From: Qu Wenruo <quwenruo@cn.fujitsu.com>
To: Tom Hunt <tomdicksonhunt@gmail.com>
Cc: <linux-btrfs@vger.kernel.org>
Subject: Re: Recovery of a raid1 FS
Date: Fri, 8 Jan 2016 09:48:58 +0800 [thread overview]
Message-ID: <568F158A.30601@cn.fujitsu.com> (raw)
In-Reply-To: <CANevpVjvvcQJPWd5oTGuSZ-hLe9Ca89GbkDHUpPq_Aqxn-JjSQ@mail.gmail.com>
Tom Hunt wrote on 2016/01/07 18:43 -0700:
> I had done this already, but somehow forgot to include it. (Internet
> suggests 'btrfs check' is synonym for 'btrfsck'; if this is not the
> case, please advise.)
>
> [root@archiso ~]# btrfs check /dev/mapper/rootvol_1
> bad key ordering 49 50
> Checking filesystem on /dev/mapper/rootvol_1
> UUID: 91f7e058-1142-4036-b1f7-4f64163dc8ae
> checking extents
> bad key ordering 55 56
> bad block 6210223521792
> Errors found in extent allocation tree or chunk allocation
> bad key ordering 55 56
Does the sudden end means a segfault?
>
> And the other:
>
> [root@archiso ~]# btrfs-debug-tree /dev/mapper/rootvol_1 -b 6210228551680
> bad key ordering 49 50
> leaf 6210228551680 items 195 free space 244 generation 257371 owner 2
That's extent tree, not a big problem as the whole extent tree can be
easily rebuilt.
And what's the output of btrfs-debug-tree /dev/mapper/rootvol_1 -b
6210223521792?
If btrfs-debug-tree can still output things like below, and the leaf's
owner is still 2, I'd recommend to run btrfsck --init-extent-tree, which
should has a good chance to fix it.
Although even in that case, I'm not 100% sure if it will work, or do
more damage...
Thanks,
Qu
> fs uuid 91f7e058-1142-4036-b1f7-4f64163dc8ae
> chunk uuid 6abf465c-c677-4879-a4ca-d632e43e01e4
> item 0 key (7777093095424 EXTENT_ITEM 4096) itemoff 16217 itemsize 66
> extent refs 2 gen 96498 flags DATA
> extent data backref root 258 objectid 1319842 offset
> 16289792 count 1
> shared data backref parent 7588669325312 count 1
> item 1 key (7777093099520 EXTENT_ITEM 4096) itemoff 16151 itemsize 66
> extent refs 2 gen 96498 flags DATA
> extent data backref root 258 objectid 1319842 offset
> 20484096 count 1
> shared data backref parent 7588669325312 count 1
> item 2 key (7777093103616 EXTENT_ITEM 4096) itemoff 16085 itemsize 66
> extent refs 2 gen 96498 flags DATA
> extent data backref root 258 objectid 1319842 offset
> 22581248 count 1
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> item 3 key (7777093107712 EXTENT_ITEM 4096) itemoff 16019 itemsize 66
> extent refs 2 gen 96501 flags DATA
> extent data backref root 258 objectid 1319842 offset
> 56135680 count 1
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> extent refs 2 gen 96501 flags DATA
> extent data backref root 258 objectid 1319842 offset
> 58232832 count 1
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> extent refs 2 gen 96511 flags DATA
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> 35164160 count 1
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> extent refs 2 gen 96511 flags DATA
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> extent refs 2 gen 96521 flags DATA
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> 45649920 count 1
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>
> On Wed, Jan 6, 2016 at 11:02 PM, Qu Wenruo <quwenruo@cn.fujitsu.com> wrote:
>> Did you tried btrfsck without --repair?
>>
>> And would you please paste the output of the following command?
>>
>> # btrfs-debug-tree <YOUR_DEVICE> -b 6210228551680
>>
>> Thanks,
>> Qu
>>
>>
>> Tom Hunt wrote on 2016/01/06 22:16 -0700:
>>>
>>> Some things I missed:
>>>
>>> [root@archiso ~]# uname -a
>>> Linux archiso 4.2.5-1-ARCH #1 SMP PREEMPT Tue Oct 27 08:13:28 CET 2015
>>> x86_64 GNU/Linux
>>> [root@archiso ~]# btrfs --version
>>> btrfs-progs v4.3.1
>>> [root@archiso ~]# btrfs fi show
>>> Label: none uuid: 91f7e058-1142-4036-b1f7-4f64163dc8ae
>>> Total devices 2 FS bytes used 3.84TiB
>>> devid 1 size 5.45TiB used 3.86TiB path /dev/mapper/rootvol_1
>>> devid 2 size 5.45TiB used 3.86TiB path /dev/mapper/rootvol_2
>>>
>>>
>>> This is a liveUSB, but the machine that was running was also an up-to-date
>>> Arch.
>>>
>>> On Wed, Jan 6, 2016 at 9:02 PM, Tom Hunt <tomdicksonhunt@gmail.com> wrote:
>>>>
>>>> I've got a two-disk RAID1 btrfs volume, which crashed for no apparent
>>>> reason and was corrupt on next boot. Relevant command runs and
>>>> outputs:
>>>>
>>>> [root@archiso ~]# mount -osubvol=.,ro,recovery /dev/mapper/rootvol_1 mnt
>>>> mount: wrong fs type, bad option, bad superblock on
>>>> /dev/mapper/rootvol_1,
>>>> missing codepage or helper program, or other error
>>>>
>>>> In some cases useful info is found in syslog - try
>>>> dmesg | tail or so.
>>>> [ 372.665800] Btrfs loaded
>>>> [ 372.666481] BTRFS: device fsid 91f7e058-1142-4036-b1f7-4f64163dc8ae
>>>> devid 1 transid 257371 /dev/dm-4
>>>> [ 389.339860] BTRFS: device fsid 91f7e058-1142-4036-b1f7-4f64163dc8ae
>>>> devid 2 transid 257371 /dev/dm-5
>>>> [ 781.695931] BTRFS info (device dm-5): enabling auto recovery
>>>> [ 781.695933] BTRFS info (device dm-5): disk space caching is enabled
>>>> [ 781.695934] BTRFS: has skinny extents
>>>> [ 781.776198] BTRFS: bdev /dev/mapper/rootvol_2 errs: wr 0, rd 0,
>>>> flush 0, corrupt 10, gen 426
>>>> [ 791.982552] BTRFS critical (device dm-5): corrupt leaf, bad key
>>>> order: block=6210228551680,root=1, slot=49
>>>> [ 791.982836] BTRFS critical (device dm-5): corrupt leaf, bad key
>>>> order: block=6210228551680,root=1, slot=49
>>>> [ 791.982862] BTRFS: Failed to read block groups: -5
>>>> [ 792.030513] BTRFS: open_ctree failed
>>>>
>>>> [root@archiso ~]# btrfs restore -D /dev/mapper/rootvol_1
>>>> /root/tmp_data | tee data_mnt/tom/restore_list.txt
>>>> bad key ordering 49 50
>>>> Error searching -1
>>>> Error searching /root/tmp_data/home
>>>> This is a dry-run, no files are going to be restored
>>>> We have looped trying to restore files in
>>>> /exherbo/root/squashfs-root/usr/bin too many times to be making
>>>> progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/root/squashfs-root/usr/share/man/man1 too many times to be
>>>> making progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/root/squashfs-root/usr/share/man/man3 too many times to be
>>>> making progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/usr/x86_64-pc-linux-gnu/bin too many times to be making
>>>> progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/usr/x86_64-pc-linux-gnu/include/firefox/mozilla/dom too many
>>>> times to be making progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/usr/x86_64-pc-linux-gnu/include/firefox too many times to be
>>>> making progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/usr/x86_64-pc-linux-gnu/lib/python3.5/test/__pycache__ too
>>>> many times to be making progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/usr/x86_64-pc-linux-gnu/lib/python2.7/test too many times to
>>>> be making progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/usr/x86_64-pc-linux-gnu/lib/debug/usr/x86_64-pc-linux-gnu/bin
>>>> too many times to be making progress, stopping
>>>> We have looped trying to restore files in /exherbo/usr/share/man/man3
>>>> too many times to be making progress, stopping
>>>> We have looped trying to restore files in /exherbo/usr/share/man/man1
>>>> too many times to be making progress, stopping
>>>> We have looped trying to restore files in
>>>> /exherbo/usr/share/idl/firefox too many times to be making progress,
>>>> stopping
>>>>
>>>> [root@archiso ~]# btrfs restore -v -l /dev/mapper/rootvol_1
>>>> bad key ordering 49 50
>>>> tree key (EXTENT_TREE ROOT_ITEM 0) 6210219163648 level 2
>>>> tree key (DEV_TREE ROOT_ITEM 0) 3792640000000 level 1
>>>> tree key (FS_TREE ROOT_ITEM 0) 3792595566592 level 0
>>>> tree key (CSUM_TREE ROOT_ITEM 0) 6210220048384 level 3
>>>> tree key (UUID_TREE ROOT_ITEM 0) 3792855105536 level 0
>>>> tree key (257 ROOT_ITEM 0) 3792551755776 level 2
>>>> tree key (258 ROOT_ITEM 0) 6210218557440 level 2
>>>> tree key (3785 ROOT_ITEM 0) 7588191682560 level 0
>>>> tree key (3786 ROOT_ITEM 0) 7588191633408 level 0
>>>> tree key (7565 ROOT_ITEM 0) 6210221588480 level 2
>>>> tree key (7566 ROOT_ITEM 0) 4055721377792 level 0
>>>> tree key (7567 ROOT_ITEM 101377) 3792849616896 level 2
>>>> tree key (DATA_RELOC_TREE ROOT_ITEM 0) 3792520544256 level 0
>>>>
>>>> Any help available? I tried using btrfs-restore previously on a
>>>> different machine with only one of the disks plugged in, and it at
>>>> least showed some files, though the 'Error searching -1' still showed
>>>> up. (The /home subvolume is the only one I really care about;
>>>> everything else is nice-to-have.)
>>>>
>>>> --
>>>> Tom Hunt
>>>
>>>
>>>
>>>
>>
>>
>
>
>
next prev parent reply other threads:[~2016-01-08 1:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-07 4:02 Recovery of a raid1 FS Tom Hunt
2016-01-07 5:16 ` Tom Hunt
2016-01-07 6:02 ` Qu Wenruo
2016-01-08 1:43 ` Tom Hunt
2016-01-08 1:48 ` Qu Wenruo [this message]
2016-01-08 2:02 ` Tom Hunt
2016-01-08 2:26 ` Qu Wenruo
2016-01-08 3:46 ` Tom Hunt
2016-01-09 7:18 ` Tom Hunt
2016-01-11 1:50 ` Qu Wenruo
2016-01-22 17:10 ` Tom Hunt
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