RE: Linux & ECC memory

Ray Van Tassle-CRV004 (
Fri, 15 Nov 1996 8:24:40 -0600

The Triton HX chipset supports ECC, if you have 9-bit SIMMs. 9-bit EDO
SIMMs exist, but are rare. 9-bit non-edo (FPM) ("true parity") SIMMs are
common. Somebody (finally! ) realized that a 72-bit wide word (64+8) has
enough bits to easily implement ECC. ECC is *much* better than parity.
There is a performance hit, though; Read burst timing for non-ECC can be
x-2-2-2, but with ECC it must be x-3-3-3.
Intel has a document ("ECC Overview") on their WEB site. Evidently, the
PPro itself supports ECC.
Dunno about Linux support. Probably not yet. If I had 9-bit SIMMs, I would
start working on it myself.
-30- Ray
From: on Thu, Nov 14, 1996 5:21 PM
Subject: z-Linux & ECC memory

I just recently saw an advertisement for a Dell computer with a P6
motherboard & CPU that includes "64MB EDO RAM with ECC".

Are there in fact x86 motherboards that support ECC RAM? Can such a
motherboard provide better error recognition & recovery then a simple
"parity error"?

Most importantly, can (does) Linux take advantage of this?

Kenneth Albanowski (, CIS: 70705,126)