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

[Jeff Garzik]

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



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