linux-kernel - Re: [PATCH] libata: rewrite SCSI host scheme to be one per ATA host

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Date:	Wed, 22 Apr 2009 17:27:10 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
Cc:	Daniela Engert <dani@...t.de>, Boaz Harrosh <bharrosh@...asas.com>,
	Jeff Garzik <jeff@...zik.org>, linux-ide@...r.kernel.org,
	linux-scsi@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Tejun Heo <htejun@...il.com>
Subject: Re: [PATCH] libata: rewrite SCSI host scheme to be one per ATA host

> > 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.

I get 5 LUNS and the hardware looks after the rest - no changer manager
needed. Early versions of the gnome folks CD probing stuff did give it a
bit of a fit as the firmware clearly didn't cache all the state that the
cd mangler asked for.

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