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