Re: BTRFS: bdev /dev/mapper/dshelf1 errs: wr 2970, rd 848, flush 0, corrupt 189, gen 0

[Hugo Mills <hugo@carfax.org.uk>]

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On Sun, Jan 17, 2016 at 04:27:48PM -0800, Marc MERLIN wrote:
> So, I had an FS with a few issues, I ran btrfs check --repair to completion
> 
> Then, after mounting, I still get this warning.
> Shouldn't those error counters be reset after check --repair?
> 
> Kernel: 4.2.5
> Btrfs-tools: 4.3-1
> 
> If that matters, here's the output of check --repair (captured with script
> -f, so the output is a bit wrong):
> gargamel:~# btrfs check --repair -p /dev/mapper/dshelf1
> enabling repair mode
> Checking filesystem on /dev/mapper/dshelf1
> UUID: 6358304a-2234-4243-b02d-4944c9af47d7
> badcextentx[29368320, 29372416), type mismatch with chunk
> bad extent [29372416, 29376512), type mismatch with chunk
> 
> (2856970 lines deleted)
> 
> bad extent [8697338122240, 8697338126336), type mismatch with chunk
> bad extent [8697338126336, 8697338130432), type mismatch with chunk
> bad extent [8697338130432, 8697338134528), type mismatch with chunk

   This is, I think, a symptom of an FS created with a broken
mkfs.btrfs, and it needs to be re-created. Take a look for that error
message in the mailing list archives -- there's been a few posts about
it in the last couple of months.

   Hugo.

> checking extents [.]
> 
> repaired damaged extent references
> 
> Fixed 0 roots.
> cache and super generation don't match, space cache will be invalidated
> Fixedidiscountofileoextents for inode: 204450 in root: 45851
> FixedidiscountofileOextents for inode: 204452 in root: 45851
> root 45851 inode 204452 errors 40, bad file extent
> Fixedidiscountofileoextents for inode: 204452 in root: 45851
> root 45851 inode 204452 errors 40, bad file extent
> rootk45851sinodes204452 errors 40, bad file extent
> FixedidiscountofileOextents for inode: 204450 in root: 45852
> FixedidiscountofileOextents for inode: 204452 in root: 45852
> checking fs roots [o]
> rootk45851sinodes204452 errors 40, bad file extent
> Fixedidiscountofile.extents for inode: 204450 in root: 45856
> Fixed discount file extents for inode: 204452 in root: 45856
> rootk45851sinodes204452 errors 40, bad file extent
> warninggliner3653 [o]
> 
> checking csums
> checking root refs
> found 9826147025859 bytes used err is 0
> total csum bytes: 9584068648
> total tree bytes: 12200706048
> total fs tree bytes: 330457088
> total extent tree bytes: 498716672
> btree space waste bytes: 1372963760
> file data blocks allocated: 9976766078976
>  referenced 9987816431616
> btrfs-progs v4.3
> 
> Thanks,
> Marc

-- 
Hugo Mills             | In my day, we didn't have fancy high numbers. We had
hugo@... carfax.org.uk | "nowt", "one", "twain" and "multitudes".
http://carfax.org.uk/  |
PGP: E2AB1DE4          |

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