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- Newsgroups: comp.sys.sun.hardware
- Path: sparky!uunet!cs.utexas.edu!torn!nott!cunews!bertrand.ccs.carleton.ca!wwf
- From: wwf@doe.carleton.ca (W. Walter Fergusson)
- Subject: Request: Watchdog Reset infomation wanted
- Message-ID: <WWF.93Jan21161859@sybok.doe.carleton.ca>
- Sender: news@cunews.carleton.ca (News Administrator)
- Organization: Carleton University, Electronics Department.
- Date: Thu, 21 Jan 1993 21:18:59 GMT
- Lines: 75
-
- My Sun 3/260 is suffering from watchdog reset problems. A watchdog
- reset occurs every 20-60 minutes. I would apreciate help in learning
- about watchdog resets on my machine and how to fix it.
-
- First a few questions, and then the details of my investigation so
- far.
-
- 1) What causes a watchdog reset on a Sun 3/260? My understanding is
- that it is a hardware detected inconsitency often associated with a
- timout while polling something. The only mention in the manuals is
- associated with the ie0 interface.
-
- 2) Can my battery for my real time clock be running low and causing
- the watchdog reset? The machine is 5 years old.
-
- 3) People have suggested that it might be a heat related problem. The
- board does run hot, but the two fans at the top work and I do not
- notice any thing blocking the air flow. Also the 20-60 minute period
- seems independent of how long the machine has been powered on. How
- hot can the chips get?
-
-
- Details:
-
- A few months ago I had watchdog reset problems every few days. I had
- no ethernet connection and did not do an "ifconfig ie0 down". After I
- had changed this, I had no problems with watchdog resets for 3 weeks.
- My next watchdog reset was in 3 days. Next in < 1 day. Next in 2
- hours. Now I get them 20-60 minutes appart.
-
- The watchdog reset seems to be independent of the hardware
- configuration or the software running. I get the watchdog reset with
- the full system or the full system minus one board (with correct
- jumper placement). The watchdog reset occurs when running unix or
- even at the prom monitor!
-
- When 4-6 watchdog resets have occurred, the prom monitor is stuck. It
- does not accept anything from the keyboard. The reset switch will
- cause another watchdog reset, but the keyboard is still frozen. I
- must power the machine off to talk to the prom monitor.
-
- It may be just my imagination, but the watchdog resets seem to be
- farther apart when I run the folowing shell script from a shell prompt
- in unix (multi-user or single):
- while true; do uptime ; done
-
- My machine hardware is configured as follows:
-
- Slot# board
- 1 CPU - backplane jumpers verified
- 2 empty
- 3 CG2 - backplane jumpers verified
- 4 8 Meg - backplane jumpers verified
- 5 air flow restrictor
- 6 8 Meg - resister terminated, backplane and front jumpers verified
- 7 VME SCSI - backplane jumpers verified
- 8 VME SMD - backplane jumpers verified
- 9 air flow restrictor
- 10 air flow restrictor
- 11 air flow restrictor
- 12 air flow restrictor
-
- I would appreciate any information. Please mail me. I will summarize
- to the net if requests warrent, otherwise I will mail people
- individually about my experience.
-
- Walter
- --
- --------------------+
- W. Walter Fergusson | The following quote is boring.
- wwf@doe.carleton.ca | The previous quote is not that exciting either.
- --------------------+
- Winner of the hairy chested regexp award!
-