On 09-06-27 08:21:22, Andy Campbell wrote: > I'm having an issue where when I copy files, they are not copying > correctly - they are corrupt, I've checked using cmp, and generating > md5sum There are no errors I can see from cp, rsync. > > Initially I though it was a problem with an external USB drives now > after some testing it seem to be normal SATA drives as well. I've > got a few drives in the box and they all have the same issue. > > I thought it might be memory - but memtest runs fine, and I > tried taking out a couple of the sticks - I have 4x2Gb no difference. > > I've written a little rsync script to copy some files around, rsync > once, then rsync again, using checksum - in theory the second run > should have nothing to do, but will randomly have to re-copy files. > > Strangely I tried booting off of a live distro ( System Rescue > 32bit ) and didn't get any errors. > > The system seem to run fine generally - but I started noticing some > of the big files I was syncing to external drives where erroring. > Just repeatedly running md5sum on a file gives consistent results - I > would have though if was a memory problem that would have give > different results. > > I've turned AHCI on in BIOS recently as I've install a WD Raptor, > and re-installed F10 - would that affect filesystems on other > drives - is AHCI buggy ? > > I'm using Fedora 10 64bit, Asus P5Q-E Motherboard, > Q9950 ( stock speed ), 8Gb Corsair memory > > Any guesses, Kernel bug ? Hardware ? Hopefully not hardware as its > a fairly recent build. ... I have an old ASUS MB that exhibited similar symptoms (1 bit error, same bit, about every 10 GiB copied to disk) from a likely different cause: the FSB and CPU clocks didn't have a simple harmonic relationship. I fixed the problem by setting a higher FSB speed. I think that that ASUS chipset has some problem with a FIFO. It's possible that ASUS still has problems with FIFOs, so you might look at the various BIOS bus speed settings. I hope you don't spend years tracking it down, though you're already ahead of me by noticing and documenting the problem. -- ____________________________________________________________________ TonyN.:' <mailto:tonynelson@xxxxxxxxxxxxxxxxx> ' <http://www.georgeanelson.com/> -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
