Date: Wed, 10 Jan 2007 17:46:36 -0800 From: Jay Chandler <chandler@chapman.edu> To: Dak Ghatikachalam <dghatikachalam@gmail.com> Cc: Jeff MacDonald <bignose@gmail.com>, FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Dell PE 1950 - Only seeing 3.2 gigs of ram Message-ID: <45A596FC.8040907@chapman.edu> In-Reply-To: <ba29b9b40701101738v29618198lb9a6999176091b6a@mail.gmail.com> References: <f17daf040701101347r4fa8f639u2421bff95a47f61@mail.gmail.com> <45A56BF3.40209@chapman.edu> <20070110235022.GA54481@owl.midgard.homeip.net> <ba29b9b40701101738v29618198lb9a6999176091b6a@mail.gmail.com>
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Dak Ghatikachalam wrote: > if you calculate the 32bit addressing capability > > 2^32 -1 = 4294967296 - 1 = 4GB -1 you could counter I/O space, IRQ > space > for all the devices attached. > > I have heard something like parity interleave(I may be misspelling that > word, but sounds close), you can knock off some more memory for this, and > something like memory hole, you should knock off some more memory > for this., sometimes video card also steal memory for acceleration, how > much of it all depends. > > regards > Dak > > On 1/10/07, Erik Trulsson <ertr1013@student.uu.se> wrote: >> >> On Wed, Jan 10, 2007 at 02:42:59PM -0800, Jay Chandler wrote: >> > Jeff MacDonald wrote: >> > >Hi, >> > > >> > >I put a fresh install of 6.1-RELEASE on a dell poweredge 1950 server. >> > >It's configured with 4 gigs of ram. >> > > >> > >However when I boot i get the following right before DMESG >> > > >> > >786432k above 4GB ignored >> > > >> > >Which is strange, but then dmesg shows this >> > > >> > >real memory = 3489300480 (3327 MB) >> > >avail memory = 3414659072 (3256 MB) >> > > >> > >Soo I'm at a bit of a loss. >> > > >> > >Jeff. >> > > >> > Same platform, same error. Anyone else have a clue for me? >> > >> >> Part of the 32-bit address space is reserved for various >> I/O-devices. This means that a 32-bit OS will not be >> able to use all 4 GB of RAM but only a smaller amount (usually >> around 3.5 GB.) >> >> If you were to use a 64-bit OS it would probably be able to access >> all of the RAM if some of it is remapped to above the 4 GB >> line. (There is usually an option in the BIOS to do this remapping.) >> >> >> (This information is provided by most motherboard manufacturers >> and many computer manufacturers (including Dell) in some FAQ. ) >> >> >> >> -- >> <Insert your favourite quote here.> >> Erik Trulsson >> ertr1013@student.uu.se >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to " >> freebsd-questions-unsubscribe@freebsd.org" >> On a related note for this hardware platform, has anyone gotten past the "randomly decides not to reboot when told to" issue? Requires a hard shutdown by hand, as the console becomes completely non-responsive. -- Jay Chandler Network Administrator, Chapman University 714.628.7249 / chandler@chapman.edu Today's Excuse: Our POP server was kidnapped by a weasel.
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