Keith,
I am home now, and have the Western digital book in front of me. I quote from
the WD1002-WX1 Winchester Disk Controller writeup:
Controls up to two drives using Seagate Technology ST506
Supports drives of any configuration up to 1024 cylinders
and 16 R/W heads.
Compatible with WD1002S-WX2
The reason the Wedge people recommend the controllers they do is that they
have been tested and work well. Others that have been tested are either too
slow or they have not been figured out. There is a Western Digital RLL
controller that will work well, but I can't remember the model number. If you
are interested, please let me know. I'll try to find out for you which one it
is.
Regards, Larry.