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Date:      Sat, 25 Oct 1997 22:28:01 +0200
From:      sthaug@nethelp.no
To:        jamil@trojanhorse.ml.org
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: Parity Ram
Message-ID:  <23832.877811281@verdi.nethelp.no>
In-Reply-To: Your message of "Sat, 25 Oct 1997 11:55:34 -0700 (PDT)"
References:  <Pine.BSF.3.96.971025115335.173A-100000@trojanhorse.ml.org>

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> Can someone fill me in on when you would want to use parity ram as opposed
> to non-parity ram these days?

To avoid silently corrupting your data?

> If there was some anomaly in memory how
> would freebsd handle it (is there a trap for parity error?)

If you have a decent chipset (eg. 430HX, 440FX) parity memory can actually
give you single bit error correction, and double bit error detection. This
is actually quite a bit better than straight parity.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no



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