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To: Andrew Morton <akpm@osdl.org>
Cc: Frediano Ziglio <freddyz77@tin.it>, axboe@suse.de,
       linux-kernel@vger.kernel.org
Subject: Re: Packet writing problems
References: <1092669361.4254.24.camel@freddy> <m3acwuq5nc.fsf@telia.com>
	<m3657iq4rk.fsf@telia.com> <1092686149.4338.1.camel@freddy>
	<m37jrxk024.fsf@telia.com>
From: Peter Osterlund <petero2@telia.com>
Date: 17 Aug 2004 22:24:43 +0200
In-Reply-To: <m37jrxk024.fsf@telia.com>
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Peter Osterlund <petero2@telia.com> writes:

> Frediano Ziglio <freddyz77@tin.it> writes:
> 
> > Il lun, 2004-08-16 alle 21:09, Peter Osterlund ha scritto:
> > ...
> > > 
> > > The second problem is in the dvdrw-support patch in the -mm kernel.
> > > (This patch is also included in the patch you are using.)
> > > 
> > > The problem is that some drives fail the "GET CONFIGURATION" command
> > > when asked to only return 8 bytes. This happens for example on my
> > > drive, which is identified as:
> > > 
> > >         hdc: HL-DT-ST DVD+RW GCA-4040N, ATAPI CD/DVD-ROM drive
> > > 
> > > Since the cdrom_mmc3_profile() function already allocates 32 bytes for
> > > the reply buffer, this patch is enough to make the command succeed on
> > > my drive.
> > > 
> > 
> > I'm forgetting... 
> > 
> > mounting devices it reports that disk was CD-RW and speed was 15
> > (DVD-RW) and 31 (DVD+RW).
> 
> That shouldn't cause any real problems, but since it's quite
> confusing, here is a patch to fix it.  With this change, both DVD+RW
> and DVD-RW media is correctly identified in the kernel log, and DVD
> speeds are printed in kB/s.

I forgot to say:

Signed-off-by: Peter Osterlund <petero2@telia.com>

-- 
Peter Osterlund - petero2@telia.com
http://w1.894.telia.com/~u89404340