Re: Kernel 2.0.34-pre4 and IDE

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 31 Dec 1998 02:15:07 +0000 (GMT)

> tests) maybe not the best tests.. however in 2.0.37-pre4 i got a slow 1.83
> out ofit constantly.. it even performed very slowly in large empty fle
> writes whe i oved back a kernel.. it worked as well as it ever did. and
> the 2.1.132/2.0.0-pre1 mix.. worked perfectly with that..

2.0.37pre4 is more cautious about setting certain IDE options

> PIIX3: not 100ative mode: will probe irqslater
> ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
> ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio
>
> Dec 29 20:14:11 jim kernel: hda: WDC AC38400L, ATA DISK drive
> Dec 29 20:14:11 jim kernel: hdc: QUANTUM BIGFOOT_CY4320A, ATA DISK drive

Do all kernels report the drives as DMA ?

> Anyone else have any problems with similar drive/controller combinations
> under 2.0.37pre4 with the new IDE code?

See if using hdparm to turn on multisector speeds it back up

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