File system corruption

[Wayne Walker]

On 10/12/2012 07:14 PM, Dave Chinner wrote:
<snip>
> And SB/AGF 3 and 4 are ok, too. So, the filesystem headers just beyond 
> the 2TB offset are zero. That tends to point to a block device 
> problem, as an offset of 2TB is where a 32 bit sector count will 
> overflow (i.e. 2^32). Next step is to run blktrace/blkparse on the cp 
> workload that generates the error to see if anything actually writes 
> to the 2TB offset region, and if so, where it comes from. Probably 
> best to compress the resultant blkparse output file - it might be 
> quite large but the text will compress well. Cheers, Dave. 

Dave,

Thank you for your help.

10 MB .gz file at http://rx-7.bybent.com/blktrace.sde1.out.gz

What I can see seems to have most of the writes are around 2^31.

Wayne