Date   : Sat, 04 Jul 1987 13:33:28-EDT
From   : "Mark Becker" <Cent.Mbeck%OZ.AI.MIT.EDU@XX.LCS.MIT.EDU>
Subject: I've been given a disk drive!

..and don't know much about it.

     It's an old PerSci model 277 drive for 8" diskettes with a
voice-coil type head mover.  This thing drives two single-sided
diskettes with one spindle; there are two slots for diskettes.

     Even more fun: the spindle motor appears to be DC and is speed
controlled via some kind of servo control loop; there's a plastic ring
passing through an optodetector and the ring has lots of little black
lines etched in it.

     It does have a standard 8" 50-pin board edge for a push-on
connector.  However, the power connector is completely foreign to me;
uses a 9-pin Molex push-on connector.

     It was removed from working equipment so it might even still run.
Does anyone have information on this thing?  Will standard 8" disks
work in it?  Do the disks require servo information for head
positioning?

     Information will be appreciated.

Regards,
Mark