From owner-freebsd-hackers Sat Jul 6 16:13:58 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7231B37B400 for ; Sat, 6 Jul 2002 16:13:56 -0700 (PDT) Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id 72D0443E31 for ; Sat, 6 Jul 2002 16:13:55 -0700 (PDT) (envelope-from ticso@cicely5.cicely.de) Received: from cicely5.cicely.de (cicely5.cicely.de [IPv6:3ffe:400:8d0:301:200:92ff:fe9b:20e7]) (authenticated bits=0) by srv1.cosmo-project.de (8.12.3/8.12.3) with ESMTP id g66NDoMa017850 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=OK); Sun, 7 Jul 2002 01:13:53 +0200 (CEST) (envelope-from ticso@cicely5.cicely.de) Received: from cicely5.cicely.de (localhost [IPv6:::1]) by cicely5.cicely.de (8.12.1/8.12.1) with ESMTP id g66NDmFJ045792 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Sun, 7 Jul 2002 01:13:49 +0200 (CEST)?g (envelope-from ticso@cicely5.cicely.de) Received: (from ticso@localhost) by cicely5.cicely.de (8.12.1/8.12.1/Submit) id g66NDlZP045791; Sun, 7 Jul 2002 01:13:47 +0200 (CEST)?g (envelope-from ticso) Date: Sun, 7 Jul 2002 01:13:46 +0200 From: Bernd Walter To: Terry Lambert Cc: Darren Pilgrim , ticso@cicely.de, freebsd-hackers@FreeBSD.ORG Subject: Re: How does swap work address spacewise? Message-ID: <20020706231346.GJ23704@cicely5.cicely.de> Reply-To: ticso@cicely.de References: <20020705113532.GA11273@atrbg11.informatik.tu-muenchen.de> <20020705133515.GA295@HAL9000.wox.org> <20020705133837.GA513@HAL9000.wox.org> <20020705234126.GA12183@atrbg11.informatik.tu-muenchen.de> <3D2640A7.3EA2236B@pantherdragon.org> <20020706020656.GL48977@cicely5.cicely.de> <3D2762FE.9D9E0378@pantherdragon.org> <20020706220720.GG23704@cicely5.cicely.de> <3D277274.B5F3CE58@pantherdragon.org> <3D2776BE.A39A1110@mindspring.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3D2776BE.A39A1110@mindspring.com> X-Operating-System: FreeBSD cicely5.cicely.de 5.0-CURRENT i386 User-Agent: Mutt/1.5.1i Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sat, Jul 06, 2002 at 04:01:18PM -0700, Terry Lambert wrote: > Darren Pilgrim wrote: > > > > I thought the limit for filesystems was 2TB? > > > > > > The Blocknumber is signed that gives: > > > 2^31 * 512Bytes > > > > Why sign the blocknumber? LBA uses an unsigned 32-bit integer, > > allowing 2TB, and IIRC SCSI uses an unsigned integer as well (though I > > can't remember if that one is 32 or 48 bits, or if they've gotten to > > 64 bits by now). > > To differentiate between direct (positive) and indirect (negative) > blocks within the inode, and within an indirect block. Inodes hold fs blocks which are different from device blocks. On UFS they are sized equaly to fragments. And I never saw negative blocknumbers in inodes or indirect blocks. The difference is made just with the location of the entry. Do you have a special filesystem in mind? -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message