Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!sugar!ssd
From: ssd@sugar.hackercorp.com (Scott Denham)
Newsgroups: comp.periphs
Subject: Need info on Magnetic Peripherals HD
Keywords: CDC, Magnetic Peripherals #177461, Sperry Usernet
Message-ID: <7391@sugar.hackercorp.com>
Date: 28 Dec 90 04:46:45 GMT
Organization: Sugar Land Unix - Houston
Lines: 21

I've just acquired an old Sperry disk subsystem, consisting of a large
powered cabinet for 2 FH or 4 HH 5 1/4" drives, a Magnetic Peripherals
hard drive, and what is apparently a diffrerential SCSI to something
(ST-506?) controller.  It looks and sounds to be in working condition, but
I need to know the basic configuration of the hard drive 
 Description - Magnetic Peripherals (CDC) 
  PN - 77731603   P# 177461 
 The defect flag sticker indicates it's got at least 4 heads, and at least
 503 cylinders.  The interface LOOKS to be ST-506 - at least it uses the
 same cable set. The small user's manual that was packed with it suggest
 that the drives are 30Mb, if in fact this is the original drive.  
I'd greatly appreciate any information anyone could provide on this gear,
and for that matter on the Sperry controller board.  Is there a reasonably
simple way to get from differential SCSI to single ended SCSI? If so I
would like to know the capabilities of the controller board as far as 
supported drive capacities, etc. 
Thanks in advance for any light shed on this mystery box ....
   
   Scott Denham 
    ssd@sugar.hackercorp.com