[clug] [UNCLASSIFIED] Curious filesystem error

[Robert]

Its entirely possible for bad sectors on a disk to be coincidentally all 
inside one file.
If fsck says theres a problem, there probably is.

You're probably best off reformatting the disk or other measures that 
determine bad blocks and put them into the bad block list.


Antti.Roppola at brs.gov.au wrote:

> Hi all,
>  
> Last night I was converting some MPEG files into VCD mages and
> struck an odd problem:
> 
> I have an MPEG file that generates fread() errors and alarming
> bad block messages into the syslog when attempting to read that
> file. Umounting the disk and running fsck found all sorts of
> problems.
> 
> Initially I thought it was a disk fault, but all other files work.
> It seems to be any attempt to read that file from (that?) disk
> generates errors. The MPEG file was created (amongst many others)
> that work perfectly) using ffmpeg. I did all manner of stress testing
> with other files and no problems.
> 
> I'm running a 2.4 kernel, the disk in on /dev/hdb (aka the same
> controller as the primary system disk).
> 
> I've been trying to identify what portion of the file cause the problem.
> It's about 200 Mb into a 700 Mb file, but trying to chop that portion out
> has been tricky in that it causes more errors.
> 
> Antti
> P.
> 
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