==== Original message from Stuart Henderson at 13-5-2008 22:15
On 2008-05-13, Daniel Polak <[EMAIL PROTECTED]> wrote:
I have a system with an IDE hard disk and CF-IDE adapter.
The CF-IDE adapter works fine with CF cards of 512 MB capacity and less.
As time goes by smaller capacity cards become more difficult to find so
I bought several 1 GB Kingston CF cards.
However these CF cards don't seem to work (on OpenBSD 4.3 stable). I
tried three empty 1 GB Kingston CF cards and they all prevent the system
from getting past loading the kernel.
I went back to a smaller card and then everything is fine.
The error message is
type: ata
c_bcount: 512
c_skip: 0
pciide0:1:0: bus-master DMA error: missing interrupt, status=0x21
Your card supports DMAs, but your adapter doesn't wire the required line.
This was a later addition to the CF spec, you can disable DMA with flags
to wd(4).
See http://lists.soekris.com/pipermail/soekris-tech/2007-May/012083.html
Thanks that looks like the cause of my problem!
Only thing is that I have probably have many CF-IDE adapters like this
and I'd need to use a custom kernel from now on or find enough of the
older Kingston CF/512 cards that do work.
Daniel
