5 May
1999
5 May
'99
5:17 p.m.
one has a board pair M7164/M7165 connected by short
cables
across the top.
M7164/M7165 is the KDA50 SDI controller, not SCSI. So here are some "skunk box" questions:
What type of backplane is this? Looks almost like it is Q/CD all the way
across.
Yep, you got it!
There is an ethernet interface in one called a DESQA
any good? Seems like a
follow on to the DEQNA as it has both 10B2 and AUI ports on it. The other
two chassis both had DELQA's in them.
The DESQA is skunk box version of the DELQA.
so that answers that question, and by careful
disassembly I can see that
the connectors are correct in terms of how I plugged them, so the only
question is if the fault was a board short or if the power connector is
non-standard. Anyone?
It's a perfectly standard connector. The components near the connector
are, in this case, probably nothing fancier than some electrolytics
for bypassing. Is this reasonable? My TK70's are currently in running
systems, and my customers would get angry if I started pulling them
apart this time of night :-)
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
5 May
5 May
6:25 p.m.
At 10:17 PM 5/5/99 -0400, CLASSICCMP(a)trailing-edge.com wrote:
It runs RA70's, RA80's, and RA90's. 4 at a
time.
Ah, that explains it, there were a couple of racks of RA81s in this auction
as well so I suspect each one of these vaxen originally matched up with one
of those racks. Seems incredible to run a disk on what essentially looks
like 10BT connector, since there are 4 2901's on the controller its
probably a predecessor to firewire or something like it!
Yep, you got it! [Q/CD all across]
Cool, also the wide spacing to allow the metal covers fooled me for a
minute, there is only 11 slots in these puppies.
The DESQA is skunk box version of the DELQA.
Ok, that works.
It's a perfectly standard connector. The
components near the connector
are, in this case, probably nothing fancier than some electrolytics
for bypassing. Is this reasonable? My TK70's are currently in running
systems, and my customers would get angry if I started pulling them
apart this time of night :-)
No problem-o, please _don't_ disconnect them :-) I'm the short theory on
the skid is no the only remaining candidate. One of the boxes has the TK70
with skid plate, which is cool but its also the drive in the nicest shape
(it still has its door flap which seems to be pretty rare.) Perhaps its
newer than the other ones.
I put everything together in the BA213 labelled "chewy" and fired it up,
and according to the LED display it booted! Unfortunately I don't have a
connector that would hook up into the console port thingy to see _what_ it
booted. The RF71's sure make a weird power up sequence, kind of a reggae
beat, but they eventually settle down with their little ready lights on.
Tomorrow I'm going to steal a CNF with the 9 pin connector to see what the
console is saying.
Since I'm missing the front cover for this thing does anyone have a pointer
to a picture of what it would look like? How about a spare BA213 cover?
--Chuck
7:40 p.m.
Yep, you got
it! [Q/CD all across]
Cool, also the wide spacing to allow the metal covers fooled me for a
minute, there is only 11 slots in these puppies. 
8:21 p.m.
Let me see if I've a few facts straight here. This
is a BA213 you're
talking about, and this is the same backplane as would be in a DECserver
550. Now for the really STUPID question, Q/CD means that all slots are
full height, like the first 3 or 4 on a BA123.
Yes, exactly... quad-high slots, Q22/CD all the way across.
Megan Gentry
Former RT-11 Developer
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