VIA vt82c686b and UDMA(100)

Brian Dushaw (dushaw@munk.apl.washington.edu)
Wed, 21 Mar 2001 20:40:21 -0800 (PST)


Dear Linux Kernel Wisemen,
I have been following the discussion of the VIA vt82c686b chipset
and the troubles people have had in getting UDMA(100) to work. This
is to report that I have now tried the 2.4.2-ac20 kernel and the
2.2.18 kernel with Andre's patch (dated March 20) and neither of
them get the disk speed up to where it ought to be. hdparm -t reports
back 11 MB/s or so for either kernel.
VIA82CXXX enabled, and I also tried the ide0=ata66 flag, in desparation.
At boot up both kernels report the disk as UDMA(100) - everything
seems to be peachy keen, but for the sluggish disk performance.

Merely a report from the front lines,

B.D.

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