yOn Mon, 20 Mar 2000, Ove Ewerlid wrote:
> Andre Hedrick wrote:
> >
> > That is because one could enable the chipset with out AUTODMA and then
> > try, but crash the system, to retune the drive but the chipset is still
> > set at PIO 0. Thus attempting to do DMA transfers from the drive to a
> > PIO 0 configured host adapter will CRASH........
> >
> > This will be fixed or is pixed in 2.3.99pre2
>
> Just tried it with 2.3.99pre3 and the DMA crash is still there (20262
> chipset).
> Still works fine with no DMA (at reduced speed).
> (This time I saw a crash error message saying that DMA was attempted
> while
> not supported by the chipset, consistent with what you say above.)
Mar 20 02:20:43 p6dnf kernel:
PDC20262: ROM enabled at 0xfebb0000
PDC20262: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI Mode.
PDC20262: FORCING PRIMARY MODE BIT 0x00 -> 0x01 MASTER
PDC20262: FORCING SECONDARY MODE BIT 0x00 -> 0x01 MASTER
ide0: BM-DMA at 0xef00-0xef07, BIOS settings: hda:DMA, hdb:DMA
ide1: BM-DMA at 0xef08-0xef0f, BIOS settings: hdc:DMA, hdd:pio
hda: QUANTUM FIREBALL ST6.4A, 6149MB w/81kB Cache, CHS=13328/15/63, UDMA(33)
hdb: QUANTUM FIREBALL ST3.2A, 3079MB w/81kB Cache, CHS=782/128/63, UDMA(33)
hdc: QUANTUM FIREBALLP KA9.1, 8809MB w/371kB Cache, CHS=17898/16/63, UDMA(66)
I went and dug-out this card see if it was broken and it is not.
Andre Hedrick
The Linux ATA/IDE guy
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This archive was generated by hypermail 2b29 : Thu Mar 23 2000 - 21:00:29 EST