On 2019-11-02 12:38, Qu Wenruo wrote:
On 2019/11/2 上午9:13, Tomasz Chmielewski wrote:
I'm getting these recently from time to time (first noticed in 5.3.x,
but maybe they were showing up before and I didn't notice).
Everything seems to work fine so far. Anything to worry about?
This is a warning about unaligned device size.
You can either fix it by reducing the device size by 4K for each
device,
or use btrfs rescue fix-dev-size unmounted to repair.
Unfortunately "btrfs rescue fix-device-size" doesn't seem to help. I'm
still seeing these entries in dmesg some time after using the command.
Also:
# umount /home
# btrfs rescue fix-device-size /dev/sdb4
Fixed device size for devid 2, old size: 3950855921152 new size:
3950855917568
Fixed device size for devid 3, old size: 3950855921152 new size:
3950855917568
Fixed super total bytes, old size: 7901711842304 new size: 7901711835136
Fixed unaligned/mismatched total_bytes for super block and device items
# btrfs rescue fix-device-size /dev/sdb4
No device size related problem found
# btrfs rescue fix-device-size /dev/sda4
No device size related problem found
# dmesg -c
# mount /home
Now let's try to unmount and see what "btrfs rescue fix-device-size"
shows again - I'd expect "No device size related problem found",
correct?
# umount /home
# btrfs rescue fix-device-size /dev/sda4
parent transid verify failed on 265344253952 wanted 42646 found 46119
parent transid verify failed on 265344253952 wanted 42646 found 46119
parent transid verify failed on 265344253952 wanted 42646 found 46119
Ignoring transid failure
Fixed super total bytes, old size: 7901711842304 new size: 7901711835136
Fixed unaligned/mismatched total_bytes for super block and device items
# btrfs rescue fix-device-size /dev/sda4
No device size related problem found
# btrfs rescue fix-device-size /dev/sdb4
No device size related problem found
# mount /home ; umount /home
# btrfs rescue fix-device-size /dev/sdb4
parent transid verify failed on 265344253952 wanted 42646 found 46119
parent transid verify failed on 265344253952 wanted 42646 found 46119
parent transid verify failed on 265344253952 wanted 42646 found 46119
Ignoring transid failure
Fixed super total bytes, old size: 7901711842304 new size: 7901711835136
Fixed unaligned/mismatched total_bytes for super block and device items
# mount /home
Tomasz Chmielewski
https://lxadm.com
