Date: Fri, 9 Sep 2005 21:04:33 +0200 From: Thomas Quinot <thomas@FreeBSD.ORG> To: Claude Buisson <cbuisson@nerim.net> Cc: freebsd-current@freebsd.org Subject: Re: 6.0-BETA4 changes numbering of atapicam devices Message-ID: <20050909190432.GA25245@melusine.cuivre.fr.eu.org> In-Reply-To: <43216CA9.2010804@nerim.net> References: <43216CA9.2010804@nerim.net>
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* Claude Buisson, 2005-09-09 :
> acd0 -> cd0
> acd1 -> cd1
There is absolutely no notion of such mapping in ATAPI/CAM. The order
in which device numbers are assigned by the cd driver depends only on
CAM scan order. What ATAPI/CAM guarantees is that the master device
is target 0, and the slave is target 1:
> cd0 at ata1 bus 0 target 1 lun 0
^
> cd1 at ata1 bus 0 target 0 lun 0
^
The assignment of unit numbers by the cd driver is dependant on the
CAM scan order; you can force fixed numbering by wiring down the target
-> unit mapping in your hints file.
Thomas.
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