3 Jan
2014
3 Jan
'14
2:42 p.m.
On Jan 3, 2014, at 14:09 , Ethan Dicks <ethan.dicks at gmail.com> wrote:
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.
The bulkhead bracket was convenient but not essential.
To get out of the
CPU cabinet, you almost certainly have a flat 40-pin cable, then the
transition connector, then probably the usual drive-to-drive round cable,
but just laying in a line, not bolted to your rack.
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.
Anyone care to make up an engineering drawing of the
plug with tolerances
in the 0.1mm range?
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. 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 do not presently have access to a 3D printer. All of my mechanical
experience is with subtractive processes and injection molding.
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/