Check the DS jumpers and the cable. Sounds like the controller thinks both are
A:, or the cable is reversed. The end with the "twists" (pins 10-16 I think)
should be on the A: drive, not on the controller. I've found a few "bad"
machines
that supposed experts have worked on done in reverse. Also a foam swab and
denatured alcohol on the heads cleans them up rather well.
Merle K. Peirce wrote:
  I believe we have one 5160 with full height drives,
and one with half
 height.  I don't think either boots properly.  Now at least we can get
 them cosmetically cleaned up.  As I recall they both seem to poll both
 drives at once, or something weird like that.  Shortly after I looked at
 them, we lost power due to renovations, and that was 18 months ago.  I'll
 have to start all over again.
 On Mon, 15 Mar 1999, Tony Duell wrote:
 
 Actually, it was the 5160 I was curious about.  Were they still using the
 full height drives on them? 
 Yes. I have a 5160 in front of me here with official IBM-badged drives
 that I believe to be original. And a couple more similar machines upstairs.
 All are full-height Tandon mechanisms.
 -tony
 
 
 M. K. Peirce
 Rhode Island Computer Museum, Inc.
 215 Shady Lea Road,
 North Kingstown, RI 02852
 "Casta est qui nemo rogavit."
               - Ovid