12 Jan
2011
12 Jan
'11
7:49 p.m.
On 1/12/11 6:25 PM, Chuck Guzis wrote:
The CDC 808 recorded 6 tracks in parallel (I still
have a head from
one) on each head, with IIRC, servicing two spindles on on upper
positioner and two spindles on a lower positioner. Transfer was 12
bits in parallel.
I know that the 821 (a very rare drive; AFAIK they were specified in
some Special Systems RFPs and turned to trash as soon as the 844
drives became available) was similarly configured pretty much the
same in appearance. I don't know if any other parallel drives were
made by CDC--at least I never used any.
Cray (hey, they're at least related to CDC) made several
parallel-transfer drives; the DD-49 comes to mind in particular.
-Dave
--
Dave McGuire
Port Charlotte, FL