From: "David Griffith"
Subject: 8-inch drive substitutes
  I recently sold a Qumetrak 842 8-inch floppy drive to
a fellow who's
 restoring a CMI vintage synthesizer.  He says that this particular model
 is what the synth uses.  Can anyone think of a reason why he couldn't use
 some other model of drive as long as it's capable of reading DSDD media?
 
I've seen at least 3 different power connectors, so that could be a reason.
Maybe his drive uses voltages different from +5 and +24. I've also seen some
differences with regard to the position of the mounting holes. And then we
have of course half vs. full height.
Nico