From owner-freebsd-hackers@FreeBSD.ORG  Mon Jun  2 07:44:51 2003
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
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 62F7137B401
	for <freebsd-hackers@freebsd.org>;
	Mon,  2 Jun 2003 07:44:51 -0700 (PDT)
Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.86.163])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 36BC443F75
	for <freebsd-hackers@freebsd.org>;
	Mon,  2 Jun 2003 07:44:50 -0700 (PDT)
	(envelope-from phk@phk.freebsd.dk)
Received: from critter.freebsd.dk (localhost [127.0.0.1])
	by critter.freebsd.dk (8.12.9/8.12.9) with ESMTP id h52EicnA011068;
	Mon, 2 Jun 2003 16:44:44 +0200 (CEST)
	(envelope-from phk@phk.freebsd.dk)
To: Andrew <andrew@ugh.net.au>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Tue, 03 Jun 2003 00:22:19 +1000."
             <20030603001755.S68271-100000@starbug.ugh.net.au> 
Date: Mon, 02 Jun 2003 16:44:38 +0200
Message-ID: <11067.1054565078@critter.freebsd.dk>
cc: freebsd-hackers@freebsd.org
Subject: Re: Retrieving disk geometry 
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 02 Jun 2003 14:44:51 -0000

In message <20030603001755.S68271-100000@starbug.ugh.net.au>, Andrew writes:
>Hi,
>
>Under FreeBSD 4.x the ioctl DIOCGDINFO could be used to retrieve the
>number of cylinders, heads and sectors of a drive. This could be called on
>/dev/ad0 for example. Under FreeBSD 5 it seems to produce "Inappropriate
>ioctl for device" unless you call it on an individual partition
>(/dev/ad0s1a for example).
>
>Is there a way around this?

Use the ioctls you find in <sys/disk.h> they should work on all
disk devices.

-- 
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.