On Mon, Mar 14, 2005 at 12:10:58AM -0500, Chris Allegretta wrote:
> Hello,
> 
>       I am trying to install NetBSD 2.0 on an HP 736N (amd64) box. 
> The boot eventually hangs; here is a copy of the error (apologies for
> typos, as I cant get the install to proceed I had to copy down the
> error by hand):
> 
> siside0:0:0: lost interrupt
>     type: ata tc_bcount: 512, tc_sckip: 0
> siside0:0:0: bus-master DMA error: missing interrupt, status=0x21
> siside0:0:0: device timeout, c_bcount=512, c_skip0
> wd0: transfer error, downgrading to PIO mode 4
> wd0(siside0:0:0): using PIO mode 4
> wd0d: device timeout reading fsbn0 (wd0 bn 0, tn 0, sn 0), retrying.
> 
> This happens with both the i386 and amd64 builds on this machine.  I
> did attach a boot log from FreeBSD which I have been using on the
> machine in the meantime, as FreeBSD and Linux seem to work fine and
> without complaint, so I did not suspect a hardware issue at this
> point.  Has anyone run into this?

Looks like an interrupt routing issue. I don't remember the details, but
there are other messages on this list about this, and how to workaround.
Check the archives.

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--