Re: Error during balancing '/': Input/output error

[Michael Ruiz <michael@mruiz.dev>]

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> There are quite some reports about this problem. So far no real
> corrupted confirmed.
>
> You can confirm it by scrub.
>
> I'm afraid there is some bug in data balance code which leads to this.
> We will dig further to pin down the cause.
>
> BTW, does that problem always show up at block group 253562454016? Or it
> randomly shows up at different block groups?
>
> Thanks,
> Qu

Hi Qu,
It appears to be the same data blocks giving me this issue. I have tried it 
while mounting from a bootable usb and in my arch linux install both with 
similar results. I should also mention I have a btrfs root partition within a 
luks lvm partition becuase btrfs provides no encryption. I'm not sure this 
makes a difference. Would you suggest running somekind of disk check or by 
running scrub? Please let me know what I should try to resolve this.
谢谢

``` BEGIN DEBUG INFO ```
ERROR: error during balancing '/': Input/output error
[michael@linux /]$ dmesg | tail
[  462.460626] audit: type=1104 audit(1577525576.905:124): pid=3415 uid=0 
auid=1000 ses=1 msg='op=PAM:setcred grantors=pam_unix,pam_permit,pam_env 
acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 
res=success'
[  465.880807] BTRFS info (device dm-1): found 25 extents
[  470.501319] BTRFS info (device dm-1): found 25 extents
[  471.713073] BTRFS info (device dm-1): relocating block group 253562454016 
flags data
[  472.251356] BTRFS warning (device dm-1): csum failed root -9 ino 262 off 
1048576 csum 0x9a7afaa8 expected csum 0x63e15594 mirror 1
[  472.254390] BTRFS warning (device dm-1): csum failed root -9 ino 262 off 
1048576 csum 0x9a7afaa8 expected csum 0x63e15594 mirror 1
[  472.716215] BTRFS info (device dm-1): balance: ended with status: -5
[  473.122721] audit: type=1106 audit(1577525587.565:125): pid=2775 uid=0 
auid=1000 ses=1 msg='op=PAM:session_close 
grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" 
hostname=? addr=? terminal=/dev/pts/3 res=success'
[  473.122840] audit: type=1104 audit(1577525587.565:126): pid=2775 uid=0 
auid=1000 ses=1 msg='op=PAM:setcred grantors=pam_unix,pam_permit acct="root" 
exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/3 res=success'
[  629.160619] audit: type=1131 audit(1577525743.603:127): pid=1 uid=0 
auid=4294967295 ses=4294967295 msg='unit=packagekit comm="systemd" exe="/usr/
lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
``` END DEBUG INFO ```

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