3 Jan
2014
3 Jan
'14
6:50 p.m.
On Fri, Jan 3, 2014 at 5:42 PM, Mark J. Blair <nf6x at nf6x.net> wrote:
On Jan 3, 2014, at 14:09 , Ethan Dicks <ethan.dicks
at gmail.com> wrote:
You don't need -EF packs, but you do need zero bad blocks. Check your
-DC packs for errors. If they have any, use them for RT-11.
DEC merely tested and sold -EF packs that were certified to have zero
bad blocks at the time of sale.
That reminds me - you have to have error-free
packs. DEC used
to sell RL02-EF packs for use with UNIX (RT-11 can mark bad spots
on the disk and if they aren't in the first tracks or if there aren't too many,
you can mark those sectors allocated and work around them. Not so with
BSD).
I guess I'm not running BSD on it any time soon, then. None of my packs are the -EF
ones. I don't recall seeing a separate ribbon cable
between the RL11 and the round cable. I'll need to take a closer look when I get back
home.
I'm not saying you _can't_ fit a round RL cable down through the sides
of an 11/44, but my recollection is the cable ways are kinda tight and
only suitable for a few ribbon cables to make their way out (but I
might be remembering the 11/24 if they are mechanically different).
I might make a solid model of the plugs sometime. I
don't know what the tabs
look like on the 1 and 2 plugs, though.
I would recommend starting with _any_ plug and printing one. to see
how well it works.
It might be easiest to just make one
model of the plug with all of the tabs present, then cutting away some of them
with an razor blade to get the desired ID.
I would not recommend that. Fused filament parts are not as
structurally sound as injection molded parts. You can do some light
sanding and surface work, but major work that cuts through the
"shells" produces weak parts and exposes fill layers. Imagine cutting
a round hole in a chain-link fence and how that affects the integrity
of that panel of the fence.
I do not presently have access to a 3D printer. All of
my mechanical
experience is with subtractive processes and injection molding.
I run 3D printing activites at our local hackerspace (including
monthly meetups) but I am not a 3D designer. I work on the printer
end, not the drawing end.
-ethan