Re: SunFire v100 / Acer M5229 IDE DMA error workaround

[Jochen Kunz <jkunz%unixag-kl.fh-kl.de@localhost>]

On Thu, 30 Oct 2008 01:45:01 -0400
Rafal Boni <rafal%pobox.com@localhost> wrote:

> It's still quite possible the controller really doesn't have two fully
> independent channels (or channel register sets)
The Sun Netra X1 / T1 use the same:
aceride0: Acer Labs M5229 UDMA IDE Controller (rev. 0xc3)
and I had problems with it when both cannels where active.
If I run "dd if=/dev/zero of=/dev/wd[01]c" to wd0 and wd1 in parallel I
got DMA errors. A dd(1) to a single disk made no problems.
-- 


tschüß,
       Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/