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Date: Sun, 26 Sep 2010 20:52:54 +0300
From: Andriy Gapon <avg@icyb.net.ua>
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To: David DEMELIER <demelier.david@gmail.com>
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Cc: freebsd-stable <freebsd-stable@freebsd.org>,
	Jeremy Chadwick <freebsd@jdc.parodius.com>
Subject: Re: Failure to burn with ahci mode.
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on 26/09/2010 20:37 David DEMELIER said the following:
> markand@Melon ~ $ sudo camcontrol devlist
> <WDC WD3200BEKT-60F3T1 12.01A12>   at scbus0 target 0 lun 0 (ada0)
> <hp DVDRAM GT20L DC05>             at scbus1 target 0 lun 0 (cd0)
> 
> markand@Melon ~ $ sudo cdrecord downloads/FreeBSD-8.1-RELEASE-amd64-livefs.iso
> cdrecord: No write mode specified.
> cdrecord: Assuming -sao mode.
> cdrecord: If your drive does not accept -sao, try -tao.
> cdrecord: Future versions of cdrecord may have different drive
> dependent defaults.
> Cdrecord-ProDVD-ProBD-Clone 3.00 (amd64-unknown-freebsd8.1) Copyright
> (C) 1995-2010 Jörg Schilling
> cdrecord: Error 0. Cannot open or use SCSI driver.
> cdrecord: For possible targets try 'cdrecord -scanbus'.
> cdrecord: For possible transport specifiers try 'cdrecord dev=help'.
> 
> markand@Melon ~ $ sudo cdrecord -scanbus
> Cdrecord-ProDVD-ProBD-Clone 3.00 (amd64-unknown-freebsd8.1) Copyright
> (C) 1995-2010 Jörg Schilling
> cdrecord: Error 0. Cannot open or use SCSI driver.
> cdrecord: For possible targets try 'cdrecord -scanbus'.
> cdrecord: For possible transport specifiers try 'cdrecord dev=help'.

Doesn't look like you have xpt and pass devices in your kernel, which are
(almost) mandatory when use CAM-based drivers.
Not sure if ahci(4) mentions this.

-- 
Andriy Gapon