From: Konstantin Svist <fry.kun@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: Restoring a file from damaged btrfs raid1 shard
Date: Wed, 21 Apr 2021 20:24:13 -0700 [thread overview]
Message-ID: <9ca589ec-26b1-1b92-fe4a-af9006e516c6@gmail.com> (raw)
Hi,
I have a drive which I replaced from a raid1 pair (caused a lot of
command timeouts).
Before I pulled it, I forgot to check if there are any files not
properly stored in the other copy.
The file is quite old, so the recent changes on the partition don't matter
#uname -a
Linux xx 5.11.12-200.fc33.x86_64 #1 SMP Thu Apr 8 02:34:17 UTC 2021
x86_64 x86_64 x86_64 GNU/Linux
# btrfs --version
btrfs-progs v5.10
# mount -oro,degraded /dev/sdb3 /mnt/
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/sdb3,
missing codepage or helper program, or other error.
Apr 21 20:21:11 xx kernel: BTRFS info (device sdb3): allowing degraded
mounts
Apr 21 20:21:11 xx kernel: BTRFS info (device sdb3): disk space caching
is enabled
Apr 21 20:21:11 xx kernel: BTRFS info (device sdb3): has skinny extents
Apr 21 20:21:11 xx kernel: BTRFS warning (device sdb3): devid 3 uuid
8c5ca74b-83fd-4625-92f0-ec14ef64b0a8 is missing
Apr 21 20:21:11 xx kernel: BTRFS warning (device sdb3): devid 4 uuid
ff2c7128-b213-402f-a487-fb070ab8e902 is missing
Apr 21 20:21:11 xx kernel: BTRFS info (device sdb3): bdev /dev/sdb3
errs: wr 189563, rd 4799, flush 0, corrupt 2389, gen 0
Apr 21 20:21:11 xx kernel: BTRFS info (device sdb3): bdev (efault) errs:
wr 0, rd 0, flush 0, corrupt 35, gen 0
Apr 21 20:21:11 xx kernel: BTRFS info (device sdb3): bdev (efault) errs:
wr 348, rd 0, flush 0, corrupt 0, gen 0
Apr 21 20:21:11 xx kernel: BTRFS error (device sdb3): parent transid
verify failed on 4883446087680 wanted 5857871 found 5852153
Apr 21 20:21:11 xx kernel: BTRFS error (device sdb3): failed to read
block groups: -5
Apr 21 20:21:11 xx kernel: BTRFS error (device sdb3): open_ctree failed
# btrfs fi show /dev/sdb3
warning, device 3 is missing
warning, device 3 is missing
parent transid verify failed on 4883446087680 wanted 5857871 found 5852153
parent transid verify failed on 4883446087680 wanted 5857871 found 5852153
Ignoring transid failure
leaf parent key incorrect 4883446087680
ERROR: failed to read block groups: Operation not permitted
Label: none uuid: fef6d003-b7a5-4e9e-9875-5774052ce2ed
Total devices 3 FS bytes used 614.46GiB
devid 1 size 929.51GiB used 666.03GiB path /dev/sdb3
*** Some devices missing
# btrfs-find-root /dev/sdb3
warning, device 3 is missing
warning, device 3 is missing
parent transid verify failed on 4883446087680 wanted 5857871 found 5852153
parent transid verify failed on 4883446087680 wanted 5857871 found 5852153
Ignoring transid failure
leaf parent key incorrect 4883446087680
ERROR: failed to read block groups: Operation not permitted
Superblock thinks the generation is 5857883
Superblock thinks the level is 1
Found tree root at 4883439714304 gen 5857883 level 1
Well block 4883437158400(gen: 5857882 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883434635264(gen: 5857881 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883426295808(gen: 5857880 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883417972736(gen: 5857879 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883409846272(gen: 5857878 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883352633344(gen: 5857877 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883347685376(gen: 5857876 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883343622144(gen: 5857875 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883438944256(gen: 5857870 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883439239168(gen: 5857869 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883377176576(gen: 5857824 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883357188096(gen: 5857788 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883340165120(gen: 5857732 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883371884544(gen: 5857731 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883361087488(gen: 5857730 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883380404224(gen: 5857729 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883374358528(gen: 5857727 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883342721024(gen: 5857718 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883398656000(gen: 5857713 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883346784256(gen: 5857706 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883409584128(gen: 5857704 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883436666880(gen: 5857439 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883436650496(gen: 5857439 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883436290048(gen: 5857439 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883436126208(gen: 5857439 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883387858944(gen: 5857438 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883371753472(gen: 5857437 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883428802560(gen: 5855304 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883428786176(gen: 5855304 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883411075072(gen: 5855303 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883411042304(gen: 5855299 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883388497920(gen: 5855299 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883428999168(gen: 5855293 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883431686144(gen: 5855262 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883417563136(gen: 5855256 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883416678400(gen: 5855256 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883408601088(gen: 5855254 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883394183168(gen: 5855253 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883394166784(gen: 5855253 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883388792832(gen: 5855253 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883431817216(gen: 5852142 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883373441024(gen: 5852073 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883366723584(gen: 5852070 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883363430400(gen: 5778963 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883363758080(gen: 5778927 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883363627008(gen: 5775596 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883363594240(gen: 5775596 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883361841152(gen: 5775596 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883362332672(gen: 5772011 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883362217984(gen: 5772011 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883362168832(gen: 5772011 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883357614080(gen: 5742160 level: 0) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
Well block 4883344556032(gen: 5701778 level: 1) seems good, but
generation/level doesn't match, want gen: 5857883 level: 1
next reply other threads:[~2021-04-22 3:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-22 3:24 Konstantin Svist [this message]
2021-04-24 19:46 ` Restoring a file from damaged btrfs raid1 shard Chris Murphy
2021-04-25 6:42 ` Konstantin Svist
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