Date: Sat, 25 Oct 1997 17:06:03 -0400 From: Jerry Hicks <wghhicks@ix.netcom.com> To: freebsd-hackers@FreeBSD.ORG Subject: Re: Parity Ram Message-ID: <34525F3B.1137B612@ix.netcom.com> References: <Pine.BSF.3.96.971025115335.173A-100000@trojanhorse.ml.org> <34524948.41C67EA6@est.is>
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Žoršur Ivarsson wrote: > > This has helped me several times when I was suspecting broken memory in > the old days (90-93) :-) > > Thordur Ivarsson ECC Memory was marginally useful for this years ago when were using NMOS RAM. Lately, most memory failures I've seen are catastrophic, taking out a whole device or better. I'm not a hardware specialist; Does 'Parity RAM' employ a conventional parity scheme, a la asynch serial communications? Didn't Richard Hamming show these to -cause- more problems than they solve? It seems I recall a number like 256K (bits/bytes/words?) as being the threshold in a proof he presented. Jerry Hicks jerry_hicks@bigfoot.com
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