Re: 2.1.111: IDE DMA disabled?

Linus Torvalds (
Sat, 25 Jul 1998 18:22:49 -0700 (PDT)

On Wed, 25 Mar 1998, Gadi Oxman wrote:
> The configuration on which the filesystem corruption was observed is a
> Tyan Tomcat III board + WD 2.2GB drive; that motherboard is using the
> 430HX chipset, which pre-dates Ultra-DMA and doesn't support CRC check.

Which implies that at _least_ we need to disable DMA automatically if it's
one of those chipsets.

Personally, I never understood why DMA was enabled by default anyway. As
far as I can tell the only sane thing is to have it always disabled by
default, and enable it with hdparm.


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