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- From: oneill@cs.ulowell.edu (Brian 'Doc' O'Neill)
- Newsgroups: comp.sys.sun.hardware
- Subject: Memory problem with Sun 4/280
- Message-ID: <C0JLFL.1Gn@ulowell.ulowell.edu>
- Date: 8 Jan 93 15:52:32 GMT
- Sender: usenet@ulowell.ulowell.edu (News manager - ulowell)
- Organization: University of Massachusetts at Lowell Computer Science
- Lines: 27
-
- I have a Sun 4/280S running SunOS 4.1.1. Some months back, shortly after a
- budget cut killed our service contract, It appeared to be having some memory
- problems. We had 3 32Mb boards in slots 6, 3, and 4. Pulling the boards out
- of 3 and 4 seemed to solve the problem. If either or both were put in,
- various programs would fail with bus errors or segmentation faults, and
- eventually the system would crash. Without them, it ran fine.
-
- I managed to get two new boards, and placed them in yesterday. A short time
- later, things started dying again with the same symptoms, and the system
- crashed. Running memory tests in diagnotic mode resulted in no errors, but
- the system would not boot completely with either board present. Removing the
- boards resulted in a clean boot.
-
- I have checked most of the possibilities. The terminating resistor network
- is only present on board 0, which is in slot 6. Board 1 is in slot 3 and
- board 2 is in slot 4. The bottom two jumpers on 3,4, and 6 are all in place.
- A check of the Cardcage Slot Assignments manual agrees with the jumper
- settings, but one diagram said that board 1 should be in slot 2, and board 2
- in slot 3, which is impossible, since the CPU takes slots 1 and 2. A
- paragraph later indicates 3 and 4 are correct.
-
- Can anyone else give me any ideas???
-
- =======================================================================
- Brian O'Neill - Systems Manager, Computer Science (508) 934-3645
- University of Massachusetts at Lowell
- Internet: oneill@ulowell.edu Moderator, comp.binaries.ibm.pc
-