🚀 go-pugleaf

 > I have recently placed an order for the OS/2 developers CD-ROM and
 > I would like to add a CD-ROM drive to my system which currently has
 > a Ultrastor ESDI controller and drive(s).
 > Does anyone know if it is possible to have a SCSI controller and
 > ESDI controller co-resident.

Yes.

 > If so, which one is recommended?

To have the best software support, go with either Future Domain or
Adaptec.  After a good deal of research I concluded that the best bang
for the buck was the Adaptec "Multimedia Connection", which includes
the 1510 host adapter and DOS software drivers -- about $170 at Fry's
Electronics in Sunnyvale, CA.  (The 152x and 154x host adapters are
overkill for CD-ROM.)  If you are only concerned with OS/2, which
includes Adaptec drivers, you could try to find the 1510 naked.

 > Which CD-ROM drive would then be a good choice?

The most widely supported drive is Toshiba, with NEC close behind.  I
went with the fast Toshiba XM-3301B (about $400 on the street) as the
best bang for the buck.  The faster (double-speed) NEC CDR-84 is over
$100 more expensive.

Best regards,
John