OT: DMA troubles with Via KT600 chipset & hitachi hard drive
Paul W. Frields
paul at frields.com
Tue Nov 4 16:15:47 UTC 2003
On Tue, 2003-11-04 at 10:52, Tom Georgoulias wrote:
[...snip...]
> While copying some RPMs from a CD to the hard drive, I noticed the copy
> took a really long time and ran "hdparm -Tt /dev/hda" to see what the
> transfer speeds were. The buffered disk reads were somewhere in the
> neighborhood of 7MB/s, which lead me to believe DMA wasn't on. hdparm
> and dmesg confirmed that. I tried turning DMA on with hdparm to do some
> more testing, but I got the error:
>
> HDIO_SET_DMA failed: Operation not permitted
>
> We're running the latest RHL9 kernel, 2.4.20-20.9, a Hitachi 60GXP
> Deskstar drive, and using ATA-133 compatible cabling. My suspicion is
> the motherboard, a Gigabyte 7VT600-L based on the Via KT600. I'm not
> sure if the kernel we are using has support for a motherboard this new.
> Searching Google produced quite a few hits, but most were pretty old
> and all seemed to suggest that IDE driver support was lacking in those
> instances. So my question is, will the new Fedora Core 1 kernel have
> the support we need to get DMA working on this setup?
I believe you're correct. I have a number of KT600 boards on systems at
work, and Fedora Core 0.95 (plus current updates) works fine on all of
them with expected DMA support, whereas Red Hat Linux 9 did not. If you
hold off a few days and use BitTorrent to grab the Fedora Core 1 ISO
images you should be right as rain.
--
Paul W. Frields <paul at frields.com>
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