8 Jul
2005
8 Jul
'05
10:10 p.m.
Ethan wrote....
I understand wanting to keep to a single rack, but to
be honest, back
in the day, a single-rack 11/34 was pretty common, but the larger
machines tended to have multiple racks, a BA-11 in addition to the
CPU, etc. A BA-11K holds up to 3 DD11DK backplanes, *lots* of space.
You can also mount RK11D backplanes in there, or an RK611 for
RK06/RK07... all commonly done on machines in the 1970s and 1980s.
I only have one
RK05, and it's destined for my PDP-8E, and I'm unlikely to
ever find more. Many list members have scads of them, but to me RK05's are
pretty much unobtanium in my area.
In terms of disk, RT11 can live just fine on floppies,
but a disk is
nice, even an RL01 or RL02 (5MB or 10MB). Older versions of RSTS are
OK on an RL02 or two; newer ones (v9, v10) may not fit on a system
with a single RL02. 2.9BSD doesn't really fit in 10MB - you can load
it, but there's no room for kernel sources. Not sure about disk
requirements for v6, v7, etc., but 10MB might be OK.
I'll go with either an
RL02 or RA81.
With leaving the top of the rack empty for cooling
(probably not a bad
idea in a non-machine-room environment), your options are severely
limited. If it were my system, I don't think I'd even consider trying
to fit in a single rack, but I have a) empty H960 racks and b) space
to set them up.
I have two other H960 racks, guess I'll have to add one to the
/45 and make
it a dual bay system. The other H960 will probably go to the 11/34
restoration.
Thanks for the input!
Jay West