From owner-freebsd-hardware Tue May 21 15:10:04 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id PAA03501 for hardware-outgoing; Tue, 21 May 1996 15:10:04 -0700 (PDT) Received: from databus.databus.com (databus.databus.com [198.186.154.34]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id PAA03471 for ; Tue, 21 May 1996 15:10:00 -0700 (PDT) From: Barney Wolff To: hardware@freebsd.org Date: Tue, 21 May 1996 17:59 EDT Subject: Re: Triton chipset with 256k cache caches 32M only? Content-Type: text/plain Message-ID: <31a23f350.da6@databus.databus.com> Sender: owner-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk The figure of "once in 10 years" was given without any indication of what it applies to. 0.1/year/bit? per MB? per SIMM? per 64MB? I am familiar with a network of 100 64MB machines, and it sees at least a few corrected ECC errors a week, so I suspect the raw error rate is much more like 1 a year, if not higher, not 1 a decade. For almost any purpose, a crash a year is acceptable, if recovery is reasonable. Data corruption is not acceptable. My net of all this is that I'll run with parity if it's faster than ECC, but not run with nothing at all. Barney Wolff