From owner-cvs-src@FreeBSD.ORG  Mon Nov 19 16:14:43 2007
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To: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Mon, 19 Nov 2007 17:09:07 +0100."
	<86lk8umd3w.fsf@ds4.des.no> 
Date: Mon, 19 Nov 2007 16:14:23 +0000
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Sender: phk@critter.freebsd.dk
Cc: Scott Long <scottl@samsco.org>, src-committers@FreeBSD.ORG,
	cvs-src@FreeBSD.ORG, cvs-all@FreeBSD.ORG, Nate Lawson <nate@root.org>,
	=?utf-8?Q?S=C3=B8ren?= Schmidt <sos@deepcore.dk>
Subject: Re: cvs commit: src/sys/dev/ata atapi-cd.c atapi-cd.h 
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In message <86lk8umd3w.fsf@ds4.des.no>, =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= wr
ites:
>"Poul-Henning Kamp" <phk@phk.freebsd.dk> writes:
>> In message <473DD94D.8050605@samsco.org>, Scott Long writes:
>> > But then why not have g_access be able to communicate the ability to
>> > access the device independent from the ability to access the media?
>> > Seems like both of these questions are "access" questions.
>> Because that is a lot more work for no benefit I can see ?
>
>There is another closely related problem which also needs fixing and
>which also requires GEOM to distinguish between device and media: GEOM's
>behaviour when the media changes while the device is open (e.g. burning
>a CD).  AFAIK, it is not currently possible to properly fixate a CD-R in
>FreeBSD; the CDRIOCFIXATE ioctl always fails because once the media has
>changed (from blank to non-blank), all access fails until you close and
>reopen the device.

This is so CD specific that somehow it must be managed inside the driver.

-- 
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.