Date: Sat, 23 Sep 2000 12:09:17 +0200 From: Brad Knowles <blk@skynet.be> To: Kai Voigt <k@123.org> Cc: Kris Kennaway <kris@FreeBSD.ORG>, freebsd-stable@FreeBSD.ORG Subject: Re: 4.1-STABLE, make world problems, funny case Message-ID: <v0422080bb5f230dfb505@[10.0.1.2]> In-Reply-To: <20000923112552.D39467@abc.123.org> References: <20000923082602.A39467@abc.123.org> <Pine.BSF.4.21.0009230130570.63170-100000@freefall.freebsd.org> <20000923112305.C39467@abc.123.org> <20000923112552.D39467@abc.123.org>
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At 11:25 AM +0200 2000/9/23, Kai Voigt wrote: > I just found /usr/ports/sysutils/memtest/ and hope to find that bit. Sadly, most memory testing utilities don't find problems like this. It seems to be a conjunction of lots of I/O and heavy stress placed on memory that trips things like this up -- precisely the sort of thing you get during a "make world", but precisely the sort of thing that you don't find with a memory tester. I believe that the regular suggestion is to try a "make world" with half of your regular memory installed. If that works (repeatedly), then try it with the other half. If one fails and the other succeeds, then you've narrowed down which half the bad memory is in. You swap out half of the suspect memory with the good memory, and you try again. If the test succeeds, then you know the part you swapped out contains the bad memory. Repeat this process until you've found the SIMMs or DIMMs that repeatedly cause failure, while removing them allows things to work normally. Note that ECC RAM usually helps in this case, but it is possible for there to be so many errors that even ECC can't save you. -- These are my opinions -- not to be taken as official Skynet policy ====================================================================== Brad Knowles, <blk@skynet.be> || Belgacom Skynet SA/NV Systems Architect, Mail/News/FTP/Proxy Admin || Rue Colonel Bourg, 124 Phone/Fax: +32-2-706.13.11/12.49 || B-1140 Brussels http://www.skynet.be || Belgium "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -Benjamin Franklin, Historical Review of Pennsylvania. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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