Messages in this thread | | | Subject | Re: [PROBLEM] NFS trouble - file corruptions | From | Alan Cox <> | Date | 29 Nov 2002 14:32:52 +0000 |
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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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