Date: Sun, 7 Jul 2002 01:13:46 +0200 From: Bernd Walter <ticso@cicely5.cicely.de> To: Terry Lambert <tlambert2@mindspring.com> Cc: Darren Pilgrim <dmp@pantherdragon.org>, ticso@cicely.de, freebsd-hackers@FreeBSD.ORG Subject: Re: How does swap work address spacewise? Message-ID: <20020706231346.GJ23704@cicely5.cicely.de> In-Reply-To: <3D2776BE.A39A1110@mindspring.com> 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>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020706231346.GJ23704>