All:
I came back to my computer yesterday to find my filesystem in read only
mode. Running a btrfs scrub start -dB aborts as follows:
btrfs scrub start -dB /mnt
ERROR: scrubbing /mnt failed for device id 4: ret=-1, errno=5
(Input/output error)
ERROR: scrubbing /mnt failed for device id 5: ret=-1, errno=5
(Input/output error)
scrub device /dev/sdb (id 4) canceled
scrub started at Mon Oct 2 21:51:46 2017 and was aborted after
00:09:02
total bytes scrubbed: 75.58GiB with 1 errors
error details: csum=1
corrected errors: 0, uncorrectable errors: 1, unverified errors: 0
scrub device /dev/sdc (id 5) canceled
scrub started at Mon Oct 2 21:51:46 2017 and was aborted after
00:11:11
total bytes scrubbed: 50.75GiB with 0 errors
The resulting dmesg is:
[ 699.534066] BTRFS error (device sdc): bdev /dev/sdb errs: wr 0, rd 0,
flush 0, corrupt 6, gen 0
[ 699.703045] BTRFS error (device sdc): unable to fixup (regular) error
at logical 1609808347136 on dev /dev/sdb
[ 783.306525] BTRFS critical (device sdc): corrupt leaf, bad key order:
block=2589782867968, root=1, slot=116
[ 789.776132] BTRFS critical (device sdc): corrupt leaf, bad key order:
block=2589782867968, root=1, slot=116
[ 911.529842] BTRFS critical (device sdc): corrupt leaf, bad key order:
block=2589782867968, root=1, slot=116
[ 918.365225] BTRFS critical (device sdc): corrupt leaf, bad key order:
block=2589782867968, root=1, slot=116
Running btrfs check /dev/sdc results in:
btrfs check /dev/sdc
Checking filesystem on /dev/sdc
UUID: 24b768c3-2141-44bf-ae93-1c3833c8c8e3
checking extents
bad key ordering 116 117
bad block 2589782867968
ERROR: errors found in extent allocation tree or chunk allocation
checking free space cache
There is no free space entry for 1623012450304-1623012663296
There is no free space entry for 1623012450304-1623225008128
cache appears valid but isn't 1622151266304
found 288815742976 bytes used err is -22
total csum bytes: 0
total tree bytes: 350781440
total fs tree bytes: 0
total extent tree bytes: 350027776
btree space waste bytes: 115829777
file data blocks allocated: 156499968
uname -a:
Linux sysresccd 4.9.24-std500-amd64 #2 SMP Sat Apr 22 17:14:43 UTC 2017
x86_64 Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz GenuineIntel GNU/Linux
btrfs --version: btrfs-progs v4.9.1
btrfs fi show:
Label: none uuid: 24b768c3-2141-44bf-ae93-1c3833c8c8e3
Total devices 2 FS bytes used 475.08GiB
devid 4 size 931.51GiB used 612.06GiB path /dev/sdb
devid 5 size 931.51GiB used 613.09GiB path /dev/sdc
btrfs fi df /mnt:
Data, RAID1: total=603.00GiB, used=468.03GiB
System, RAID1: total=64.00MiB, used=112.00KiB
System, single: total=32.00MiB, used=0.00B
Metadata, RAID1: total=9.00GiB, used=7.04GiB
Metadata, single: total=1.00GiB, used=0.00B
GlobalReserve, single: total=512.00MiB, used=0.00B
What is the recommended procedure at this point? Run btrfs check
--repair? I have backups so losing a file or two isn't critical, but I
really don't want to go through the effort of a bare metal reinstall.
In the process of researching this I did uncover a bad DIMM. Am I
correct that the problems I'm seeing are likely linked to the resulting
memory errors.
Thx in advance,
-steve
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