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Date:      Mon, 26 Jan 2004 07:27:59 +0100
From:      "Poul-Henning Kamp" <phk@phk.freebsd.dk>
To:        slick <plan_b@videotron.ca>
Cc:        freebsd-geom@freebsd.org
Subject:   Re: code compatibility between normal and geom methods for accessingdisk devices 
Message-ID:  <62001.1075098479@critter.freebsd.dk>
In-Reply-To: Your message of "Sun, 25 Jan 2004 23:09:11 EST." <BDENIKJMJKOAJAMDFLDDCECICAAA.plan_b@videotron.ca> 

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In message <BDENIKJMJKOAJAMDFLDDCECICAAA.plan_b@videotron.ca>, slick writes:

>	I wrote an fdisk program which uses several read(2) and write(2).

You program needs to realize that disks have sectors.  You cannot
read a single byte from a disk at a time, you need to read an entire
sector and pick the byte out you want.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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