Messages in this thread | | | Date | Tue, 21 Mar 2000 12:56:55 -0800 (PST) | From | Andre Hedrick <> | Subject | Re: [2.3.99pre2] [CORRUPTION] Doh! Corruption problems again... |
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On Tue, 21 Mar 2000, Simon Kirby wrote:
> On Tue, Mar 21, 2000 at 12:16:22PM -0800, Andre Hedrick wrote: > > > On Tue, 21 Mar 2000, Simon Kirby wrote: > > > > > - hdparm -u 1 vs hdparm -u 0 on all drives does not seem to make a > > > difference. > > > > > > - hdparm -d 0 vs hdparm -d 1 on all drives tends to make the problem > > > happen even more often (guessing 5 times as often). Tested with > > > both -u 1 and -u 0. > > > > What is the rest of the hardware list? > > You are fingering the difference between DMAING and PIO. > > If you are trying to DMA with out autodma........you can and usually will > > be "SHAFTED"! > > What do you mean by trying to DMA without autodma? > > I'm using an ASUS P2B-DS (PIIX4 tuning and all enabled in kernel config) > with two Celerons. 128MB ECC SDRAM. Three WD hard drives are attached: > > hda: WDC WD273BA, 26105MB w/1961kB Cache, CHS=3328/255/63, UDMA(33) > hdb: WDC WD273BA, 26105MB w/1961kB Cache, CHS=3328/255/63, UDMA(33) > hdc: WDC AC28400R, 8063MB w/512kB Cache, CHS=16383/16/63, UDMA(33) > > The first two are UDMA/66 drives, but everything is plugged into the > UDMA/33 on-board controller.
OH MY !!!!............
You know that WDC blows of the UDMA CRC and you are pumping data at ATA-3/4/5 trasfer rates with ATA-2 correction/dectection, which equals NONE!!!!!!!!
Please send me a copy of 'lspci -bxxxs 00:07.1 > piix4.pci'
> Not using "hdparm" at all after boot still shows the the same problems. > > The case where the problem shows up more with PIO mode looks just like > the previous problem with the elevator changes -- the timing and/or > slower I/O made it show up more easily... I don't think it has anything > to do with incorrect settings (although I may be wrong)... > > Simon- > > [ Stormix Technologies Inc. ][ NetNation Communcations Inc. ] > [ sim@stormix.com ][ sim@netnation.com ] > [ Opinions expressed are not necessarily those of my employers. ] >
Andre Hedrick The Linux ATA/IDE guy
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