Ah yes--when it was cheaper to change the drive than
the controller!
AFAIK, almost all 5.25' 1.2M drives had some sort of dual-speed 300/360
RPM capability under the hood, even if it wasn't publicized. Much like
some 3.5" 1.44MB drives today. >
Since both 720K and 1.44M 3.5" disks (on a PC) rotate at 300 rpm, I am
trying to figure out why you'd want a 360rpm 3.5" drive. I've never seen
one...
(600 rpm is another matter...)
-tony