On Fri, 2002-11-29 at 13:17, Rasmus Bøg Hansen wrote:
> I just tried turning off DMA on the server disk (this is just a low-end
> IDE-system): No errors in files (compressing the file thrice).
>
> So it does not at all seem to be a NFS-issue!
>
> I have no idea what is wrong. If the disk, cable or IDE controller does
> bit-flipping when DMA is turned on, why is the problem only seen with
> NFS? I have never seem corrupted files or metadata with DMA turned
> (except once long ago, when I experimented with high-transfer-modes - I
> haven't done that since)...
More likely it changes the timings. There is at least one other
possibility though. With some via bridges using slightly too slow DDR
RAM at a 133MHz clock works reliably _until_ you get a mix of CPU and
DMA traffic. It'll even pass memtest86.
So if its a VIA box, turn DMA back on, stick the bios into its load
failsafe defaults mode and see if that has an affect.
Alan
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This archive was generated by hypermail 2b29 : Sat Nov 30 2002 - 22:00:22 EST