15 Oct
2015
15 Oct
'15
2:27 p.m.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of tony duell
Sent: Thursday, October 15, 2015 11:00 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RE: 8-sector decpacks?
Half density? I vaguely remember an RK05 style drive at half the density. RK02? Or am
I mixing it up with RP02 vs. > RP03?
No, you're right. The RK02 is the low-density drive (actually a Diablo model 30), the
RK03 being the high density model. The RK05 has the same
bit density (heck the same format) as the RK03.
There was an RK01 I beleive. I forget who made that (it wasn't DEC, if you see what I
mean), but I could believe thst was low density too.
-tony
That seems probable; the major reference I found was this:
http://www.ultimate.com/phil/pdp10/dec.disks
Which suggests that the RK02 is 12 or 16-sector; but it could be in error. (I've
verified via DEC peripheral handbooks that, at least on the -11, the RK02 used 12-sector
packs. I haven't yet found a handbook for the 8/I that covers the RK02 -- the one I
have on my desk here is from 1972 and only talks about the RK01, so I guess it's a bit
too early. Given the short life of the RK02, it may be tough to find the right one :).
(The RK01 is 16-sector on the 8/I, FWIW.)
- Josh