Hi Alexander,

On Mar 16, 2013, at 2:21 AM, Alexander Bezrukov wrote:

> 
> Hi Vyacheslav,
> 
>> Had you any snapshots on this volume?
> 
> Unfortunately no. I had had one but have recently converted
> t to an ordinary cp.
> 
>> It needs to investigate the issue more deeply. Could you
>> try to mount this volume under another system? I hope that
>> it gives opportunity to get more details about the issue
>> from system log. So, could you share NILFS2 related messages
>> for such try?
> 
> This is what I've indeed done in the first place.
> 
>>> NILFS: Invalid checkpoint (checkpoint number=5439464)
>>> NILFS: error loading last checkpoint (checkpoint number=5439464)
> 
> In fact, these lines I have copied from the system log of another
> system (with some some debian distro kernel 3.2.0). But this is
> exactly how my original kernel complains too.
> 

Ok. I think that maybe I will prepare special patch with additional debug 
output for deeper investigation and understanding situation on your volume. But 
initially I need to have the whole picture of your volume. Namely, I need in 
debug output of fsck.nilfs2 utility. Moreover, could you share output of 
"nilfs-tune -l" utility?

>>> To my best knowledge there is no "official" fsck tool for nilfs2
>>> but at times nilfs2 has just been added to the mainline kernel I
>>> read somewhere about some "unofficial" version at some developer
>>> branch.
>> 
>> I send you personally archive with actual state of fsck.nilfs2.
>> I need in debug output of the fsck.nilfs2 for analysis of situation
>> on the volume.
> 
> I am sorry, I didn't receive any archive.
> 

It is strange. Now you can download nilfs-utils archive with last actual 
version of fsck.nilfs2 from 
http://dubeyko.com/development/FileSystems/NILFS/nilfs-utils-fsck-v.0.04-under-development.tar.gz.
 Unfortunately, I haven't enough time for further implementation of fsck during 
last two months. But I am going to continue implementation. So, fsck can check 
only superblocks and segment summaries. But debug output of current state of 
fsck.nilfs2 will be very helpful for getting picture of the volume. Please, 
compile utilities set with fsck and run "fsck -v debug [device] 2> 
[output-file]". Then, please, share only with output file because it will have 
significant size.

Thanks,
Vyacheslav Dubeyko.

>> I hope that we can recover your volume. But, anyway, we need to analyze
>> the issue and try to cure the volume.
> 
> For me the latter is even more important.
> 
> Best regards.
> Alexander Bezrukov
> 
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