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Message-ID: <4012D05A.3010604@utc.edu>
From: jeff-kell at utc.edu (Jeff Kell)
Subject: Re: DOS all platforms

Valdis.Kletnieks@...edu wrote:

> This story (and variants) dates back to the IBM2314 disk drive, if not further.

The 2314s were usually cabinet mounted, while the 2311 was a 
free-standing "washing machine" format.  The 2311 had a hydraulic 
actuator (really).

> I'd be more inclined to believe the 2314 variant - it was a disk drive from the
> mid 60s, 10 platters, 14" no less, a data capacity of 29 megabytes.  Oh, and it
> only did like 3600 RPM and min seek times were in the 50-75ms range (and
> full-stroke seeks took a lot longer).  As a result, you had a lot more mass in
> the arm assembly, and the full inside-to-outside cycle was down nearer to 100hz
> where it might conceivably do something useful.

Hewlett-Packard had a 7933 drive some years ago, 404Mbytes, but a large 
mech and actuator.  They were documented in *many* installations (ours 
included) to dance around a couple of feet or more.  With the standalone 
diagnostics program, you could really make it do tricks.

Jeff


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