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Date:      Fri, 28 Jan 2000 07:30:53 -0800
From:      "Kevin Oberman" <oberman@es.net>
To:        R Joseph Wright <rjoseph@nwlink.com>
Cc:        questions@freebsd.org
Subject:   Re: Why Doesn't XFree86 Upgrade Properly 
Message-ID:  <200001281530.HAA01991@ptavv.es.net>
In-Reply-To: Your message of "Thu, 27 Jan 2000 22:04:12 PST." <3891315C.9BD4FB66@nwlink.com> 

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As I mentioned in my last message, my problem with bad RAM was on my
brand new system.

Memory (and, to a lesser extent, other solid-state components) will
typically fail in the first 90 days or after several years. This is
probably more true of memory than most chips because of the very dense
nature of the chips. (I don't think I want to get into an explanation
of atomic migration and the like. I really don't fully understand it
myself and I'd just be parroting a friend who is a solid-state
physicist.)

In any case, memory that lasts for 6 months is probably good for
years. This is why many Mil-specs and NASA specs require extended
burn-in periods for all solid-state components.

If you have two DIMMs, pull one. FreeBSD can get by with 16 or 32 MB
with no problems (although some operation may slow down). If it still
crashes, put that one back and pull the other. !!!Follow proper
anti-static procedures!!!

R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634


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