From owner-freebsd-questions@FreeBSD.ORG Wed Jan 10 23:50:26 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id DC1C716A415 for ; Wed, 10 Jan 2007 23:50:26 +0000 (UTC) (envelope-from erikt@midgard.homeip.net) Received: from ch-smtp01.sth.basefarm.net (ch-smtp01.sth.basefarm.net [80.76.149.212]) by mx1.freebsd.org (Postfix) with ESMTP id 952A813C448 for ; Wed, 10 Jan 2007 23:50:26 +0000 (UTC) (envelope-from erikt@midgard.homeip.net) Received: from c83-253-29-241.bredband.comhem.se ([83.253.29.241]:63520 helo=falcon.midgard.homeip.net) by ch-smtp01.sth.basefarm.net with smtp (Exim 4.63) (envelope-from ) id 1H4nD7-0002uR-51 for freebsd-questions@freebsd.org; Thu, 11 Jan 2007 00:50:25 +0100 Received: (qmail 44039 invoked from network); 11 Jan 2007 00:50:22 +0100 Received: from owl.midgard.homeip.net (10.1.5.7) by falcon.midgard.homeip.net with SMTP; 11 Jan 2007 00:50:22 +0100 Received: (qmail 54529 invoked by uid 1001); 11 Jan 2007 00:50:22 +0100 Date: Thu, 11 Jan 2007 00:50:22 +0100 From: Erik Trulsson To: Jay Chandler Message-ID: <20070110235022.GA54481@owl.midgard.homeip.net> Mail-Followup-To: Jay Chandler , Jeff MacDonald , FreeBSD Questions References: <45A56BF3.40209@chapman.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <45A56BF3.40209@chapman.edu> User-Agent: Mutt/1.5.13 (2006-08-11) X-ACL-Warn: Too high rate of unknown addresses received from you X-Scan-Result: No virus found in message 1H4nD7-0002uR-51. X-Scan-Signature: ch-smtp01.sth.basefarm.net 1H4nD7-0002uR-51 8f8dbdaa9e830f369c5bf9deca676320 Cc: Jeff MacDonald , FreeBSD Questions Subject: Re: Dell PE 1950 - Only seeing 3.2 gigs of ram X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jan 2007 23:50:26 -0000 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. ) -- Erik Trulsson ertr1013@student.uu.se