1 Nov
2005
1 Nov
'05
6:24 a.m.
Folks,
I may be installing a 6640, 6660, star coupler and HSJ40s next week with
'a shedload of disks'. The size of the shed hasn't been quantified :)
Can anyone remember the rules for star couplers before I go reading all
the docs? I haven't done anything with these for nigh on 10 years and can
only remember basics like CI cable positioning and macro bends etc.....
I know I've got a 6660 at work here for a memory refresher but no SC.
TIA!
--
adrian/witchy
Binary Dinosaurs creator/curator
www.binarydinosaurs.co.uk - the UKs biggest home computer collection?
1 Nov
1 Nov
6:31 a.m.
On Tue, 2005-11-01 11:24:45 -0000, Witchy <witchy at binarydinosaurs.co.uk> wrote:
I know I've got a 6660 at work here for a memory
refresher but no SC.
Awesome...
MfG, JBG
--
Jan-Benedict Glaw jbglaw at lug-owl.de . +49-172-7608481 _ O _
"Eine Freie Meinung in einem Freien Kopf | Gegen Zensur | Gegen Krieg _ _ O
f?r einen Freien Staat voll Freier B?rger" | im Internet! | im Irak! O O O
ret = do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM | TCPA));
7:18 a.m.
On 01/11/2005, at 10:24 PM, Witchy wrote:
Folks,
I may be installing a 6640, 6660, star coupler and HSJ40s next week
with
'a shedload of disks'. The size of the shed hasn't been quantified :)
Can anyone remember the rules for star couplers before I go reading
all
the docs? I haven't done anything with these for nigh on 10 years
and can
only remember basics like CI cable positioning and macro bends
etc.....
Well there's not really much more to it than that. If you're lucky
you have the newer CI cables which are thinner and much lighter than
the originals. Given that you've only got three nodes, just run the
two sets (A and B) of the CI cables (transmit and receive for a total
of four) to the correct ports in the star coupler - they will be
labeled.
There are some configuration jumpers on the CI boards but they are
likely to be in the default settings. ISTR that they could be set to
use both paths simultaneously to get twice the throughput but as the
CI based cluster I used to manage had HSC-50s and older VAXen, I
couldn't take advantage of this. I'm not sure if the HSJ40 can - over
to someone else perhaps for a definitive answer....
Remember, star couplers don't require power and were probably the
most reliable device Digital ever produced!
Huw Davies | e-mail: Huw.Davies at kerberos.davies.net.au
Melbourne | "If soccer was meant to be played in the
Australia | air, the sky would be painted green"
3:58 p.m.
New subject: DEC HZ54 service manual
Folks,
I'm struggling with getting an HZ54 and HZ53 running again after many years
in storage. The user guide is on Paul Williams' excellent repository but
aside from explaining the startup it doesn't go into any more detail.
The HZ54 contains 2x200mb memory boards and an RZ25 (~500mb) and faults
shortly after the disk spins up, this I guess is normally the point it would
populate the memory boards with the disk contents. At this point I'd suspect
the disk but the HZ53 does exactly the same thing.
If I just plug the RZ25 into a VAX it works fine.
Anyone have a service manual or know how these units work?
Cheers!
--
Adrian/Witchy
Www.binarydinosaurs.co.uk - must set up a sig again :)
4:22 p.m.
New subject: DEC HZ54 service manual
Adrian Graham wrote:
The HZ54 contains 2x200mb memory boards and an RZ25
(~500mb) and
faults shortly after the disk spins up, this I guess is normally the
point it would populate the memory boards with the disk contents. At
this point I'd suspect the disk but the HZ53 does exactly the same
thing.
If I just plug the RZ25 into a VAX it works fine.
Anyone have a service manual or know how these units work?
No idea about a service manual. Some of these units (like
the HSJs) have a battery somewhere that goes flat. Once
it's gone flat, reviving the unit is "interesting". All
this is from half-remembered usenet posts rather than
any semblance of direct experience, so take with a
pinch of salt.
No idea about a service manual - don't recall seeing
one ever. Sorry.
Antonio
--
Antonio carlini
arcarlini at iee.org
5:05 p.m.
New subject: DEC HZ54 service manual
On 1/11/05 21:22, "a.carlini at ntlworld.com" <arcarlini at iee.org>
wrote:
No idea about a service manual. Some of these units
(like
the HSJs) have a battery somewhere that goes flat. Once
it's gone flat, reviving the unit is "interesting". All
this is from half-remembered usenet posts rather than
any semblance of direct experience, so take with a
pinch of salt.
Interesting you should say that - both of these had dead leaked batteries so
I rebuilt one battery pack using new nicads but left the other one alone;
I'd already decided that if the batteries were toast the drive wouldn't be
happy.
Pity about the service manual, I want to know why the internal drive is set
to ID 6 and what the termination etc should be set to.
Cheers
A
6838
days inactive
6838
days old
5 comments
4 participants
participants (4)
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arcarlini＠iee.org -
huw.davies＠kerberos.davies.net.au -
jbglaw＠lug-owl.de -
witchy＠binarydinosaurs.co.uk