From owner-freebsd-questions@FreeBSD.ORG Thu Mar 27 14:35:41 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2F632106566B for ; Thu, 27 Mar 2008 14:35:41 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id AF5B28FC25 for ; Thu, 27 Mar 2008 14:35:40 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1JetCd-0006U7-Ii for freebsd-questions@freebsd.org; Thu, 27 Mar 2008 14:35:39 +0000 Received: from lara.cc.fer.hr ([161.53.72.113]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 27 Mar 2008 14:35:39 +0000 Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 27 Mar 2008 14:35:39 +0000 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: Ivan Voras Date: Thu, 27 Mar 2008 15:35:32 +0100 Lines: 45 Message-ID: References: <003501c89014$77ddf640$6799e2c0$@com> <20080327142605.6190DC33C@cork.irdesign.cypress.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigC1A87195F072242B18E28555" X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr User-Agent: Thunderbird 2.0.0.6 (X11/20071022) In-Reply-To: <20080327142605.6190DC33C@cork.irdesign.cypress.com> X-Enigmail-Version: 0.95.0 Sender: news Subject: Re: FreeBSD-6.3 only detects 3GB 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: Thu, 27 Mar 2008 14:35:41 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigC1A87195F072242B18E28555 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable lhecking@users.sourceforge.net wrote: > fred writes: >> Hello all, >> >> I am trying to fix an issue with my dual xeon ibm server, it only dete= cts >> 3GB or RAM but I have 4GB: > [...] >=20 > I have seen this problem under Linux on IBM Intellistations (6225). > IBM pointed me to a tech document (the number of which I do not > remember) that says when the machine detects more than 3GB, it uses > some of that memory internally for ... stuff. Still, I find stealing > 1GB quite unacceptable. This question is answered almost once a week. Search the archives and you will find plenty of explanations, both long and short. Short version: you cannot use memory near 4 GB on 32-bit operating systems (it's a hardware limitation). You can either compile a kernel with PAE (http://en.wikipedia.org/wiki/Physical_Address_Extension) or a 64-bit version of the operating system (in FreeBSD it's called AMD64 since AMD was first to create the hardware, http://en.wikipedia.org/wiki/AMD64). --------------enigC1A87195F072242B18E28555 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFH67C0ldnAQVacBcgRArRhAJ4yhaHMOMy+vUXu7qa/DHEPm97WUQCeLxic 4n5dDcee2cUikSPkIZJoDOw= =wIFE -----END PGP SIGNATURE----- --------------enigC1A87195F072242B18E28555--