Kim,
I added the second hard drive to my 2500, but it was two or three years
ago. As best I can recall, I had to get a new SCSI cable that attached
the SCSI to the 2091 in the middle of the cable, and each end attached to
one of the drives. I put the second drive on the 2091 card, and left the
original right where it was. Since the drives had different SCSI numbers,
the system recognized them automatically. I just had to be careful to get
the cables lined up and turned the right way before connecting them to the
drives, etc. – pin one to pin one, rather than pin one to pin 50, etc.
—Betty