My advice - get a cheap 2.5" IDE drive and an IDE->SCSI converter. It's cheaper and better than a SCSI one. Don't know if such a converter will fit with a 2.5" drive in an A1200 desktop case, though...
The controller native in the A1200 is IDE. I am assuming that Jose is speaking about a SCSI card connected to the A1200 in addition to the IDE on the motherboard.
I have basically the same question. With an adapter UW-SCSI controllers can handle 50 pin SCSI1 and SCSI2 drives, but can the older SCSI cards types 1 and 2 with 50 pins handle the 68 pin UW drives? 50 pin SCSI drives are getting hard to find for the old A4000