* Help needed with filesystem errors: parent transid verify failed
@ 2021-03-28 15:40 B A
2021-03-29 1:02 ` Chris Murphy
2021-03-30 0:07 ` Chris Murphy
0 siblings, 2 replies; 13+ messages in thread
From: B A @ 2021-03-28 15:40 UTC (permalink / raw)
To: linux-btrfs
[-- Attachment #1: Type: text/plain, Size: 3416 bytes --]
Dear btrfs experts,
On my desktop PC, I have 1 btrfs partition on a single SSD device with 3 subvolumes (/, /home, /var). Whenever I boot my PC, after logging in to GNOME, the btrfs partition is being remounted as ro due to errors. This is the dmesg output at that time:
> [ 616.155392] BTRFS error (device dm-0): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> [ 616.155650] BTRFS error (device dm-0): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> [ 616.155657] BTRFS: error (device dm-0) in __btrfs_free_extent:3054: errno=-5 IO failure
> [ 616.155662] BTRFS info (device dm-0): forced readonly
> [ 616.155665] BTRFS: error (device dm-0) in btrfs_run_delayed_refs:2124: errno=-5 IO failure
The issue started to happen today after login. Yesterday everything works fine. I suggest something went wrong on last shutdown but I don't know for sure because as this disk also has my logs, I don't see any errors on that shutdown in my logs.
System info:
* Fedora 33 x86_64
* kernel: Linux 5.11.10-200.fc33.x86_64 #1 SMP
* btrfs-progs v5.10 (5.10-1.fc33.x86_64)
* Samsung 840 series SSD (SMART data looks fine)
What happens:
1. I boot my PC including mounting the root partition
2. Everything works fine.
3. I can log in as root or my user on tty and do basic stuff there and it works
4. I log in to my user account (gdm, GNOME shell). Alternatively, running e.g. `dnf history info last` also triggers the dmesg output shown above.
5. Many applications don't work any more. The common root cause seems to be that the filesystem is remounted readonly due to the errors noted above.
Basic info: see attached file "dmesg info.txt" (generated from Fedora live system)
What I've tried so far:
1. I ran `btrfs scrub` from live system. This errors out:
> [root@localhost-live liveuser]# btrfs scrub start -B /mnt
> ERROR: scrubbing /mnt failed for device id 1: ret=-1, errno=5 (Input/output error)
> scrub canceled for 1a149bda-057d-4775-ba66-1bf259fce9a5
> Scrub started: Sun Mar 28 07:20:07 2021
> Status: aborted
> Duration: 0:13:00
> Total to scrub: 269.06GiB
> Rate: 252.24MiB/s
> Error summary: no errors found
At the same time, in `dmesg`, I see this:
> [ 7878.612534] BTRFS error (device dm-2): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> [ 7878.637673] BTRFS error (device dm-2): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> [ 7878.639459] BTRFS info (device dm-2): scrub: not finished on devid 1 with status: -5
2. I ran `btrfs check` (without repair) from live system. This also shows errors (see attached file "btrfs check.txt".
Side note: There is also a rare chance that this issue is triggered by a software update I did yesterday. This includes an update of systemd-246.10 to systemd-246.13 and kernel-5.11.8 to kernel-5.11.10.
Changes in systemd: https://src.fedoraproject.org/rpms/systemd/commits/f33
Changes in kernel: https://src.fedoraproject.org/rpms/kernel/commits/f33
Since this update has also been deployed to many other users (I am using stable channel) and I have not seen any related issues in Fedora's bugzilla and discourse, so I doubt this is related.
What shall I do now? Do I need any of the invasive methods (`btrfs rescue` or `btrfs check --repair`) and if yes, which method do I choose?
Kind regards,
Chris
[-- Attachment #2: btrfs check.txt --]
[-- Type: text/plain, Size: 2192 bytes --]
[root@localhost-live liveuser]# btrfs check /dev/mapper/luks-ff6e174f-4cd3-42a7-8ee5-47005dd077dc
Opening filesystem to check...
ERROR: /dev/mapper/luks-ff6e174f-4cd3-42a7-8ee5-47005dd077dc is currently mounted, use --force if you really intend to check the filesystem
[root@localhost-live liveuser]# btrfs check /dev/mapper/luks-ff6e174f-4cd3-42a7-8ee5-47005dd077dc
Opening filesystem to check...
Checking filesystem on /dev/mapper/luks-ff6e174f-4cd3-42a7-8ee5-47005dd077dc
UUID: 1a149bda-057d-4775-ba66-1bf259fce9a5
[1/7] checking root items
parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
Ignoring transid failure
ERROR: child eb corrupted: parent bytenr=1144881201152 item=14 parent level=1 child level=2
ERROR: failed to repair root items: Input/output error
[2/7] checking extents
parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
Ignoring transid failure
bad block 1144783093760
ERROR: errors found in extent allocation tree or chunk allocation
[3/7] checking free space cache
parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
Ignoring transid failure
ERROR: child eb corrupted: parent bytenr=1144881201152 item=14 parent level=1 child level=2
cache appears valid but isn't 1062040764416
[4/7] checking fs roots
[5/7] checking only csums items (without verifying data)
parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
Ignoring transid failure
ERROR: child eb corrupted: parent bytenr=1144881201152 item=14 parent level=1 child level=2
Error going to next leaf -5
csum exists for 1062926516224-1062935089152 but there is no extent record
ERROR: errors found in csum tree
[6/7] checking root refs
[7/7] checking quota groups skipped (not enabled on this FS)
ERROR: transid errors in file system
found 11738640384 bytes used, error(s) found
total csum bytes: 0
total tree bytes: 3719168
total fs tree bytes: 0
total extent tree bytes: 3522560
btree space waste bytes: 1056895
file data blocks allocated: 69992448
referenced 69992448
[-- Attachment #3: btrfs info.txt --]
[-- Type: text/plain, Size: 569 bytes --]
[root@localhost-live liveuser]# btrfs --version
btrfs-progs v5.7
[root@localhost-live liveuser]# btrfs fi show
Label: 'fedora_chstpc-2' uuid: 1a149bda-057d-4775-ba66-1bf259fce9a5
Total devices 1 FS bytes used 230.46GiB
devid 1 size 300.00GiB used 269.06GiB path /dev/mapper/luks-ff6e174f-4cd3-42a7-8ee5-47005dd077dc
[root@localhost-live liveuser]# btrfs fi df /mnt
Data, single: total=263.00GiB, used=228.47GiB
System, DUP: total=32.00MiB, used=48.00KiB
Metadata, DUP: total=3.00GiB, used=1.99GiB
GlobalReserve, single: total=397.25MiB, used=0.00B
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: Help needed with filesystem errors: parent transid verify failed
2021-03-28 15:40 Help needed with filesystem errors: parent transid verify failed B A
@ 2021-03-29 1:02 ` Chris Murphy
2021-03-29 1:12 ` Chris Murphy
` (2 more replies)
2021-03-30 0:07 ` Chris Murphy
1 sibling, 3 replies; 13+ messages in thread
From: Chris Murphy @ 2021-03-29 1:02 UTC (permalink / raw)
To: B A; +Cc: Btrfs BTRFS
On Sun, Mar 28, 2021 at 9:41 AM B A <chris.std@web.de> wrote:
>
> Dear btrfs experts,
>
>
> On my desktop PC, I have 1 btrfs partition on a single SSD device with 3 subvolumes (/, /home, /var). Whenever I boot my PC, after logging in to GNOME, the btrfs partition is being remounted as ro due to errors. This is the dmesg output at that time:
>
> > [ 616.155392] BTRFS error (device dm-0): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> > [ 616.155650] BTRFS error (device dm-0): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> > [ 616.155657] BTRFS: error (device dm-0) in __btrfs_free_extent:3054: errno=-5 IO failure
> > [ 616.155662] BTRFS info (device dm-0): forced readonly
> > [ 616.155665] BTRFS: error (device dm-0) in btrfs_run_delayed_refs:2124: errno=-5 IO failure
transid error usually means something below Btrfs got the write
ordering wrong and one or more writes dropped, but the problem isn't
detected until later which means it's an older problem. What's the
oldest kernel this file system has been written with? That is, is it a
new Fedora 33 file system? Or older? Fedora 33 came with 5.8.15.
ERROR: child eb corrupted: parent bytenr=1144783093760 item=14 parent
level=1 child level=2
ERROR: child eb corrupted: parent bytenr=1144881201152 item=14 parent
level=1 child level=2
Can you post the output from both:
btrfs insp dump-t -b 1144783093760 /dev/dm-0
btrfs insp dump-t -b 1144881201152 /dev/dm-0
> What shall I do now? Do I need any of the invasive methods (`btrfs rescue` or `btrfs check --repair`) and if yes, which method do I choose?
No repairs yet until we know what's wrong and if it's safe to try to repair it.
In the meantime I highly recommend refreshing backups of /home in case
this can't be repaired. It might be easier to do this with a Live USB
boot of Fedora 33, and use 'mount -o ro,subvol=home /dev/dm-0
/mnt/home' to mount your home read-only to get a backup. Live
environment will be more cooperative.
--
Chris Murphy
^ permalink raw reply [flat|nested] 13+ messages in thread* Re: Help needed with filesystem errors: parent transid verify failed
2021-03-29 1:02 ` Chris Murphy
@ 2021-03-29 1:12 ` Chris Murphy
2021-03-29 7:34 ` Aw: " B A
2021-03-29 7:36 ` Aw: " B A
2 siblings, 0 replies; 13+ messages in thread
From: Chris Murphy @ 2021-03-29 1:12 UTC (permalink / raw)
To: Chris Murphy; +Cc: B A, Btrfs BTRFS
On Sun, Mar 28, 2021 at 7:02 PM Chris Murphy <lists@colorremedies.com> wrote:
>
> Can you post the output from both:
>
> btrfs insp dump-t -b 1144783093760 /dev/dm-0
> btrfs insp dump-t -b 1144881201152 /dev/dm-0
I'm not sure if those dumps will contain filenames, so check them.
It's ok to remove filenames before posting the output. You can also
use the option --hide-names.
btrfs insp dump-t --hide-names -b 1144783093760 /dev/dm-0
It may be a good idea to do a memory test as well.
--
Chris Murphy
^ permalink raw reply [flat|nested] 13+ messages in thread
* Aw: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-29 1:02 ` Chris Murphy
2021-03-29 1:12 ` Chris Murphy
@ 2021-03-29 7:34 ` B A
2021-03-29 8:09 ` Chris Murphy
2021-03-29 7:36 ` Aw: " B A
2 siblings, 1 reply; 13+ messages in thread
From: B A @ 2021-03-29 7:34 UTC (permalink / raw)
To: Chris Murphy; +Cc: Btrfs BTRFS
[-- Attachment #1: Type: text/plain, Size: 3070 bytes --]
> Gesendet: Montag, 29. März 2021 um 01:02 Uhr
> Von: "Chris Murphy" <lists@colorremedies.com>
> An: "B A" <chris.std@web.de>
> Cc: "Btrfs BTRFS" <linux-btrfs@vger.kernel.org>
> Betreff: Re: Help needed with filesystem errors: parent transid verify failed
>
> On Sun, Mar 28, 2021 at 9:41 AM B A <chris.std@web.de> wrote:
> >
> > Dear btrfs experts,
> >
> >
> > On my desktop PC, I have 1 btrfs partition on a single SSD device with 3 subvolumes (/, /home, /var). Whenever I boot my PC, after logging in to GNOME, the btrfs partition is being remounted as ro due to errors. This is the dmesg output at that time:
> >
> > > [ 616.155392] BTRFS error (device dm-0): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> > > [ 616.155650] BTRFS error (device dm-0): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> > > [ 616.155657] BTRFS: error (device dm-0) in __btrfs_free_extent:3054: errno=-5 IO failure
> > > [ 616.155662] BTRFS info (device dm-0): forced readonly
> > > [ 616.155665] BTRFS: error (device dm-0) in btrfs_run_delayed_refs:2124: errno=-5 IO failure
>
> transid error usually means something below Btrfs got the write
> ordering wrong and one or more writes dropped, but the problem isn't
> detected until later which means it's an older problem. What's the
> oldest kernel this file system has been written with? That is, is it a
> new Fedora 33 file system? Or older? Fedora 33 came with 5.8.15.
This is a very old BTRFS filesystem created with Fedora *23* i.e. a linux kernel and btrfs-progs around version 4.2. It was probably created 2015-10-31 with Fedora 23 beta and kernel 4.2.4 or 4.2.5.
I ran `btrfs scrub` about a month ago without issues. I ran `btrfs check` maybe a year ago without issues. I also run `btrfs filesystem balance` from time to time (~once a year). None of these have shown the issue before. Does that mean that the issue has not been present for a long time (>1 year)?
> ERROR: child eb corrupted: parent bytenr=1144783093760 item=14 parent
> level=1 child level=2
> ERROR: child eb corrupted: parent bytenr=1144881201152 item=14 parent
> level=1 child level=2
>
> Can you post the output from both:
>
> btrfs insp dump-t -b 1144783093760 /dev/dm-0
See attached file "btrfs_insp_dump-t_-b_x60.txt"
> btrfs insp dump-t -b 1144881201152 /dev/dm-0
See attached file "btrfs_insp_dump-t_-b_x52.txt"
> > What shall I do now? Do I need any of the invasive methods (`btrfs rescue` or `btrfs check --repair`) and if yes, which method do I choose?
>
> No repairs yet until we know what's wrong and if it's safe to try to repair it.
>
> In the meantime I highly recommend refreshing backups of /home in case
> this can't be repaired. It might be easier to do this with a Live USB
> boot of Fedora 33, and use 'mount -o ro,subvol=home /dev/dm-0
> /mnt/home' to mount your home read-only to get a backup. Live
> environment will be more cooperative.
> --
> Chris Murphy
Thanks for your help so far!
Kind regards,
Chris
[-- Attachment #2: btrfs_insp_dump-t_-b_x52.txt --]
[-- Type: text/plain, Size: 23567 bytes --]
btrfs-progs v5.10
node 1144881201152 level 1 items 326 free space 167 generation 2734383 owner EXTENT_TREE
node 1144881201152 flags 0x1(WRITTEN) backref revision 1
fs uuid 1a149bda-057d-4775-ba66-1bf259fce9a5
chunk uuid 66e88af8-618f-4dc9-8b88-908eb1904318
key (1062040764416 EXTENT_ITEM 134217728) block 1144757714944 gen 2734382
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[-- Attachment #3: btrfs_insp_dump-t_-b_x60.txt --]
[-- Type: text/plain, Size: 5719 bytes --]
btrfs-progs v5.10
node 1144783093760 level 2 items 70 free space 423 generation 2734305 owner CSUM_TREE
node 1144783093760 flags 0x1(WRITTEN) backref revision 1
fs uuid 1a149bda-057d-4775-ba66-1bf259fce9a5
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^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-29 7:34 ` Aw: " B A
@ 2021-03-29 8:09 ` Chris Murphy
2021-03-29 8:42 ` Aw: " B A
0 siblings, 1 reply; 13+ messages in thread
From: Chris Murphy @ 2021-03-29 8:09 UTC (permalink / raw)
To: B A, Btrfs BTRFS; +Cc: Qu Wenruo, Josef Bacik
On Mon, Mar 29, 2021 at 1:34 AM B A <chris.std@web.de> wrote:
>
> This is a very old BTRFS filesystem created with Fedora *23* i.e. a linux kernel and btrfs-progs around version 4.2. It was probably created 2015-10-31 with Fedora 23 beta and kernel 4.2.4 or 4.2.5.
>
> I ran `btrfs scrub` about a month ago without issues. I ran `btrfs check` maybe a year ago without issues. I also run `btrfs filesystem balance` from time to time (~once a year). None of these have shown the issue before. Does that mean that the issue has not been present for a long time (>1 year)?
Maybe. The generation on these two leaves look recent. But kernels
since ~5.3 have a write time tree checker designed to catch metadata
errors before they are written.
What do you get for:
btrfs insp dump-s -f /dev/dm-0
Hopefully Qu or Josef will have an idea.
--
Chris Murphy
^ permalink raw reply [flat|nested] 13+ messages in thread
* Aw: Re: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-29 8:09 ` Chris Murphy
@ 2021-03-29 8:42 ` B A
2021-03-29 13:36 ` Josef Bacik
0 siblings, 1 reply; 13+ messages in thread
From: B A @ 2021-03-29 8:42 UTC (permalink / raw)
To: Chris Murphy, btrfs kernel mailing list; +Cc: Qu Wenruo, Josef Bacik
[-- Attachment #1: Type: text/plain, Size: 576 bytes --]
> Gesendet: Montag, 29. März 2021 um 08:09 Uhr
> Von: "Chris Murphy" <lists@colorremedies.com>
> An: "B A" <chris.std@web.de>, "Btrfs BTRFS" <linux-btrfs@vger.kernel.org>
> Cc: "Qu Wenruo" <quwenruo.btrfs@gmx.com>, "Josef Bacik" <josef@toxicpanda.com>
> Betreff: Re: Re: Help needed with filesystem errors: parent transid verify failed
> […]
>
> What do you get for:
>
> btrfs insp dump-s -f /dev/dm-0
See attached file "btrfs_insp_dump-s_-f.txt"
> Hopefully Qu or Josef will have an idea.
>
> --
> Chris Murphy
Thanks again!
Kind regards,
Chris
[-- Attachment #2: btrfs_insp_dump-s_-f.txt --]
[-- Type: text/plain, Size: 3481 bytes --]
superblock: bytenr=65536, device=/dev/mapper/luks-ff6e174f-4cd3-42a7-8ee5-47005dd077dc
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0x0fcf13cc [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 1a149bda-057d-4775-ba66-1bf259fce9a5
metadata_uuid 1a149bda-057d-4775-ba66-1bf259fce9a5
label fedora_chstpc-2
generation 2734487
root 1144777555968
sys_array_size 129
chunk_root_generation 2708287
root_level 1
chunk_root 1144718917632
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 322120450048
bytes_used 247510102016
sectorsize 4096
nodesize 16384
leafsize (deprecated) 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x169
( MIXED_BACKREF |
COMPRESS_LZO |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
cache_generation 2734487
uuid_tree_generation 2734487
dev_item.uuid f7c9ee7f-0de1-49bb-a838-fdc9b4111331
dev_item.fsid 1a149bda-057d-4775-ba66-1bf259fce9a5 [match]
dev_item.type 0
dev_item.total_bytes 322120450048
dev_item.bytes_used 288903659520
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 1
dev_item.dev_group 0
dev_item.seek_speed 0
dev_item.bandwidth 0
dev_item.generation 0
sys_chunk_array[2048]:
item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1144718884864)
length 33554432 owner 2 stripe_len 65536 type SYSTEM|DUP
io_align 65536 io_width 65536 sector_size 4096
num_stripes 2 sub_stripes 1
stripe 0 devid 1 offset 1074790400
dev_uuid f7c9ee7f-0de1-49bb-a838-fdc9b4111331
stripe 1 devid 1 offset 1108344832
dev_uuid f7c9ee7f-0de1-49bb-a838-fdc9b4111331
backup_roots[4]:
backup 0:
backup_tree_root: 1144895651840 gen: 2734484 level: 1
backup_chunk_root: 1144718917632 gen: 2708287 level: 1
backup_extent_root: 1144891129856 gen: 2734484 level: 2
backup_fs_root: 1145036898304 gen: 2734355 level: 0
backup_dev_root: 1144828215296 gen: 2734438 level: 1
backup_csum_root: 1144889982976 gen: 2734484 level: 2
backup_total_bytes: 322120450048
backup_bytes_used: 247427117056
backup_num_devices: 1
backup 1:
backup_tree_root: 1144902451200 gen: 2734485 level: 1
backup_chunk_root: 1144718917632 gen: 2708287 level: 1
backup_extent_root: 1144897241088 gen: 2734485 level: 2
backup_fs_root: 1145036898304 gen: 2734355 level: 0
backup_dev_root: 1144828215296 gen: 2734438 level: 1
backup_csum_root: 1144891408384 gen: 2734485 level: 2
backup_total_bytes: 322120450048
backup_bytes_used: 247439462400
backup_num_devices: 1
backup 2:
backup_tree_root: 1144915836928 gen: 2734486 level: 1
backup_chunk_root: 1144718917632 gen: 2708287 level: 1
backup_extent_root: 1144753078272 gen: 2734486 level: 2
backup_fs_root: 0 gen: 0 level: 0
backup_dev_root: 1144771723264 gen: 2734486 level: 1
backup_csum_root: 1144755093504 gen: 2734486 level: 2
backup_total_bytes: 322120450048
backup_bytes_used: 247510102016
backup_num_devices: 1
backup 3:
backup_tree_root: 1144777555968 gen: 2734487 level: 1
backup_chunk_root: 1144718917632 gen: 2708287 level: 1
backup_extent_root: 1144777916416 gen: 2734487 level: 2
backup_fs_root: 0 gen: 0 level: 0
backup_dev_root: 1144771723264 gen: 2734486 level: 1
backup_csum_root: 1144809537536 gen: 2734487 level: 2
backup_total_bytes: 322120450048
backup_bytes_used: 247510102016
backup_num_devices: 1
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: Aw: Re: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-29 8:42 ` Aw: " B A
@ 2021-03-29 13:36 ` Josef Bacik
2021-04-01 12:36 ` Aw: " B A
0 siblings, 1 reply; 13+ messages in thread
From: Josef Bacik @ 2021-03-29 13:36 UTC (permalink / raw)
To: B A, Chris Murphy, btrfs kernel mailing list; +Cc: Qu Wenruo
On 3/29/21 4:42 AM, B A wrote:
>> Gesendet: Montag, 29. März 2021 um 08:09 Uhr
>> Von: "Chris Murphy" <lists@colorremedies.com>
>> An: "B A" <chris.std@web.de>, "Btrfs BTRFS" <linux-btrfs@vger.kernel.org>
>> Cc: "Qu Wenruo" <quwenruo.btrfs@gmx.com>, "Josef Bacik" <josef@toxicpanda.com>
>> Betreff: Re: Re: Help needed with filesystem errors: parent transid verify failed
>> […]
>>
>> What do you get for:
>>
>> btrfs insp dump-s -f /dev/dm-0
>
> See attached file "btrfs_insp_dump-s_-f.txt"
>
I'm on PTO this week so I'll be a little less responsive, but thankfully this is
just the extent tree. First thing is to make sure you've backed everything up,
and then you should be able to just do btrfs check --repair and it should fix it
for you.
However I've noticed some failure cases where it won't fix transid errors
sometimes because it errors out trying to read the things. If that happens just
let me know, I have a private branch with fsck changes to address this class of
problems and I can point you at that. I'd rather wait to make sure the normal
fsck won't work first tho, just in case. Thanks,
Josef
^ permalink raw reply [flat|nested] 13+ messages in thread
* Aw: Re: Re: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-29 13:36 ` Josef Bacik
@ 2021-04-01 12:36 ` B A
0 siblings, 0 replies; 13+ messages in thread
From: B A @ 2021-04-01 12:36 UTC (permalink / raw)
To: Josef Bacik, btrfs kernel mailing list; +Cc: Chris Murphy, Qu Wenruo
> Gesendet: Montag, 29. März 2021 um 13:36 Uhr
> Von: "Josef Bacik" <josef@toxicpanda.com>
> An: "B A" <chris.std@web.de>, "Chris Murphy" <lists@colorremedies.com>, "btrfs kernel mailing list" <linux-btrfs@vger.kernel.org>
> Cc: "Qu Wenruo" <quwenruo.btrfs@gmx.com>
> Betreff: Re: Aw: Re: Re: Help needed with filesystem errors: parent transid verify failed
>
> I'm on PTO this week so I'll be a little less responsive, but thankfully this is
> just the extent tree. First thing is to make sure you've backed everything up,
> and then you should be able to just do btrfs check --repair and it should fix it
> for you.
Sadly, it does not:
# btrfs check --repair --progress
enabling repair mode
[usage warning]
Starting repair.
Opening filesystem to check...
Checking filesystem on /dev/mapper/luks-ff6e174f-4cd3-42a7-8ee5-47005dd077dc
UUID: 1a149bda-057d-4775-ba66-1bf259fce9a5
repair mode will force to clear out log tree, are you sure? [y/N]: [1/7] checking root items (0:0parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
Ignoring transid failure
ERROR: child eb corrupted: parent bytenr=1145025249280 item=14 parent level=1 child level=2
ERROR: [1/7] checking root items (0:00:00 elapsed, 2657 items checked)
failed to repair root items: Input/output error
> However I've noticed some failure cases where it won't fix transid errors
> sometimes because it errors out trying to read the things. If that happens just
> let me know, I have a private branch with fsck changes to address this class of
> problems and I can point you at that. I'd rather wait to make sure the normal
> fsck won't work first tho, just in case.
Since I do have plenty of backups and it seems like the filesystem is still readable, I think I'd rather delete the filesystem and create a fresh one. I don't want to take more of your time here, unless you do want to know more details for testing your changes. Thanks for all the hints so far!
Many thanks altogether!
Kind regards,
Chris
^ permalink raw reply [flat|nested] 13+ messages in thread
* Aw: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-29 1:02 ` Chris Murphy
2021-03-29 1:12 ` Chris Murphy
2021-03-29 7:34 ` Aw: " B A
@ 2021-03-29 7:36 ` B A
2 siblings, 0 replies; 13+ messages in thread
From: B A @ 2021-03-29 7:36 UTC (permalink / raw)
To: Btrfs BTRFS
[-- Attachment #1: Type: text/plain, Size: 3074 bytes --]
> Gesendet: Montag, 29. März 2021 um 01:02 Uhr
> Von: "Chris Murphy" <lists@colorremedies.com>
> An: "B A" <chris.std@web.de>
> Cc: "Btrfs BTRFS" <linux-btrfs@vger.kernel.org>
> Betreff: Re: Help needed with filesystem errors: parent transid verify failed
>
> On Sun, Mar 28, 2021 at 9:41 AM B A <chris.std@web.de> wrote:
> >
> > Dear btrfs experts,
> >
> >
> > On my desktop PC, I have 1 btrfs partition on a single SSD device with 3 subvolumes (/, /home, /var). Whenever I boot my PC, after logging in to GNOME, the btrfs partition is being remounted as ro due to errors. This is the dmesg output at that time:
> >
> > > [ 616.155392] BTRFS error (device dm-0): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> > > [ 616.155650] BTRFS error (device dm-0): parent transid verify failed on 1144783093760 wanted 2734307 found 2734305
> > > [ 616.155657] BTRFS: error (device dm-0) in __btrfs_free_extent:3054: errno=-5 IO failure
> > > [ 616.155662] BTRFS info (device dm-0): forced readonly
> > > [ 616.155665] BTRFS: error (device dm-0) in btrfs_run_delayed_refs:2124: errno=-5 IO failure
>
> transid error usually means something below Btrfs got the write
> ordering wrong and one or more writes dropped, but the problem isn't
> detected until later which means it's an older problem. What's the
> oldest kernel this file system has been written with? That is, is it a
> new Fedora 33 file system? Or older? Fedora 33 came with 5.8.15.
This is a very old BTRFS filesystem created with Fedora *23* i.e. a linux kernel and btrfs-progs around version 4.2. It was probably created 2015-10-31 with Fedora 23 beta and kernel 4.2.4 or 4.2.5.
I ran `btrfs scrub` about a month ago without issues. I ran `btrfs check` maybe a year ago without issues. I also run `btrfs filesystem balance` from time to time (~once a year). None of these have shown the issue before. Does that mean that the issue has not been present for a long time (>1 year)?
> ERROR: child eb corrupted: parent bytenr=1144783093760 item=14 parent
> level=1 child level=2
> ERROR: child eb corrupted: parent bytenr=1144881201152 item=14 parent
> level=1 child level=2
>
> Can you post the output from both:
>
> btrfs insp dump-t -b 1144783093760 /dev/dm-0
See attached file "btrfs_insp_dump-t_[…]x60.txt"
> btrfs insp dump-t -b 1144881201152 /dev/dm-0
See attached file "btrfs_insp_dump-t_[…]x52.txt"
> > What shall I do now? Do I need any of the invasive methods (`btrfs rescue` or `btrfs check --repair`) and if yes, which method do I choose?
>
> No repairs yet until we know what's wrong and if it's safe to try to repair it.
>
> In the meantime I highly recommend refreshing backups of /home in case
> this can't be repaired. It might be easier to do this with a Live USB
> boot of Fedora 33, and use 'mount -o ro,subvol=home /dev/dm-0
> /mnt/home' to mount your home read-only to get a backup. Live
> environment will be more cooperative.
> --
> Chris Murphy
Thanks for your help so far!
Kind regards,
Chris
[-- Attachment #2: btrfs_insp_dump-t_-b_x52.txt --]
[-- Type: text/plain, Size: 23567 bytes --]
btrfs-progs v5.10
node 1144881201152 level 1 items 326 free space 167 generation 2734383 owner EXTENT_TREE
node 1144881201152 flags 0x1(WRITTEN) backref revision 1
fs uuid 1a149bda-057d-4775-ba66-1bf259fce9a5
chunk uuid 66e88af8-618f-4dc9-8b88-908eb1904318
key (1062040764416 EXTENT_ITEM 134217728) block 1144757714944 gen 2734382
key (1062902063104 EXTENT_ITEM 4096) block 1145031868416 gen 2734333
key (1062903029760 EXTENT_ITEM 4096) block 1144957698048 gen 2734342
key (1062904578048 EXTENT_ITEM 4096) block 1144974278656 gen 2734320
key (1062906568704 EXTENT_ITEM 4096) block 1144952291328 gen 2734326
key (1062908137472 EXTENT_ITEM 4096) block 1144755568640 gen 2734382
key (1062910189568 EXTENT_ITEM 12288) block 1144776933376 gen 2734307
key (1062911852544 EXTENT_ITEM 8192) block 1144937234432 gen 2734341
key (1062914019328 EXTENT_ITEM 8192) block 1144897552384 gen 2734348
key (1062916395008 EXTENT_ITEM 8192) block 1144897568768 gen 2734348
key (1062918307840 EXTENT_ITEM 4096) block 1144951488512 gen 2734350
key (1062920740864 EXTENT_ITEM 4096) block 1144867684352 gen 2734353
key (1062922932224 EXTENT_ITEM 20480) block 1144951521280 gen 2734350
key (1062925910016 EXTENT_ITEM 4096) block 1144990302208 gen 2734354
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key (1062932807680 EXTENT_ITEM 4096) block 1144773771264 gen 2734353
key (1062935441408 EXTENT_ITEM 4096) block 1144785289216 gen 2734307
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key (1062939271168 EXTENT_ITEM 4096) block 1151304548352 gen 2734245
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key (1062996119552 EXTENT_ITEM 49152) block 1144757878784 gen 2734305
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[-- Attachment #3: btrfs_insp_dump-t_-b_x60.txt --]
[-- Type: text/plain, Size: 5719 bytes --]
btrfs-progs v5.10
node 1144783093760 level 2 items 70 free space 423 generation 2734305 owner CSUM_TREE
node 1144783093760 flags 0x1(WRITTEN) backref revision 1
fs uuid 1a149bda-057d-4775-ba66-1bf259fce9a5
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key (EXTENT_CSUM EXTENT_CSUM 1300323385344) block 1144753651712 gen 2734305
key (EXTENT_CSUM EXTENT_CSUM 1303544856576) block 1151303925760 gen 2734245
key (EXTENT_CSUM EXTENT_CSUM 1309167861760) block 1151314804736 gen 2734249
key (EXTENT_CSUM EXTENT_CSUM 1317585489920) block 1145021825024 gen 2729896
key (EXTENT_CSUM EXTENT_CSUM 1323690971136) block 1151204327424 gen 2734218
key (EXTENT_CSUM EXTENT_CSUM 1335426256896) block 1151205916672 gen 2731874
key (EXTENT_CSUM EXTENT_CSUM 1340210253824) block 1146594689024 gen 2731866
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: Help needed with filesystem errors: parent transid verify failed
2021-03-28 15:40 Help needed with filesystem errors: parent transid verify failed B A
2021-03-29 1:02 ` Chris Murphy
@ 2021-03-30 0:07 ` Chris Murphy
2021-03-30 8:44 ` Aw: " B A
1 sibling, 1 reply; 13+ messages in thread
From: Chris Murphy @ 2021-03-30 0:07 UTC (permalink / raw)
To: B A; +Cc: Btrfs BTRFS
On Sun, Mar 28, 2021 at 9:41 AM B A <chris.std@web.de> wrote:
>
> * Samsung 840 series SSD (SMART data looks fine)
EVO or PRO? And what does its /proc/mounts line look like?
Total_LBAs_Written?
--
Chris Murphy
^ permalink raw reply [flat|nested] 13+ messages in thread
* Aw: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-30 0:07 ` Chris Murphy
@ 2021-03-30 8:44 ` B A
2021-03-30 20:17 ` Chris Murphy
0 siblings, 1 reply; 13+ messages in thread
From: B A @ 2021-03-30 8:44 UTC (permalink / raw)
To: Chris Murphy, btrfs kernel mailing list
[-- Attachment #1: Type: text/plain, Size: 1174 bytes --]
> Gesendet: Dienstag, 30. März 2021 um 00:07 Uhr
> Von: "Chris Murphy" <lists@colorremedies.com>
> An: "B A" <chris.std@web.de>
> Cc: "Btrfs BTRFS" <linux-btrfs@vger.kernel.org>
> Betreff: Re: Help needed with filesystem errors: parent transid verify failed
>
> On Sun, Mar 28, 2021 at 9:41 AM B A <chris.std@web.de> wrote:
> >
> > * Samsung 840 series SSD (SMART data looks fine)
>
> EVO or PRO? And what does its /proc/mounts line look like?
Model is MZ-7TD500, which seems to be an EVO. Firmware is DXT08B0Q.
From /etc/fstab:
UUID=1a149bda-057d-4775-ba66-1bf259fce9a5 / btrfs subvol=root-f23,x-systemd.device-timeout=0,compress=lzo,ssd,noatime 0 0
UUID=1b1f5c60-57f3-435c-b73e-2de727a302e2 /boot ext4 nosuid,noexec,nodev 1 2
UUID=1a149bda-057d-4775-ba66-1bf259fce9a5 /home btrfs subvol=home,x-systemd.device-timeout=0,compress=lzo,ssd,nosuid,nodev,noatime 0 0
UUID=1a149bda-057d-4775-ba66-1bf259fce9a5 /var btrfs subvol=var-f23,x-systemd.device-timeout=0,compress=lzo,ssd,nosuid,noexec,nodev,noatime 0 0
> Total_LBAs_Written?
Raw value: 92857573119
(full output in attached file)
Kind regards,
Chris
[-- Attachment #2: smartctl_-all.txt --]
[-- Type: text/plain, Size: 4555 bytes --]
smartctl 7.2 2021-01-17 r5171 [x86_64-linux-5.8.15-301.fc33.x86_64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Samsung based SSDs
Device Model: Samsung SSD 840 Series
Serial Number: [removed]
LU WWN Device Id: [removed]
Firmware Version: DXT08B0Q
User Capacity: 500,107,862,016 bytes [500 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
TRIM Command: Available, deterministic, zeroed
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2, ATA8-ACS T13/1699-D revision 4c
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Tue Mar 30 04:37:16 2021 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
Auto Offline Data Collection: Disabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: (53956) seconds.
Offline data collection
capabilities: (0x53) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
No Offline surface scan supported.
Self-test supported.
No Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 70) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Error Recovery Control supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
9 Power_On_Hours 0x0032 097 097 000 Old_age Always - 12588
12 Power_Cycle_Count 0x0032 091 091 000 Old_age Always - 8958
177 Wear_Leveling_Count 0x0013 089 089 000 Pre-fail Always - 131
179 Used_Rsvd_Blk_Cnt_Tot 0x0013 100 100 010 Pre-fail Always - 0
181 Program_Fail_Cnt_Total 0x0032 100 100 010 Old_age Always - 0
182 Erase_Fail_Count_Total 0x0032 100 100 010 Old_age Always - 0
183 Runtime_Bad_Block 0x0013 100 100 010 Pre-fail Always - 0
187 Uncorrectable_Error_Cnt 0x0032 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0032 073 051 000 Old_age Always - 27
195 ECC_Error_Rate 0x001a 200 200 000 Old_age Always - 0
199 CRC_Error_Count 0x003e 099 099 000 Old_age Always - 4
235 POR_Recovery_Count 0x0012 099 099 000 Old_age Always - 1958
241 Total_LBAs_Written 0x0032 099 099 000 Old_age Always - 92857573119
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Extended offline Completed without error 00% 1935 -
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
255 0 65535 Read_scanning was never started
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.
^ permalink raw reply [flat|nested] 13+ messages in thread* Re: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-30 8:44 ` Aw: " B A
@ 2021-03-30 20:17 ` Chris Murphy
2021-04-01 12:42 ` Aw: " B A
0 siblings, 1 reply; 13+ messages in thread
From: Chris Murphy @ 2021-03-30 20:17 UTC (permalink / raw)
To: B A; +Cc: Chris Murphy, btrfs kernel mailing list
On Tue, Mar 30, 2021 at 2:44 AM B A <chris.std@web.de> wrote:
>
>
> > Gesendet: Dienstag, 30. März 2021 um 00:07 Uhr
> > Von: "Chris Murphy" <lists@colorremedies.com>
> > An: "B A" <chris.std@web.de>
> > Cc: "Btrfs BTRFS" <linux-btrfs@vger.kernel.org>
> > Betreff: Re: Help needed with filesystem errors: parent transid verify failed
> >
> > On Sun, Mar 28, 2021 at 9:41 AM B A <chris.std@web.de> wrote:
> > >
> > > * Samsung 840 series SSD (SMART data looks fine)
> >
> > EVO or PRO? And what does its /proc/mounts line look like?
>
> Model is MZ-7TD500, which seems to be an EVO. Firmware is DXT08B0Q.
For me smartctl reports
Device Model: Samsung SSD 840 EVO 250GB
Firmware Version: EXT0DB6Q
Yours might be a PRO or it could just be a different era EVO. Last I
checked, Samsung had no firmware updates on their website for the 840
EVO. While I'm aware of some minor firmware bugs related to smartctl
testing, so far I've done well over 100 pull the power cord tests
while doing heavy writes (with Btrfs), and have never had a problem.
So I'd say there's probably not a "per se" problem with this model.
Best guess is that since the leaves pass checksum, it's not
corruption, but some SSD equivalent of a misdirected write (?) if
that's possible. It just looks like these two leaves are in the wrong
place.
> > Total_LBAs_Written?
>
> Raw value:
92857573119
OK I'm at 33063832698
Well hopefully --repair will fix it (let us know either way) and if
not, then we'll see what Josef can come up with, or alternatively you
can just mkfs and restore from backups which will surely be faster.
--
Chris Murphy
^ permalink raw reply [flat|nested] 13+ messages in thread
* Aw: Re: Re: Help needed with filesystem errors: parent transid verify failed
2021-03-30 20:17 ` Chris Murphy
@ 2021-04-01 12:42 ` B A
0 siblings, 0 replies; 13+ messages in thread
From: B A @ 2021-04-01 12:42 UTC (permalink / raw)
To: btrfs kernel mailing list; +Cc: Chris Murphy
Hi Chris,
> Gesendet: Dienstag, 30. März 2021 um 20:17 Uhr
> Von: "Chris Murphy" <lists@colorremedies.com>
>
> On Tue, Mar 30, 2021 at 2:44 AM B A <chris.std@web.de> wrote:
> >
> > > Gesendet: Dienstag, 30. März 2021 um 00:07 Uhr
> > > Von: "Chris Murphy" <lists@colorremedies.com>
> > > […]
> > > EVO or PRO? And what does its /proc/mounts line look like?
> >
> > Model is MZ-7TD500, which seems to be an EVO. Firmware is DXT08B0Q.
>
> For me smartctl reports
> Device Model: Samsung SSD 840 EVO 250GB
> Firmware Version: EXT0DB6Q
>
> Yours might be a PRO or it could just be a different era EVO. Last I
> checked, Samsung had no firmware updates on their website for the 840
> EVO. While I'm aware of some minor firmware bugs related to smartctl
> testing, so far I've done well over 100 pull the power cord tests
> while doing heavy writes (with Btrfs), and have never had a problem.
> So I'd say there's probably not a "per se" problem with this model.
> Best guess is that since the leaves pass checksum, it's not
> corruption, but some SSD equivalent of a misdirected write (?) if
> that's possible. It just looks like these two leaves are in the wrong
> place.
I'd rather go with the theory you (indirectly) raised a few days ago that my RAM may misbehave (when you suggested I run memtest). This is rather possible because I had difficulties understanding my BIOS and at some point I have accidentally enabled some overclocking. As I know this may cause the RAM to misbehave (and I don't have ECC RAM), this may as well be the reason.
>
> > > Total_LBAs_Written?
> >
> > Raw value:
> 92857573119
>
> OK I'm at 33063832698
>
> Well hopefully --repair will fix it (let us know either way) and if
> not, then we'll see what Josef can come up with, or alternatively you
> can just mkfs and restore from backups which will surely be faster.
Sadly it didn't (see other e-mail) but I think I'll go for the latter (mkfs and restore from backups) as I *think* my backups are fine and I don't want to waste more of your time (unless Josef wants to get his changes tested).
Thanks very much so far for the support and thanks for maintaining BTRFS :-)
Kind regards,
Chris
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2021-04-01 20:18 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-28 15:40 Help needed with filesystem errors: parent transid verify failed B A
2021-03-29 1:02 ` Chris Murphy
2021-03-29 1:12 ` Chris Murphy
2021-03-29 7:34 ` Aw: " B A
2021-03-29 8:09 ` Chris Murphy
2021-03-29 8:42 ` Aw: " B A
2021-03-29 13:36 ` Josef Bacik
2021-04-01 12:36 ` Aw: " B A
2021-03-29 7:36 ` Aw: " B A
2021-03-30 0:07 ` Chris Murphy
2021-03-30 8:44 ` Aw: " B A
2021-03-30 20:17 ` Chris Murphy
2021-04-01 12:42 ` Aw: " B A
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