[linux-lvm] blkid_wiping breaks snapshots

[Zdenek Kabelac]

Dne 8.2.2014 00:55, Christian Hesse napsal(a):
> Christian Hesse <list at eworm.de> on Sat, 2014/02/08 00:36:
>> Hello everybody,
>>
>> I think I nailed it down with git bisect. My first bad commit is:
>>
>> 75628f341ad38b68aae33eae0b5700be2a6e5769
>> configure: enable blkid_wiping by default if the blkid library is present
>>
>> Looks like this wipes data that is still needed... Building a package with
>> '--disable-blkid_wipe' now to verify on another system.
>
> Uh, this only helps part of...
>
> I changed my test setup and used writable snapshots. After that I got:
>
> WARNING: DM_snapshot_cow signature detected on /dev/cvg/snap-home at
> offset 0. Wipe it? [y/n]
>
> (see https://bbs.archlinux.org/viewtopic.php?id=176504 for another report)
>
> Looks like disabling blkid_wiping fixes this. My snapshot corruption still
> occurs though. :-/
> Bad thing about it is that the corruption does not occur reliable when doing
> simple tests in 'git bisect'... Out of ideas for now - Will go to bed now.

Now this was helpful, I guess I think what is going on.

Zdenek