Date: Wed, 27 Aug 2003 22:58:59 +0200 From: David Landgren <david@landgren.net> To: freebsd-questions@freebsd.org Subject: Re: Large memory issues Message-ID: <3F4D1B93.3070905@landgren.net> In-Reply-To: <20030827210405.E28625@fling.sanbi.ac.za> References: <20030827133322.X83260@fling.sanbi.ac.za> <3F4CE8D2.6010605@landgren.net> <20030827210405.E28625@fling.sanbi.ac.za>
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Irvine Short wrote: [...] >>>and then later it says on the console something like: >>>256MB of RAM over 4GB ignored. >>> >>>Seems silly to waste 256MB RAM so any hints would be appreciated here >>>too. >> >>How can you address more than 2^32 bytes of RAM with a 32 bit >>processor? :) > > > Yeah, I know about PAE, but it's a 4GB machine so why is there 256MB over > the 4GB limit? I dunno, if you count the chips what do you come up with? I recently bought a whole pile of servers (HP DL380s if you've been following my trials and tribulations) that are designed to accept up to 6Gb on the motherboard. I think it's a bit of a gimmick really. One of the servers came bundled with 4.5Gb RAM. We wanted 4Gb, but the machine comes with 512 by default (2x256 chips [1]). Our supplier just stuck in 4x1Gb chips without bothering to remove the existing chips. As the servers all had different chip sizes, 256Mb, 512 and 1Gb, by mixing and matching I was able to remove the wasted 512Mb and install it in another server. Maybe you can do something like that. Or put it on a shelf for spare parts. David [1] DIMMs, SIMMs, whatever they call them these days.
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