Date: Thu, 31 Mar 2005 10:53:04 -0800 From: "David O'Brien" <obrien@freebsd.org> To: freebsd-amd64@freebsd.org Subject: Re: [OT] memtest86 (Was: Problems with AMD64 and 8 GB RAM?) Message-ID: <20050331185304.GD1687@dragon.NUXI.org> In-Reply-To: <20050331061527.GF701@afflictions.org> References: <20050330222439.GU84137@wantadilla.lemis.com> <20050330224445.GW84137@wantadilla.lemis.com> <1616-SnapperMsg8FB730CABE70E540@[10.178.116.227]> <200503301527.28612.peter@wemm.org> <20050330234603.GA18631@ack.Berkeley.EDU> <20050331061527.GF701@afflictions.org>
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On Thu, Mar 31, 2005 at 01:15:28AM -0500, Damian Gerow wrote: > Thus spake Mike Hunter (mhunter@ack.Berkeley.EDU) [30/03/05 18:46]: > : This reminds me, I noticed that gentoo includes a memtest86 "kernel" in > : their install ISO. Would this be a hard feature to include in FreeBSD? > > In the case of AMD64, it'd be almost pointless. I've not yet been able to > run a copy of memtest86 on my machine (though it could have been due to > memory problems at the time). > > memtest86+ (http://www.memtest.org/) works great, though. It's a fork > from memtest86. FEH! memtest86+ can be crap. Version 1.30 had a very bad bug where it would report all memory above 4GB on Opteron systems as bad. I replaced a motherboard and a complete set of 8x1GB DIMM's because of it. Very unfortunately for me 1.30 was the latest version when FreeBSD/amd64 had the busdma bug that would corrumpt data. (thus why I was bothering to test my memory). Anyone using memtest86+ on AMD64 should make sure they have version 1.40. memtest86 (the original) versions below 3.2 had fatal bugs on AMD64 CPU's also. -- -- David (obrien@FreeBSD.org)
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