30 Nov
2002
30 Nov
'02
10:38 a.m.
Just picked up a R400X loaded with RF-72s (Thanks, Ethan!), includes a
terminator but no cable. :( I want to plug it in to my VAX 4000 200, since
that's the only VAX I have with DSSI. A DEC part number that starts with
BC21M- is what I need, if anyone has a spare they'd like to part with.
Thanks!
Bob
30 Nov
30 Nov
11:06 a.m.
--- "Robert F. Schaefer" <rschaefe(a)gcfn.org> wrote:
Just picked up a R400X loaded with RF-72s (Thanks,
Ethan!)...
You're welcome, and it's full of RF-74s. :-)
includes a terminator but no cable. :(
I was thinking of it earlier today... can you use a SCSI cable on
the blue-ribbon connectors on the board on the side, or must you
use the high-density 50 pin SCSI-2-style connectors?
Don't know much about DSSI. Know less about the cabling. Just
curious, mostly.
-ethan
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11:36 a.m.
----- Original Message -----
From: "Ethan Dicks" <erd_6502(a)yahoo.com>
To: <cctalk(a)classiccmp.org>
Sent: Saturday, November 30, 2002 7:54 PM
Subject: Re: DSSI cable needed
The vertical board to the left of the power supply is for a SCSI array.
Seems the chassis could be loaded with RF or RZ drives, choose yer poison.
Alas, I don't have a qbus SCSI controller, nor a quantity of 5.25" FH SCSI
drives to fill it with. Taking donations to fill both needs... :)
Seriously, I could use a couple of FH SCSI drives for my 4D/35.
--- "Robert F. Schaefer" <rschaefe(a)gcfn.org> wrote:
Oops-- You're right, of course. Can't wait to get 'em spinning... Can the
OpenVMS page file (or whatever it's called) span disks?
Just picked up a R400X loaded with RF-72s
(Thanks, Ethan!)...
You're welcome, and it's full of RF-74s. :-) includes a terminator but no cable. :(
I was thinking of it earlier today... can you use a SCSI cable on
the blue-ribbon connectors on the board on the side, or must you
use the high-density 50 pin SCSI-2-style connectors?
Don't know much about DSSI. Know less about the cabling. Just
curious, mostly.
I *think* I might be able to get away with two of those SCSI cables that
brings out a (HD honda-type SCSI2) connector to an ISA card backplate joined
into one, since I need two female connectors. IIRC the DSSI connector
carries out ground on every other pin, and I could make do with <18" if I
put the two boxen back to back.
-ethan
Bob
12:11 p.m.
Don't know much about DSSI. Know less about the
cabling. Just
curious, mostly.
I know of three types of DSSI connectors: 50-pin Honda, 50-pin
microribbon, and 68-pin Honda. I've only seen the 68-pin ones
on HSDxx controllers, and they've always been accompanied by a
triconnector to convert to 50-pin microribbon.
One problem with trying to use SCSI cables is the latching
mechanism is backwards.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
12:41 p.m.
----- Original Message -----
From: "Eric Dittman" <dittman(a)dittman.net>
To: <cctalk(a)classiccmp.org>
Sent: Saturday, November 30, 2002 9:12 PM
Subject: Re: DSSI cable needed
I googled onto an interesting PDF while looking for info in the R400X, it
includes (among other things) DSSI cable part numbers and an index of what
connector fits what boxen. Take a look at
http://h18000.www1.hp.com/products/quickspecs/SOC/QB00SFPF.PDF. It purports
to cover OpenVMS LAN clustering, but it's pretty broad in scope.
Don't know
much about DSSI. Know less about the cabling. Just
curious, mostly.
I know of three types of DSSI connectors: 50-pin Honda, 50-pin
microribbon, and 68-pin Honda. I've only seen the 68-pin ones
on HSDxx controllers, and they've always been accompanied by a
triconnector to convert to 50-pin microribbon.
One problem with trying to use SCSI cables is the latching
mechanism is backwards.
As long as it doesn't fall right off, it should be ok-- those BA440 chassis
aren't prone to rollong around on their own. Shoot, sometimes it takes more
than a little push to get 'em moving at all!
--
Eric Dittman
Bob
8019
days inactive
8019
days old
4 comments
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dittman＠dittman.net -
erd_6502＠yahoo.com -
rschaefe＠gcfn.org