Re: read time tree block corruption detected

[Peter Luladjiev <luladjiev@gmail.com>]

Should I run with repair flag?

On Fri, 17 Jan 2020 at 09:51, Peter Luladjiev <luladjiev@gmail.com> wrote:
>
> Here is the output:
>
> btrfs check --force --mode lowmem /dev/mapper/system-root
>
> Opening filesystem to check...
> WARNING: filesystem mounted, continuing because of --force
> Checking filesystem on /dev/mapper/system-root
> UUID: 9639a3e6-cd08-4270-b4d1-d2946d2b8d2e
> [1/7] checking root items
> [2/7] checking extents
> [3/7] checking free space cache
> btrfs: space cache generation (539645) does not match inode (539641)
> failed to load free space cache for block group 22020096
> btrfs: space cache generation (539645) does not match inode (539641)
> failed to load free space cache for block group 1095761920
> btrfs: space cache generation (539643) does not match inode (539640)
> failed to load free space cache for block group 102161711104
> [4/7] checking fs roots
> [5/7] checking only csums items (without verifying data)
> [6/7] checking root refs done with fs roots in lowmem mode, skipping
> [7/7] checking quota groups skipped (not enabled on this FS)
> found 53501751296 bytes used, no error found
> total csum bytes: 43476196
> total tree bytes: 1552203776
> total fs tree bytes: 1422196736
> total extent tree bytes: 70172672
> btree space waste bytes: 276902557
> file data blocks allocated: 331882188800
>  referenced 105424904192
>
> On Fri, 17 Jan 2020 at 09:34, Nikolay Borisov <nborisov@suse.com> wrote:
> >
> >
> >
> > On 16.01.20 г. 18:53 ч., Peter Luladjiev wrote:
> > > Hello, thanks for helping, here is the output:
> > >
> > > btrfs check --force /dev/mapper/system-root
> > >
> > > Opening filesystem to check...
> > > WARNING: filesystem mounted, continuing because of --force
> > > Checking filesystem on /dev/mapper/system-root
> > > UUID: 9639a3e6-cd08-4270-b4d1-d2946d2b8d2e
> > > [1/7] checking root items
> > > [2/7] checking extents
> > > ref mismatch on [1497018368 4096] extent item 72057183177116417, found 1
> > > incorrect local backref count on 1497022464 parent 51611369472 owner 0
> > > offset 0 found 1 wanted 3087007745 back 0x564582174c70
> > > backpointer mismatch on [1497022464 4096]
> > > ERROR: errors found in extent allocation tree or chunk allocation
> > > [3/7] checking free space cache
> > > [4/7] checking fs roots
> > > [5/7] checking only csums items (without verifying data)
> > > [6/7] checking root refs
> > > [7/7] checking quota groups skipped (not enabled on this FS)
> > > found 53532647424 bytes used, error(s) found
> > > total csum bytes: 43476204
> > > total tree bytes: 1551368192
> > > total fs tree bytes: 1421295616
> > > total extent tree bytes: 70238208
> > > btree space waste bytes: 276638054
> > > file data blocks allocated: 331679563776
> > >  referenced 105423634432
> > >
> >
> >
> > Right so it seems this the only error. Just to be sure run btrfs check
> > --mode lowmem  since it provides more readable output. If this is the
> > only error in the filesystem then btrfs check --repair --mode lowmem
> > should be able to fix it.