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- Path: sparky!uunet!wupost!usc!news!nic.cerf.net!davsmith
- From: davsmith@nic.cerf.net (David Smith)
- Newsgroups: comp.arch
- Subject: Re: Error Correcting Memory
- Message-ID: <2725@news.cerf.net>
- Date: 3 Sep 92 23:09:56 GMT
- References: <Sep03.210730.68303@yuma.ACNS.ColoState.EDU>
- Sender: news@news.cerf.net
- Organization: CERFnet
- Lines: 22
- Nntp-Posting-Host: nic.cerf.net
-
- In article <Sep03.210730.68303@yuma.ACNS.ColoState.EDU> shafer@CS.ColoState.EDU (spencer shafer) writes:
- >I'm interested in learning about the difference in reliability
- >between parity memory and error checking-correction memory. Can
- >anyone provide me with some pointers to related books/articles?
- >Or does anyone know straight off what the relative difference is?
-
- Parity memory says, "Dude, you're bummed. You've got a hosed bit."
-
- ECC memory says "Dude, check it out! You had a single bit error and I, like,
- fixed it!" or "Dude, you're bummed, two or more of your bits were
- bad."
-
- Parity will generally only be guaranteed to catch single bit errors, while
- ECC will correct single bit errors and catch double bit errors (in general,
- someone may have implemented an ECC that does more)
-
- From the land of Sun and Cerf,
- David L. Smith
- smithd@discos.com or davsmith@nic.cerf.net
- --
- David L. Smith
- smithd@discos.com or davsmith@nic.cerf.net
-