On 6/9/2007 5:01 PM, Carl Lowenstein wrote:
All right, somebody who was at the Technical Bookstore InstallFest
last week was familiar with DDC drums. Who, when, or is my memory
acting up on me?
---------- Forwarded message ----------
From: Guy Sotomayor <[EMAIL PROTECTED]>
Date: Jun 9, 2007 4:19 PM
Subject: DDC Fixed Head Disks
To: [EMAIL PROTECTED]
Hi,
I just received a DDC (Digital Development Corporation) 6200X series
fixed head disk. It includes all of the cables, power supplies and
controller for a PDP-11. Before I hook it up to one of my 11's, does
anyone have any docs on this beast?
Here are the specs as I know them:
Series: 6200X
Speed: 3450rpm
bits per track: 72000
access time: 8.7ms
tracks: 64
unformatted capacity (MB): 0.58
Supposedly there was no scheduled preventive maintenance, however DDC
made other fixed head drives that were helium filled and they needed
periodic service.
So, my question is do I need to do anything (like purge and refill)
before I use it? Does anyone have any additional info? I did get some
manuals with it, but they're mostly focused on the controller for the
PDP-11.
Got an answer back from Jack. He left DDC 32 years ago and said he
doesn't remember much of anything about specific models. He did say the
connector pinout was almost always the same, except for specials.
He also mentioned this:
Computer Museum of America
640 C Street
San Diego, Ca 92101
Phone: (619) 619-235-8222
Supposedly they have some DDC disks and might know something about them.
Sorry it wasn't more help.
Karl
--
[email protected]
http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
