Date: Tue, 24 Aug 2010 12:51:15 -0700 From: Artem Belevich <fbsdlist@src.cx> To: Andriy Gapon <avg@icyb.net.ua> Cc: Ronald Klop <ronald-freebsd8@thuis.klop.ws>, freebsd-stable@freebsd.org Subject: Re: kernel MCA messages Message-ID: <AANLkTik8AcWPw_Vc5Jjn97AoXyp5=w0SNmJXCVXAJCHn@mail.gmail.com> In-Reply-To: <4C737F85.5010804@icyb.net.ua> References: <4C71CC62.6060803@langille.org> <4C71D756.5080205@langille.org> <4C7218D6.6090408@icyb.net.ua> <201008230820.35260.jhb@freebsd.org> <op.vhxiafp38527sy@212-123-145-58.ip.telfort.nl> <4C737F85.5010804@icyb.net.ua>
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IMHO the key here is whether hardware is broken or not. The only case where correctable ECC errors are OK is when a bit gets flipped by a high-energy particle. That's a normal but fairly rare event. If you get bit flips often enough that you can recall details of more then one of them on the same hardware, my guess would be that you're dealing with something else -- bad/marginal memory, signal integrity issues, power issues, overheating... The list continues.. In all those cases hardware does *not* work correctly. Whether you can (or want to) keep running stuff on the hardware that is broken is another question. --Artem On Tue, Aug 24, 2010 at 1:15 AM, Andriy Gapon <avg@icyb.net.ua> wrote: > on 24/08/2010 09:14 Ronald Klop said the following: >> >> A little off topic, but what is 'a low rate of corrected ECC errors'? At= work >> one machine has them like ones per day, but runs ok. Is ones per day muc= h? > > That's up to your judgment. =A0It's like after how many remapped sectors = do you > replace HDD. > You may find this interesting: > http://www.cs.toronto.edu/~bianca/papers/sigmetrics09.pdf > > -- > Andriy Gapon > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >
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