Date: Thu, 20 Nov 2003 12:56:45 -0800 From: "Derrick Ryalls" <ryallsd@datasphereweb.com> To: "'Omer Faruk Sen'" <freebsd@faruk.net>, <freebsd-questions@freebsd.org> Subject: RE: 200gb hard drive? Message-ID: <A99A5AC30F74624388EE5F757BA58A20D7A04D@RED-MSG-50.redmond.corp.microsoft.com> In-Reply-To: <20031120202303.10773.qmail@fuzuli.enderunix.org>
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> I have installed a new hard drive to my FreeBSD system. Hard=20 > drive is 200gb=20 > but > when I fdisk and disklabel the output of "df -h" is something=20 > like that:=20 >=20 > /dev/ad1s1e 183G 2.0K 169G 0% /disk2=20 >=20 > Here as you can see I can only use 169GB of it. Bios has seen=20 > my harddrive=20 > as 190GB also dmesg output is like that:=20 >=20 > ad1: 190782MB <WDC WD2000JB-00DUA3> [387621/16/63] at=20 > ata0-slave UDMA100=20 >=20 > My question is what happened to 190-169 gb or maybe after=20 > some filesystem=20 > information reservation what happened to 183-169 gb?=20 >=20 > By the way I have used default newfs parameters -b 16384 -f=20 > 2048. I don't=20 > know if that helps...=20 >=20 When manufacturers talk about drive size, they use base 10. When = computer report drive size, they use base 2. So, if you divide 200,000,000 bytes = by ( 1024 * 1024 ), you get roughly 190gig in binary, so off the bat you = lose 10gigs of space due to marketspeak translation. FreeBSD reserves 8% for something (I forget what), so that brings it = down to 174gig. As for the last 5gig, dunno, sorry.
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