working magnetic drum stores?

From: Vintage Computer Festival <vcf_at_siconic.com>
Date: Wed Mar 31 02:45:12 2004

On Wed, 31 Mar 2004, Ethan Dicks wrote:

> On Tue, Mar 30, 2004 at 01:00:21PM -0800, Tom Jennings wrote:
> > LGP-21 fixed-head-platter mechanical memory (main store,
> > not "disk") the heads sit crashed (sic) and lift when up to
> > speed. The platter surface has fine scoring -- it's normal. It's
> > only 80 bits per inch. Nickel plated steel. In fact, there's
> > little springs that press the heads DOWNWARD.
>
> Sounds a bit like the DEC DF-32 - 1/4" steel platters plated with something
> (nickel?) The drive motor has a seperate power switch from the electronics,

The Librascope L321 fixed-head drive I've got is coated with cobalt
according to the literature.

-- 
Sellam Ismail                                        Vintage Computer Festival
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Received on Wed Mar 31 2004 - 02:45:12 BST

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