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.
I know someone who worked for them during that era as a checkout tech. I
sent him an email and will let you know.
Karl
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