25 Apr
2018
25 Apr
'18
6:52 a.m.
On Tuesday, 24 April 2018 at 9:13:41 -0400, Clem Cole wrote:
On Tue, Apr 24, 2018 at 7:43 AM, Paul Winalski
<paul.winalski(a)gmail.com>
wrote:
Hmm. The earliest 3330s had 100 MB per disk, considerably more than
the 3340. I had thought that the 3340 had fewer surfaces. And the
3330s definitely only had one disk per unit, though they brought out
an 8-drive cabinet with a whopping 2.4 GB (by the time I used them).
Clem claims that the code name refers to various
advances in
disk technology first released in the 3330's disk packs. Wikipedia
and my own memory agree with you that Winchester referred to the 3340.
???Interesting ... My source was (is) my friend and former colleague from
Stellar, Russ Robelen, ???who was the HW lead for the 360/50 and the IBM ACS
systems. Russ said the original IBM project Winchester first begat the
platter (as Noel pointed out was so named because of the 30-30 capacity of
the original disk) - which showed up in the 3330 disks as well as the
sealed head stuff that Paul and Greg are talking about. What I never asked him, was where Memorex fit it. It
was a somehow
a joint project with them, and they got at least some of the
technology -- in fact DEC's OEM for the RP05/RP06 was Memorex [the
big box of logic on the side of the DEC version was the Massbus to
IBM I/O logic converter]. It is also true that real lasting piece
of project Winchester was the embedded (sealed head) stuff that came
from the 3340.
Yesterday I suggested that CDC might have used the same disk packs as
the 3330, but I'm now very sure that the ones we used came from Ampex.
I should ask Russ what he remembers, on this.
It would also be interesting to hear if he can shed any light on the
Winchester Boulevard vs. 30/30 controversy.
Greg
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