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From: "Derrick Ryalls" <ryallsd@datasphereweb.com>
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Date: Thu, 20 Nov 2003 12:56:45 -0800
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Subject: RE: 200gb hard drive?
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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.