24 Nov
2008
24 Nov
'08
2:15 p.m.
anyway you look at it, the material has to be deposited onto a flat surface, no?
--- On Sun, 11/23/08, Eric Smith <eric at brouhaha.com> wrote:
From: Eric Smith <eric at brouhaha.com>
Subject: Re: Hard disk material
To: "On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Date: Sunday, November 23, 2008, 10:49 PM
Brent Hilpert wrote:
Weren't drums and early disks done with
nickel or
some-such plating, rather
than binder & oxide?
Nickel plating would definitely not work. Some of the
earliest drums used cunife (copper/nickel/iron alloy) wire
tightly wound around an aluminum cylinder, then turned on a
lathe to get a flat surface. Some drums included magnesium,
cobalt, or other metals in the alloy. Later drums used
various coating methods rather than wire.