Re: Why won't my HD do DMA I/O?

From: Bill Davidsen (davidsen@tmr.com)
Date: Mon Feb 11 2002 - 13:20:02 EST

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On Fri, 8 Feb 2002, Steve Snyder wrote:

> I've got a system on which the hard disk cannot be set to use DMA. When I
> attempt to enable DMA ("hdparm -d1 /dev/hda") on this drive, there is a long
> time-out period, after which displaying the settings shows that DMA is still
> not set.

You did build this kernel with DMA support in the kernel, right? For your
chipset? Vendor kernels have been known to err on the side of safty.

-- bill davidsen <davidsen@tmr.com> CTO, TMR Associates, Inc Doing interesting things with little computers since 1979.

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