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w20-575-121 (O2): bad instruction cache

daemon@ATHENA.MIT.EDU (Matthew Belmonte)
Thu Sep 23 01:35:17 1999

Date: Thu, 23 Sep 1999 01:30:54 -0400 (EDT)
Message-Id: <199909230530.BAA00558@mattababy.mit.edu>
From: belmonte@MIT.EDU (Matthew Belmonte)
To: hotline@MIT.EDU

w20-575-121, an SGI O2, appears to have a faulty instruction cache.  It
repeatedly generates kernel seg-faults while attempting to boot (Bad addr: 0x0,
cause: 0x8<CE=73  PC: 0x803c2ee4 ep: 0xffffc9c8).  PROM diagnostics fail in the
ICache 2 test; all other tests are passed.

You may note that early in the boot process IRIX 6.5 on this platform
complains "PCI <> Error (no PCI address logged)"; this is not part of the
problem.  It is, rather, a manifestation of IRIX bug number 643802.  The
message is innocuous.


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