Floppy cable won't work. If you want to use the cable cut the second
connector off and make it a single connector straight through cable.
Another problem I had with early MFM hard drives was they needed to be
read with the same model of controller that formatted them.
For the ST225 look for a DTC 5150 or a western digital 1002-WX1 HD
controller. These were two of the most common HD controllers for XTs.
I doubt that you can read them with any of the 16 bit cards.
When I put away any XT drives that I wanted the data off I kept the
cables and controller card with the drive.
--
Paxton Hoag
Astoria, OR
USA