Memory problem with SUN 4/330

[Kai Huebener]

One of our SUN4/330s is behaving strangely since two weeks: Every now and
then we will get a message like

vmunix: Parity Error: Physical Address ....
vmunix: Memory Error in SIMM U801 on First 3U Memory Card:
vmunix: panic: synchronous parity error - kernel

and so on.

The system will then either reboot or fall into the watchdog reset.

SUN has already changed the memory board (twice) and the CPU board, but
has not yet fixed the problem. When we try to run the system with only 8
MB main memory then everything is fine. But as soon as we add the 3U
memory card, the system crashes (we tried it with three different cards).

We also upgraded from SunOS 4.0.3 to 4.1 but that didn't change anything.

Has anyone experienced similar problems ... and has anyone solved them?

Thanks in advance for any hints..

Gtgs, Kai.

PS: Please email to huebener at fbihh.informatik.uni-hamburg.dbp.de

Kai Huebener
Computer Science Dept.
Univ. of Hamburg