Masscomp 5500 ethernet hardware failure?

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2 total messages Started by Dr. Craig Allen Counterman Thu, 13 Aug 1992 21:37

#17

Author: Dr. Craig Allen Counterman
Date: Thu, 13 Aug 1992 21:37

41 lines
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I have an old, long out of contract, 5500.  It crashed and when it
rebooted it was off the net.  Examination and supervised rebooting
showed that there was a problem with the ethernet.  Powercycling,
reseating the board, general laying on of hands didn't help.  The
error messages (this is unix version 4.0A)

Ethernet 0 at FF0170
Ethernet 0 reset failed

later:
EXOS 0 sext msg with bad kludge pointer
Loading network TCP/IP software
Ethernet 0 reset failed

EXIOCRESET: Network is down
Network download failed


The board is an EXCELAN EXOS 301
7220001700 Rev B
1289

P/N: 9900020-04		REV: C
DC: 8905		ECN: 2063


On powerup, the indicator lamps have sometimes all been off from the
start, but usually lamp #1 is on steadily (which indicates hardware
failure) and sometimes lamp #3 is on steadily as well.

So: any hints?  Is this a recognizable component failure?  Is it
certain to be the ethernet board or is it possible that another board
is interfering with it (the FPU has on occasion failed diagnostics)?

Thanks,
Craig



--
"Dr. Craig Allen Counterman, Ph.D."

Re: Masscomp 5500 ethernet hardware failure?

#19

Author: Harald Barth
Date: Thu, 20 Aug 1992 10:10

30 lines
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We at the "Stacken" - that's the computer club here, have an old 
masscomp running RTU 4.0A, too. As everything else, it's long out 
of contract. It's a 5600 with 1 CPU, 8 ttys and sadly no ethernet 
at all. So if someone has a surplus supply of EXOS boards - drop 
me a mail, too :-)

Our 5600 has only been up a month, after a long time of "hardware 
failure". It just indicated "cache memory write error" at boot up.
Finally after deciding that powercycling didn't help, I decided 
that it couldn't get worse and pulled the CPU-board out. Then I 
firmly pushed in each chip in its socket. After that "exercise" 
the machine booted without problems. You may "exercise" your EXOS
in the same way. (Heat movement makes chips creep up and out of 
their sockets.)

Because of its commercial past our masscomp had just the bare 
RTU 4.0A - in the last weeks I installed emacs, bash, gnutar
and I'm still struggling with tcsh (The SIGCHLD semantics seem
to be somewhere between SYSV.III and BSD4.1).

In the next months I hope to get it up on the net. Can be slip,
can be an old 3Com bord (from a SUN2). What are my odds :-?

Good luck with your 5500, I hope to introduce our 5600 as 
maggot.stacken.kth.se to the net soon.

Harald.
haba@stacken.kth.se	(Club account)
d88-hba@nada.kth.se	(Student account)

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