< The only PC ESDI controllers I have ever found all have 2 data cable < connectors (20 pin on the card), which can each connect to one drive onl < same as MFM. In fact right now I can't think of any differences between < and MFM cabling for PC's. Not sure about the twist details though. EDSI does not generally use the twist unless that was a PC hack. The Ultrastor EDSI controllers I hav elaying around use the esact cabling as a pair of MFM drive on a WD 1003/5/6 controller. The only thing in PCs I know of that use a twist cable is Floppies. Allison