From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Bottomley <James.Bottomley@HansenPartnership.com>
Subject: Re: [PATCH] libata: rewrite SCSI host scheme to be one per ATA host
Date: Wed, 22 Apr 2009 15:37:02 +0000
Message-ID: <1240414622.3431.14.camel@mulgrave.int.hansenpartnership.com>
References: <20090422090929.GA14928@havoc.gtf.org>
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Daniela Engert <dani@ngrt.de>, Boaz Harrosh <bharrosh@panasas.com>, Jeff Garzik <jeff@garzik.org>, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>, Jens Axboe <jens.axboe@oracle.com>, Tejun Heo <htejun@gmail.com>
List-Id: linux-ide@vger.kernel.org

On Wed, 2009-04-22 at 16:18 +0100, Alan Cox wrote:
> > Don't forget, there are ATAPI devices (some Sony CD burners and old 
> > phase-changers come into mind) which *do* have multiple LUNs sitting 
> > beyond the PATA port. I don't know if libata supports such setups (my 
> > old OS/2 driver does) but one shouldn't hijack LUNs to emulate targets.
> 
> It's a long time ago since I tested it but my 5 CD changer was correctly
> supported by libata (or more accurately by sr...).

Well, sr supports the discovered CD/DVD; ch is the actual changer
manager.  Usually ch attaches to one LUN and sr attaches to another.

James