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Date:      Tue,  5 Dec 2000 15:34:44 -0500 (EST)
From:      Andrew Gallatin <gallatin@cs.duke.edu>
To:        Wilko Bulte <wkb@freebie.demon.nl>
Cc:        freebsd-alpha@freebsd.org
Subject:   Re: part numbers for 2100 5/300 processor modules?
Message-ID:  <14893.20355.234641.954094@grasshopper.cs.duke.edu>
In-Reply-To: <20001205210513.M346@freebie.demon.nl>
References:  <20001204155447.E1431@layer8.net> <14892.14352.956036.813077@grasshopper.cs.duke.edu> <20001205205555.H346@freebie.demon.nl> <14893.18646.222048.868530@grasshopper.cs.duke.edu> <20001205210513.M346@freebie.demon.nl>

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Wilko Bulte writes:
 > 
 > Tomorrow we will know more. Today I first had to remove the broken
 > 512Mb memory module from the Lynx. FreeBSD does not tolerate memory errors,
 > the ECC needs CPU help and that is not given. Instead a panic is done ;-)

Ecc errors are tolerated:

	Jul 11 13:50:00 hurricane /kernel: Warning: received processor correctable error.

This is an AS600 5/266.  I'm pretty sure its an ecc error because it
complained of them fairly bitterly back when it was running Tru64.

I think the problem is that memory which is totally broken and
generates a machine-check when accessed is not tolerated by FreeBSD,
but is tolerated by Tru64.  Somebody once told me that Tru64 probes
all the memory and is smart enough to not use bad memory, that's
probably how it survives on your machine..

Drew





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