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From: Jeff Garzik <jeff@garzik.org>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Daniela Engert <dani@ngrt.de>,
	Boaz Harrosh <bharrosh@panasas.com>,
	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>
Subject: Re: [PATCH] libata: rewrite SCSI host scheme to be one per ATA host
Date: Wed, 22 Apr 2009 14:36:22 -0400	[thread overview]
Message-ID: <49EF63A6.8040103@garzik.org> (raw)
In-Reply-To: <1240414622.3431.14.camel@mulgrave.int.hansenpartnership.com>

James Bottomley wrote:
> 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.

Like Alan's, if I understand him correctly, my PATA ATAPI CD changer 
simply presents a bunch of addressible LUNs.  I never loaded, nor seemed 
to need, ch.

I should boot a current libata and see how it behaves...

	Jeff




  parent reply	other threads:[~2009-04-22 18:36 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-22  9:09 [PATCH] libata: rewrite SCSI host scheme to be one per ATA host Jeff Garzik
2009-04-22  9:23 ` Jeff Garzik
2009-04-22 12:16   ` Boaz Harrosh
2009-04-22 15:10     ` Daniela Engert
2009-04-22 15:18       ` Alan Cox
2009-04-22 15:37         ` James Bottomley
2009-04-22 16:27           ` Alan Cox
2009-04-22 18:36           ` Jeff Garzik [this message]
2009-04-22 19:27             ` James Bottomley
2009-04-22 16:48     ` Jeff Garzik
2009-04-23  6:35   ` Jens Axboe
2009-04-23 10:39     ` Jeff Garzik
2009-04-23 10:43       ` Jens Axboe
2009-04-22 13:09 ` Mark Lord
2009-04-22 16:52   ` Jeff Garzik
2009-04-22 19:08 ` Grant Grundler
2009-04-23 11:00   ` Jeff Garzik
2009-04-23 17:59     ` Grant Grundler
2009-04-23 18:09       ` James Bottomley
2009-04-24 11:00   ` Stefan Richter

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