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Article #913Re: Justification for the use of 9-bit wide RAM modules
From: John DiMarco
Date: Fri, 14 Jul 1995 00:00
Date: Fri, 14 Jul 1995 00:00
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1891 bytes
mark@taylor.infi.net (Mark Davis) writes: >Parity RAM is next to useless. It is really a waste of valuable bits. >The only logical approach is to use no parity, or use ECC RAM. >Parity memory can't even detect but SOME memory errors, and can't do >ANYTHING about it, except warn (or as pointed out, just go ahead and >crash the system anyway). I disagree. Without parity, single-bit errors will silently corrupt data. This can be very problematic. A system panic is often preferable. Of course, ECC memory provides significantly more protection than parity, but the extra two bits per byte makes it more costly. Parity is a reasonable compromise for desktop workstations. Regards, John -- John DiMarco <jdd@cdf.toronto.edu> Office: EA201B Computing Disciplines Facility Systems Manager Phone: 416-978-1928 University of Toronto Fax: 416-978-1931 http://www.cdf.toronto.edu/personal/jdd/jdd.html
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f4671,4711ba0969b34d53 X-Google-Attributes: gidf4671,public X-Google-Thread: f88e1,4711ba0969b34d53 X-Google-Attributes: gidf88e1,public X-Google-Thread: 1070f0,4711ba0969b34d53 X-Google-Attributes: gid1070f0,public X-Google-Thread: 10d053,4711ba0969b34d53 X-Google-Attributes: gid10d053,public From: jdd@cdf.toronto.edu (John DiMarco) Subject: Re: Justification for the use of 9-bit wide RAM modules Date: 1995/07/14 Message-ID: <jdd.805748096@cdf.toronto.edu> X-Deja-AN: 106176959 distribution: inet sender: news@cdf.toronto.edu (Usenet News) references: <3tqpb5$dl8@orb.apana.org.au> <3u2981$9i9@melang.connect.com.au> <1995Jul14.030358.28194@taylor.infi.net> organization: University of Toronto Computing Disciplines Facility newsgroups: alt.sys.sun,aus.computers.sun,comp.sys.sun.admin,comp.sys.sun.hardware