DEC PWS500au (MiataGL) EIDE Issues

All,

I’m trying to install NetBSD 9.1 on my Personal Workstation 500au
(MiataGL), and I’m running into EIDE issues. Whenever I try to access any
attached EIDE disk (or SATA disk, with a SATA/IDE bridge) I get the
following:

wd0c: device timeout reading fsbn 9 (wd0 bn 0; cn 0 tn 0 sn 0), xfer 38,
retry 0
cypide0:0:0: geometry timed out

This happens across a bunch of disks, with several different IDE cables,
both 40 and 80 conductor.

Does anyone have any ideas?

I’m using the latest SRM, 7.2-1. From AlphaBIOS, I can create, delete, and
format the disks, which makes me think that the hardware is OK.
Unfortunately, I have the older PCI/ISA riser in my machine, thus no
onboard qlogic isp 1040.

Thanks!
- Alex