30 Mar
2004
30 Mar
'04
3 p.m.
On Fri, 26 Mar 2004, Peter C. Wallace wrote:
Actually some drums have flying heads, Bryant at one
time had drums with
flying heads and a slightly conical drum, so that the drum could be lifted to
approach the heads when the drum was up to "flying" speed...
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.