26 Aug
2014
26 Aug
'14
12:22 a.m.
On Tue, Aug 26, 2014 at 3:15 AM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
On Tue, Aug 26, 2014 at 2:37 AM, Pontus Pihlgren
<pontus at update.uu.se> wrote:
And then there's this...
http://www.columbia.edu/cu/computinghistory/rp06.html
http://www.columbia.edu/cu/computinghistory/rp04.html
... and this fragment...
"The RP04 and RP05's used the same pack. The RP06 was twice the density
so I'd figure the servo tracks were different. Twice as many cylinders
IIRC.
RP06 - 815 Cyl. 20 heads 19 recording surfaces.
The RP06 is equivalent to the IBM 3330 Mod II.
RP04/RP05 - 411 Cyl 20 heads 19 recording surfaces..
The RP04 or RP05 is equivalent to the IBM 3330 Mod I.
RP05 is a half-density RP06 made by Memorex. The RP04 was an ISS/Sperry
drive. The RP05 was originally designated RP04-II before production and
marketing."
So the RP04-RP05-RP06 are one drive series, and the RP02-RP03 are another.
-ethan
But I'm curious whether later RP drives are
backwards compatible, could
an RP06 be used?
I wouldn't think so...
Also, was the RP-drives DEC designs or rebadged
drives from someone else?
ISTR the RP02/RP03 were a Memorex drive, and probably the RP04 and
RP06 but I'm not as sure...