Re: Corruption

[Martin Stone <martin.stone@xxxxxx>]

Sounds like disk problems... but weird ones.  Have you fsck'ed lately?  Here's a 
really WEIRD suggestion... try creating an archive, then creating another 
archive, then seeing if you get the same error on the second one... if there 
just happens to be a bad spot on the disk where you're trying to create that 
archive, the first one will take up the space and the second one would hopefully 
be on a cleaner part of the disk.  If you get an error on the second one too, i 
dunno man... that's pretty weird.  Maybe leave those two archives on the disk 
and fsck?  If there is a file with a bad block in it (rather than a bad block in 
free space) I would think fsck would pick right up on it.

J.L. Coenders wrote:
> Ok,
> I did more extensive tests now.
> $tar cf - Mail | tvf -
> gives no errors.
>
> $ tar czf - Mail | tar tzvf - 
> gives no error either.
>
> For the mail and for other files.
> However, when I start writing to a file, things go wrong:
> $ tar tzvf <archive> 
> starts reporting errors and
> $ tar dzf <archive>
> starts reporting differences.
>
> However, when I nfs the files to another computer, I can tar & gzip the files, 
> the test reports no errors and the difference test reports no differences.
>
> But what is strange is that when I tar & gzip from the other computer over the 
> nfs-mount, it starts giving the errors again.
>
> Any ideas?
> Jeroen
>
> On Friday 30 April 2004 16:57, Martin Stone wrote:
>
> > what happens when you do it without compression?  As a test, try:
> >
> > tar cf - Mail | tar tvf -
> >
> > Then, if that works with no problems:
> >
> > tar czf - Mail | tar tzvf -
> >
> > If that works, the only thing left that I can think of is serious disk
> > problems... let me know if those commands report errors or not though...
> >
> > J.L. Coenders wrote:
> >
> > > > Does the corruption happen with different sources to tar/gzip/bzip2?
> > >
> > > I am now testing some other sources. It seems to happen with large files.
> > >
> > >
> > > > Does while archiving in verbose mode appear any error message?
> > >
> > > No, the archiving itself does not give any messages. The testing does.
> > >
> > >
> > > > What are the commands you run?
> > >
> > > $ tar cvzf mail.tar.gz Mail
> > > or
> > > $ tar cvjf mail.tar.bz2 Mail
> > >
> > > For the testing I use:
> > > $ tar tvzf mail.tar.gz
> > > or
> > > $ tar tvjf mail.tar.bz2
> > >
> > >
> > > > Compression errors often occurs because of bad/damaged RAM.
> > >
> > > I do not seem to have other problems, which you would expect with bad or
> > > damaged RAM.
> > >
> > > Jeroen