bf70
backref disk bytenr does not match extent record, bytenr=1847212650496, ref bytenr=0
backpointer mismatch on [1847212650496 151552]
ref mismatch on [1858006818816 53248] extent item 2, found 1
incorrect local backref count on 1858006818816 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63fdbca0
backref disk bytenr does not match extent record, bytenr=1858006818816, ref bytenr=0
backpointer mismatch on [1858006818816 53248]
ref mismatch on [1858046676992 1052672] extent item 2, found 1
incorrect local backref count on 1858046676992 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63fde300
backref disk bytenr does not match extent record, bytenr=1858046676992, ref bytenr=0
backpointer mismatch on [1858046676992 1052672]
ref mismatch on [1858047729664 1052672] extent item 2, found 1
incorrect local backref count on 1858047729664 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63fde490
backref disk bytenr does not match extent record, bytenr=1858047729664, ref bytenr=0
backpointer mismatch on [1858047729664 1052672]
ref mismatch on [1858048782336 528384] extent item 2, found 1
incorrect local backref count on 1858048782336 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63fde620
backref disk bytenr does not match extent record, bytenr=1858048782336, ref bytenr=0
backpointer mismatch on [1858048782336 528384]
ref mismatch on [1858049310720 1052672] extent item 2, found 1
incorrect local backref count on 1858049310720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63fde7b0
backref disk bytenr does not match extent record, bytenr=1858049310720, ref bytenr=0
backpointer mismatch on [1858049310720 1052672]
ref mismatch on [1858065477632 69632] extent item 2, found 1
incorrect local backref count on 1858065477632 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63fdf8b0
backref disk bytenr does not match extent record, bytenr=1858065477632, ref bytenr=0
backpointer mismatch on [1858065477632 69632]
ref mismatch on [1858362576896 528384] extent item 2, found 1
incorrect local backref count on 1858362576896 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63feee80
backref disk bytenr does not match extent record, bytenr=1858362576896, ref bytenr=0
backpointer mismatch on [1858362576896 528384]
ref mismatch on [1858363105280 1052672] extent item 2, found 1
incorrect local backref count on 1858363105280 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63fef010
backref disk bytenr does not match extent record, bytenr=1858363105280, ref bytenr=0
backpointer mismatch on [1858363105280 1052672]
ref mismatch on [1858364157952 774144] extent item 2, found 1
incorrect local backref count on 1858364157952 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63fef1a0
backref disk bytenr does not match extent record, bytenr=1858364157952, ref bytenr=0
backpointer mismatch on [1858364157952 774144]
ref mismatch on [1858669809664 1052672] extent item 2, found 1
incorrect local backref count on 1858669809664 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74309fc0
backref disk bytenr does not match extent record, bytenr=1858669809664, ref bytenr=0
backpointer mismatch on [1858669809664 1052672]
ref mismatch on [1858670862336 266240] extent item 2, found 1
incorrect local backref count on 1858670862336 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7430a150
backref disk bytenr does not match extent record, bytenr=1858670862336, ref bytenr=0
backpointer mismatch on [1858670862336 266240]
ref mismatch on [1858671128576 1052672] extent item 2, found 1
incorrect local backref count on 1858671128576 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7430a2e0
backref disk bytenr does not match extent record, bytenr=1858671128576, ref bytenr=0
backpointer mismatch on [1858671128576 1052672]
ref mismatch on [1858672181248 282624] extent item 2, found 1
incorrect local backref count on 1858672181248 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7430a470
backref disk bytenr does not match extent record, bytenr=1858672181248, ref bytenr=0
backpointer mismatch on [1858672181248 282624]
ref mismatch on [1858672463872 1052672] extent item 2, found 1
incorrect local backref count on 1858672463872 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7430a600
backref disk bytenr does not match extent record, bytenr=1858672463872, ref bytenr=0
backpointer mismatch on [1858672463872 1052672]
ref mismatch on [1859008856064 266240] extent item 2, found 1
incorrect local backref count on 1859008856064 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd640059f0
backref disk bytenr does not match extent record, bytenr=1859008856064, ref bytenr=0
backpointer mismatch on [1859008856064 266240]
ref mismatch on [1859009122304 1052672] extent item 2, found 1
incorrect local backref count on 1859009122304 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd64005b80
backref disk bytenr does not match extent record, bytenr=1859009122304, ref bytenr=0
backpointer mismatch on [1859009122304 1052672]
ref mismatch on [1859092791296 1052672] extent item 2, found 1
incorrect local backref count on 1859092791296 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd63feea80
backref disk bytenr does not match extent record, bytenr=1859092791296, ref bytenr=0
backpointer mismatch on [1859092791296 1052672]
ref mismatch on [1859093843968 790528] extent item 2, found 1
incorrect local backref count on 1859093843968 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd6400d090
backref disk bytenr does not match extent record, bytenr=1859093843968, ref bytenr=0
backpointer mismatch on [1859093843968 790528]
ref mismatch on [1859095433216 2101248] extent item 2, found 1
incorrect local backref count on 1859095433216 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd6400da70
backref disk bytenr does not match extent record, bytenr=1859095433216, ref bytenr=0
backpointer mismatch on [1859095433216 2101248]
ref mismatch on [1859097534464 790528] extent item 2, found 1
incorrect local backref count on 1859097534464 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd6400dc00
backref disk bytenr does not match extent record, bytenr=1859097534464, ref bytenr=0
backpointer mismatch on [1859097534464 790528]
ref mismatch on [1859593400320 1052672] extent item 2, found 1
incorrect local backref count on 1859593400320 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd745125f0
backref disk bytenr does not match extent record, bytenr=1859593400320, ref bytenr=0
backpointer mismatch on [1859593400320 1052672]
ref mismatch on [1859757731840 774144] extent item 2, found 1
incorrect local backref count on 1859757731840 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd6405b8e0
backref disk bytenr does not match extent record, bytenr=1859757731840, ref bytenr=0
backpointer mismatch on [1859757731840 774144]
ref mismatch on [1859771207680 20480] extent item 2, found 1
incorrect local backref count on 1859771207680 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd6405c520
backref disk bytenr does not match extent record, bytenr=1859771207680, ref bytenr=0
backpointer mismatch on [1859771207680 20480]
ref mismatch on [1859777302528 413696] extent item 2, found 1
incorrect local backref count on 1859777302528 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7006bca0
backref disk bytenr does not match extent record, bytenr=1859777302528, ref bytenr=0
backpointer mismatch on [1859777302528 413696]
ref mismatch on [1859823501312 643072] extent item 2, found 1
incorrect local backref count on 1859823501312 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7006de40
backref disk bytenr does not match extent record, bytenr=1859823501312, ref bytenr=0
backpointer mismatch on [1859823501312 643072]
ref mismatch on [1859829854208 528384] extent item 2, found 1
incorrect local backref count on 1859829854208 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7006e6f0
backref disk bytenr does not match extent record, bytenr=1859829854208, ref bytenr=0
backpointer mismatch on [1859829854208 528384]
ref mismatch on [1859852173312 528384] extent item 2, found 1
incorrect local backref count on 1859852173312 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7006fcb0
backref disk bytenr does not match extent record, bytenr=1859852173312, ref bytenr=0
backpointer mismatch on [1859852173312 528384]
ref mismatch on [1859852701696 610304] extent item 2, found 1
incorrect local backref count on 1859852701696 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7006fe40
backref disk bytenr does not match extent record, bytenr=1859852701696, ref bytenr=0
backpointer mismatch on [1859852701696 610304]
ref mismatch on [1859853312000 1052672] extent item 2, found 1
incorrect local backref count on 1859853312000 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd7006ffd0
backref disk bytenr does not match extent record, bytenr=1859853312000, ref bytenr=0
backpointer mismatch on [1859853312000 1052672]
ref mismatch on [1859856117760 790528] extent item 2, found 1
incorrect local backref count on 1859856117760 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd70070620
backref disk bytenr does not match extent record, bytenr=1859856117760, ref bytenr=0
backpointer mismatch on [1859856117760 790528]
ref mismatch on [1859856908288 528384] extent item 2, found 1
incorrect local backref count on 1859856908288 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd700707b0
backref disk bytenr does not match extent record, bytenr=1859856908288, ref bytenr=0
backpointer mismatch on [1859856908288 528384]
ref mismatch on [1859875659776 528384] extent item 2, found 1
incorrect local backref count on 1859875659776 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd700718b0
backref disk bytenr does not match extent record, bytenr=1859875659776, ref bytenr=0
backpointer mismatch on [1859875659776 528384]
ref mismatch on [1859876188160 1576960] extent item 2, found 1
incorrect local backref count on 1859876188160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd70071a40
backref disk bytenr does not match extent record, bytenr=1859876188160, ref bytenr=0
backpointer mismatch on [1859876188160 1576960]
ref mismatch on [1859877765120 446464] extent item 2, found 1
incorrect local backref count on 1859877765120 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd70071bd0
backref disk bytenr does not match extent record, bytenr=1859877765120, ref bytenr=0
backpointer mismatch on [1859877765120 446464]
ref mismatch on [1859880390656 462848] extent item 2, found 1
incorrect local backref count on 1859880390656 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd70072220
backref disk bytenr does not match extent record, bytenr=1859880390656, ref bytenr=0
backpointer mismatch on [1859880390656 462848]
ref mismatch on [1859880853504 1052672] extent item 2, found 1
incorrect local backref count on 1859880853504 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd700723b0
backref disk bytenr does not match extent record, bytenr=1859880853504, ref bytenr=0
backpointer mismatch on [1859880853504 1052672]
ref mismatch on [1859881906176 266240] extent item 2, found 1
incorrect local backref count on 1859881906176 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd70072540
backref disk bytenr does not match extent record, bytenr=1859881906176, ref bytenr=0
backpointer mismatch on [1859881906176 266240]
ref mismatch on [1859897151488 1052672] extent item 2, found 1
incorrect local backref count on 1859897151488 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd70074350
backref disk bytenr does not match extent record, bytenr=1859897151488, ref bytenr=0
backpointer mismatch on [1859897151488 1052672]
ref mismatch on [1859898204160 1052672] extent item 2, found 1
incorrect local backref count on 1859898204160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd700744e0
backref disk bytenr does not match extent record, bytenr=1859898204160, ref bytenr=0
backpointer mismatch on [1859898204160 1052672]
ref mismatch on [1859899256832 1429504] extent item 2, found 1
incorrect local backref count on 1859899256832 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd70074670
backref disk bytenr does not match extent record, bytenr=1859899256832, ref bytenr=0
backpointer mismatch on [1859899256832 1429504]
ref mismatch on [1859905671168 135168] extent item 2, found 1
incorrect local backref count on 1859905671168 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd70074df0
backref disk bytenr does not match extent record, bytenr=1859905671168, ref bytenr=0
backpointer mismatch on [1859905671168 135168]
ref mismatch on [1859983532032 1200128] extent item 2, found 1
incorrect local backref count on 1859983532032 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74311620
backref disk bytenr does not match extent record, bytenr=1859983532032, ref bytenr=0
backpointer mismatch on [1859983532032 1200128]
ref mismatch on [1859984732160 1052672] extent item 2, found 1
incorrect local backref count on 1859984732160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd743117b0
backref disk bytenr does not match extent record, bytenr=1859984732160, ref bytenr=0
backpointer mismatch on [1859984732160 1052672]
ref mismatch on [1859985784832 593920] extent item 2, found 1
incorrect local backref count on 1859985784832 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74311940
backref disk bytenr does not match extent record, bytenr=1859985784832, ref bytenr=0
backpointer mismatch on [1859985784832 593920]
ref mismatch on [1859986378752 528384] extent item 2, found 1
incorrect local backref count on 1859986378752 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74311ad0
backref disk bytenr does not match extent record, bytenr=1859986378752, ref bytenr=0
backpointer mismatch on [1859986378752 528384]
ref mismatch on [1859986907136 921600] extent item 2, found 1
incorrect local backref count on 1859986907136 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74311c60
backref disk bytenr does not match extent record, bytenr=1859986907136, ref bytenr=0
backpointer mismatch on [1859986907136 921600]
ref mismatch on [1859987828736 364544] extent item 2, found 1
incorrect local backref count on 1859987828736 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74311df0
backref disk bytenr does not match extent record, bytenr=1859987828736, ref bytenr=0
backpointer mismatch on [1859987828736 364544]
ref mismatch on [1859988193280 790528] extent item 2, found 1
incorrect local backref count on 1859988193280 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74311f80
backref disk bytenr does not match extent record, bytenr=1859988193280, ref bytenr=0
backpointer mismatch on [1859988193280 790528]
ref mismatch on [1859988983808 806912] extent item 2, found 1
incorrect local backref count on 1859988983808 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74312110
backref disk bytenr does not match extent record, bytenr=1859988983808, ref bytenr=0
backpointer mismatch on [1859988983808 806912]
ref mismatch on [1859989790720 528384] extent item 2, found 1
incorrect local backref count on 1859989790720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd743122a0
backref disk bytenr does not match extent record, bytenr=1859989790720, ref bytenr=0
backpointer mismatch on [1859989790720 528384]
ref mismatch on [1860031578112 528384] extent item 2, found 1
incorrect local backref count on 1860031578112 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74314440
backref disk bytenr does not match extent record, bytenr=1860031578112, ref bytenr=0
backpointer mismatch on [1860031578112 528384]
ref mismatch on [1860032106496 692224] extent item 2, found 1
incorrect local backref count on 1860032106496 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd743145d0
backref disk bytenr does not match extent record, bytenr=1860032106496, ref bytenr=0
backpointer mismatch on [1860032106496 692224]
ref mismatch on [1860032798720 266240] extent item 2, found 1
incorrect local backref count on 1860032798720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74314760
backref disk bytenr does not match extent record, bytenr=1860032798720, ref bytenr=0
backpointer mismatch on [1860032798720 266240]
ref mismatch on [1860033064960 1298432] extent item 2, found 1
incorrect local backref count on 1860033064960 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd743148f0
backref disk bytenr does not match extent record, bytenr=1860033064960, ref bytenr=0
backpointer mismatch on [1860033064960 1298432]
ref mismatch on [1860034363392 528384] extent item 2, found 1
incorrect local backref count on 1860034363392 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55fd74314a80
backref disk bytenr does not match extent record, bytenr=1860034363392, ref bytenr=0
backpointer mismatch on [1860034363392 528384]
ERROR: errors found in extent allocation tree or chunk allocation
[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 2361645871104 bytes used, error(s) found
total csum bytes: 2290006296
total tree bytes: 4879466496
total fs tree bytes: 1846575104
total extent tree bytes: 525336576
btree space waste bytes: 473754567
file data blocks allocated: 2859651485696
 referenced 2562038353920

aio@aio:~$ sudo ddrescue -n /dev/mapper/SRD7NA1B6 /ZFS3WAY/nosnapshot/SRD7NA1B6.img /ZFS3WAY/nosnapshot/SRD7NA1B6.log 
[sudo] password for aio: 
GNU ddrescue 1.23
Press Ctrl-C to interrupt
     ipos:    3000 GB, non-trimmed:        0 B,  current rate:  53829 kB/s
     opos:    3000 GB, non-scraped:        0 B,  average rate:    105 MB/s
non-tried:        0 B,  bad-sector:        0 B,    error rate:       0 B/s
  rescued:    3000 GB,   bad areas:        0,        run time:  7h 55m 55s
pct rescued:  100.00%, read errors:        0,  remaining time:         n/a
                              time since last successful read:         n/a
Finished                                     

aio@aio:~$ sudo btrfs scrub start /dev/mapper/SRD7NA1B6-part1
scrub started on /dev/mapper/SRD7NA1B6-part1, fsid 89395c82-5b62-43de-8cf2-1064e18d2b0a (pid=2653347)
aio@aio:~$ sudo btrfs scrub status /dev/mapper/SRD7NA1B6-part1
UUID:             89395c82-5b62-43de-8cf2-1064e18d2b0a
Scrub started:    Tue Sep 20 06:46:06 2022
Status:           running
Duration:         0:00:10
Time left:        6:14:21
ETA:              Tue Sep 20 13:00:40 2022
Total to scrub:   2.15TiB
Bytes scrubbed:   1004.33MiB  (0.04%)
Rate:             100.43MiB/s
Error summary:    no errors found
aio@aio:~$ sudo btrfs scrub status /dev/mapper/SRD7NA1B6-part1
[sudo] password for aio: 
UUID:             89395c82-5b62-43de-8cf2-1064e18d2b0a
Scrub started:    Tue Sep 20 06:46:06 2022
Status:           finished
Duration:         5:14:38
Total to scrub:   2.15TiB
Rate:             119.55MiB/s
Error summary:    no errors found

aio@aio:~$ sudo btrfs check --readonly --force /dev/mapper/SRD7NA1B6-part1
Opening filesystem to check...
WARNING: filesystem mounted, continuing because of --force
Checking filesystem on /dev/mapper/SRD7NA1B6-part1
UUID: 89395c82-5b62-43de-8cf2-1064e18d2b0a
[1/7] checking root items
[2/7] checking extents
ref mismatch on [1749129351168 49152] extent item 2, found 1
incorrect local backref count on 1749129351168 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fa9c5210
backref disk bytenr does not match extent record, bytenr=1749129351168, ref bytenr=0
backpointer mismatch on [1749129351168 49152]
ref mismatch on [1846858219520 86016] extent item 2, found 1
incorrect local backref count on 1846858219520 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a500f2e3b0
backref disk bytenr does not match extent record, bytenr=1846858219520, ref bytenr=0
backpointer mismatch on [1846858219520 86016]
ref mismatch on [1847212650496 151552] extent item 2, found 1
incorrect local backref count on 1847212650496 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a5014bb8c0
backref disk bytenr does not match extent record, bytenr=1847212650496, ref bytenr=0
backpointer mismatch on [1847212650496 151552]
ref mismatch on [1858006818816 53248] extent item 2, found 1
incorrect local backref count on 1858006818816 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2a7b80
backref disk bytenr does not match extent record, bytenr=1858006818816, ref bytenr=0
backpointer mismatch on [1858006818816 53248]
ref mismatch on [1858046676992 1052672] extent item 2, found 1
incorrect local backref count on 1858046676992 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2aa1e0
backref disk bytenr does not match extent record, bytenr=1858046676992, ref bytenr=0
backpointer mismatch on [1858046676992 1052672]
ref mismatch on [1858047729664 1052672] extent item 2, found 1
incorrect local backref count on 1858047729664 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2aa370
backref disk bytenr does not match extent record, bytenr=1858047729664, ref bytenr=0
backpointer mismatch on [1858047729664 1052672]
ref mismatch on [1858048782336 528384] extent item 2, found 1
incorrect local backref count on 1858048782336 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2aa500
backref disk bytenr does not match extent record, bytenr=1858048782336, ref bytenr=0
backpointer mismatch on [1858048782336 528384]
ref mismatch on [1858049310720 1052672] extent item 2, found 1
incorrect local backref count on 1858049310720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2aa690
backref disk bytenr does not match extent record, bytenr=1858049310720, ref bytenr=0
backpointer mismatch on [1858049310720 1052672]
ref mismatch on [1858065477632 69632] extent item 2, found 1
incorrect local backref count on 1858065477632 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2ab790
backref disk bytenr does not match extent record, bytenr=1858065477632, ref bytenr=0
backpointer mismatch on [1858065477632 69632]
ref mismatch on [1858362576896 528384] extent item 2, found 1
incorrect local backref count on 1858362576896 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2bad60
backref disk bytenr does not match extent record, bytenr=1858362576896, ref bytenr=0
backpointer mismatch on [1858362576896 528384]
ref mismatch on [1858363105280 1052672] extent item 2, found 1
incorrect local backref count on 1858363105280 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2baef0
backref disk bytenr does not match extent record, bytenr=1858363105280, ref bytenr=0
backpointer mismatch on [1858363105280 1052672]
ref mismatch on [1858364157952 774144] extent item 2, found 1
incorrect local backref count on 1858364157952 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2bb080
backref disk bytenr does not match extent record, bytenr=1858364157952, ref bytenr=0
backpointer mismatch on [1858364157952 774144]
ref mismatch on [1858669809664 1052672] extent item 2, found 1
incorrect local backref count on 1858669809664 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1d7750
backref disk bytenr does not match extent record, bytenr=1858669809664, ref bytenr=0
backpointer mismatch on [1858669809664 1052672]
ref mismatch on [1858670862336 266240] extent item 2, found 1
incorrect local backref count on 1858670862336 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1d78e0
backref disk bytenr does not match extent record, bytenr=1858670862336, ref bytenr=0
backpointer mismatch on [1858670862336 266240]
ref mismatch on [1858671128576 1052672] extent item 2, found 1
incorrect local backref count on 1858671128576 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1d7a70
backref disk bytenr does not match extent record, bytenr=1858671128576, ref bytenr=0
backpointer mismatch on [1858671128576 1052672]
ref mismatch on [1858672181248 282624] extent item 2, found 1
incorrect local backref count on 1858672181248 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1d7c00
backref disk bytenr does not match extent record, bytenr=1858672181248, ref bytenr=0
backpointer mismatch on [1858672181248 282624]
ref mismatch on [1858672463872 1052672] extent item 2, found 1
incorrect local backref count on 1858672463872 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1d7d90
backref disk bytenr does not match extent record, bytenr=1858672463872, ref bytenr=0
backpointer mismatch on [1858672463872 1052672]
ref mismatch on [1859008856064 266240] extent item 2, found 1
incorrect local backref count on 1859008856064 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2d18d0
backref disk bytenr does not match extent record, bytenr=1859008856064, ref bytenr=0
backpointer mismatch on [1859008856064 266240]
ref mismatch on [1859009122304 1052672] extent item 2, found 1
incorrect local backref count on 1859009122304 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2d1a60
backref disk bytenr does not match extent record, bytenr=1859009122304, ref bytenr=0
backpointer mismatch on [1859009122304 1052672]
ref mismatch on [1859092791296 1052672] extent item 2, found 1
incorrect local backref count on 1859092791296 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2d8f10
backref disk bytenr does not match extent record, bytenr=1859092791296, ref bytenr=0
backpointer mismatch on [1859092791296 1052672]
ref mismatch on [1859093843968 790528] extent item 2, found 1
incorrect local backref count on 1859093843968 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2d90a0
backref disk bytenr does not match extent record, bytenr=1859093843968, ref bytenr=0
backpointer mismatch on [1859093843968 790528]
ref mismatch on [1859095433216 2101248] extent item 2, found 1
incorrect local backref count on 1859095433216 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2d9a80
backref disk bytenr does not match extent record, bytenr=1859095433216, ref bytenr=0
backpointer mismatch on [1859095433216 2101248]
ref mismatch on [1859097534464 790528] extent item 2, found 1
incorrect local backref count on 1859097534464 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb2d9c10
backref disk bytenr does not match extent record, bytenr=1859097534464, ref bytenr=0
backpointer mismatch on [1859097534464 790528]
ref mismatch on [1859593400320 1052672] extent item 2, found 1
incorrect local backref count on 1859593400320 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b3dfd80
backref disk bytenr does not match extent record, bytenr=1859593400320, ref bytenr=0
backpointer mismatch on [1859593400320 1052672]
ref mismatch on [1859757731840 774144] extent item 2, found 1
incorrect local backref count on 1859757731840 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb318c60
backref disk bytenr does not match extent record, bytenr=1859757731840, ref bytenr=0
backpointer mismatch on [1859757731840 774144]
ref mismatch on [1859771207680 20480] extent item 2, found 1
incorrect local backref count on 1859771207680 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a4fb3198a0
backref disk bytenr does not match extent record, bytenr=1859771207680, ref bytenr=0
backpointer mismatch on [1859771207680 20480]
ref mismatch on [1859777302528 413696] extent item 2, found 1
incorrect local backref count on 1859777302528 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea2ab0
backref disk bytenr does not match extent record, bytenr=1859777302528, ref bytenr=0
backpointer mismatch on [1859777302528 413696]
ref mismatch on [1859823501312 643072] extent item 2, found 1
incorrect local backref count on 1859823501312 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea4c50
backref disk bytenr does not match extent record, bytenr=1859823501312, ref bytenr=0
backpointer mismatch on [1859823501312 643072]
ref mismatch on [1859829854208 528384] extent item 2, found 1
incorrect local backref count on 1859829854208 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea5500
backref disk bytenr does not match extent record, bytenr=1859829854208, ref bytenr=0
backpointer mismatch on [1859829854208 528384]
ref mismatch on [1859852173312 528384] extent item 2, found 1
incorrect local backref count on 1859852173312 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea6ac0
backref disk bytenr does not match extent record, bytenr=1859852173312, ref bytenr=0
backpointer mismatch on [1859852173312 528384]
ref mismatch on [1859852701696 610304] extent item 2, found 1
incorrect local backref count on 1859852701696 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea6c50
backref disk bytenr does not match extent record, bytenr=1859852701696, ref bytenr=0
backpointer mismatch on [1859852701696 610304]
ref mismatch on [1859853312000 1052672] extent item 2, found 1
incorrect local backref count on 1859853312000 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea6de0
backref disk bytenr does not match extent record, bytenr=1859853312000, ref bytenr=0
backpointer mismatch on [1859853312000 1052672]
ref mismatch on [1859856117760 790528] extent item 2, found 1
incorrect local backref count on 1859856117760 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea7430
backref disk bytenr does not match extent record, bytenr=1859856117760, ref bytenr=0
backpointer mismatch on [1859856117760 790528]
ref mismatch on [1859856908288 528384] extent item 2, found 1
incorrect local backref count on 1859856908288 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea75c0
backref disk bytenr does not match extent record, bytenr=1859856908288, ref bytenr=0
backpointer mismatch on [1859856908288 528384]
ref mismatch on [1859875659776 528384] extent item 2, found 1
incorrect local backref count on 1859875659776 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea86c0
backref disk bytenr does not match extent record, bytenr=1859875659776, ref bytenr=0
backpointer mismatch on [1859875659776 528384]
ref mismatch on [1859876188160 1576960] extent item 2, found 1
incorrect local backref count on 1859876188160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea8850
backref disk bytenr does not match extent record, bytenr=1859876188160, ref bytenr=0
backpointer mismatch on [1859876188160 1576960]
ref mismatch on [1859877765120 446464] extent item 2, found 1
incorrect local backref count on 1859877765120 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea89e0
backref disk bytenr does not match extent record, bytenr=1859877765120, ref bytenr=0
backpointer mismatch on [1859877765120 446464]
ref mismatch on [1859880390656 462848] extent item 2, found 1
incorrect local backref count on 1859880390656 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea9030
backref disk bytenr does not match extent record, bytenr=1859880390656, ref bytenr=0
backpointer mismatch on [1859880390656 462848]
ref mismatch on [1859880853504 1052672] extent item 2, found 1
incorrect local backref count on 1859880853504 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea91c0
backref disk bytenr does not match extent record, bytenr=1859880853504, ref bytenr=0
backpointer mismatch on [1859880853504 1052672]
ref mismatch on [1859881906176 266240] extent item 2, found 1
incorrect local backref count on 1859881906176 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506ea9350
backref disk bytenr does not match extent record, bytenr=1859881906176, ref bytenr=0
backpointer mismatch on [1859881906176 266240]
ref mismatch on [1859897151488 1052672] extent item 2, found 1
incorrect local backref count on 1859897151488 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a504756a60
backref disk bytenr does not match extent record, bytenr=1859897151488, ref bytenr=0
backpointer mismatch on [1859897151488 1052672]
ref mismatch on [1859898204160 1052672] extent item 2, found 1
incorrect local backref count on 1859898204160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506eab1d0
backref disk bytenr does not match extent record, bytenr=1859898204160, ref bytenr=0
backpointer mismatch on [1859898204160 1052672]
ref mismatch on [1859899256832 1429504] extent item 2, found 1
incorrect local backref count on 1859899256832 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506eab360
backref disk bytenr does not match extent record, bytenr=1859899256832, ref bytenr=0
backpointer mismatch on [1859899256832 1429504]
ref mismatch on [1859905671168 135168] extent item 2, found 1
incorrect local backref count on 1859905671168 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a506eabae0
backref disk bytenr does not match extent record, bytenr=1859905671168, ref bytenr=0
backpointer mismatch on [1859905671168 135168]
ref mismatch on [1859983532032 1200128] extent item 2, found 1
incorrect local backref count on 1859983532032 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1dedb0
backref disk bytenr does not match extent record, bytenr=1859983532032, ref bytenr=0
backpointer mismatch on [1859983532032 1200128]
ref mismatch on [1859984732160 1052672] extent item 2, found 1
incorrect local backref count on 1859984732160 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1def40
backref disk bytenr does not match extent record, bytenr=1859984732160, ref bytenr=0
backpointer mismatch on [1859984732160 1052672]
ref mismatch on [1859985784832 593920] extent item 2, found 1
incorrect local backref count on 1859985784832 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1df0d0
backref disk bytenr does not match extent record, bytenr=1859985784832, ref bytenr=0
backpointer mismatch on [1859985784832 593920]
ref mismatch on [1859986378752 528384] extent item 2, found 1
incorrect local backref count on 1859986378752 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1df260
backref disk bytenr does not match extent record, bytenr=1859986378752, ref bytenr=0
backpointer mismatch on [1859986378752 528384]
ref mismatch on [1859986907136 921600] extent item 2, found 1
incorrect local backref count on 1859986907136 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1df3f0
backref disk bytenr does not match extent record, bytenr=1859986907136, ref bytenr=0
backpointer mismatch on [1859986907136 921600]
ref mismatch on [1859987828736 364544] extent item 2, found 1
incorrect local backref count on 1859987828736 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1df580
backref disk bytenr does not match extent record, bytenr=1859987828736, ref bytenr=0
backpointer mismatch on [1859987828736 364544]
ref mismatch on [1859988193280 790528] extent item 2, found 1
incorrect local backref count on 1859988193280 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1df710
backref disk bytenr does not match extent record, bytenr=1859988193280, ref bytenr=0
backpointer mismatch on [1859988193280 790528]
ref mismatch on [1859988983808 806912] extent item 2, found 1
incorrect local backref count on 1859988983808 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1df8a0
backref disk bytenr does not match extent record, bytenr=1859988983808, ref bytenr=0
backpointer mismatch on [1859988983808 806912]
ref mismatch on [1859989790720 528384] extent item 2, found 1
incorrect local backref count on 1859989790720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1dfa30
backref disk bytenr does not match extent record, bytenr=1859989790720, ref bytenr=0
backpointer mismatch on [1859989790720 528384]
ref mismatch on [1860031578112 528384] extent item 2, found 1
incorrect local backref count on 1860031578112 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1e1bd0
backref disk bytenr does not match extent record, bytenr=1860031578112, ref bytenr=0
backpointer mismatch on [1860031578112 528384]
ref mismatch on [1860032106496 692224] extent item 2, found 1
incorrect local backref count on 1860032106496 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1e1d60
backref disk bytenr does not match extent record, bytenr=1860032106496, ref bytenr=0
backpointer mismatch on [1860032106496 692224]
ref mismatch on [1860032798720 266240] extent item 2, found 1
incorrect local backref count on 1860032798720 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1e1ef0
backref disk bytenr does not match extent record, bytenr=1860032798720, ref bytenr=0
backpointer mismatch on [1860032798720 266240]
ref mismatch on [1860033064960 1298432] extent item 2, found 1
incorrect local backref count on 1860033064960 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1e2080
backref disk bytenr does not match extent record, bytenr=1860033064960, ref bytenr=0
backpointer mismatch on [1860033064960 1298432]
ref mismatch on [1860034363392 528384] extent item 2, found 1
incorrect local backref count on 1860034363392 parent 855328849920 owner 0 offset 0 found 0 wanted 1 back 0x55a50b1e2210
backref disk bytenr does not match extent record, bytenr=1860034363392, ref bytenr=0
backpointer mismatch on [1860034363392 528384]
ERROR: errors found in extent allocation tree or chunk allocation
[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 2361646100480 bytes used, error(s) found
total csum bytes: 2290006296
total tree bytes: 4879695872
total fs tree bytes: 1846788096
total extent tree bytes: 525352960
btree space waste bytes: 473782417
file data blocks allocated: 2859651485696
 referenced 2562038353920
aio@aio:~$ 

~~~

[adam900710]

btrfs check with --force option and mounted fs is known to cause false alerts due to the nature of mounted fs.

I strongly think this is just a false alert, and if you really want to run check with mounted fs, please at least mount the target fs RO.
The most accurate way is using btrfs check from a liveCD.

[kdave]

There is another check report that uses --force and reports some problems on a mounted filesystem, I think we should make the warning more verbose and explain what could happen.