ahci: attachment to atapi device

[Matthew Dillon]

:On Mon, Jun 15, 2009 at 09:47:54AM +0200, Francois Tigeot wrote:
:> 
:> I just tested the new ahci driver on a Core 2 machine with ICH7 chipset.
:> It attachs to a SATA DVD burner, which I believe should be left to the nata
:> driver.
:> Kernel is 2.3.1 GENERIC with SMP enabled (no apic).
:
:I just plugged the CD burner back.
:It still attaches to ahci, but now works fine.
:
:dmesg extract:
:
:Mounting root from ufs:/dev/da0s1a
:ahci0.1: TFES slot 11 ci_saved = 00000800
:ahci0.1: Copying error rfis slot 11
:ahci0.1: WARNING!  Unload prdbc resid was zero! tag=11
:cd0 at ahci0 bus 1 target 0 lun 0
:cd0: <ASUS DRW-1814BLT 1.04> Removable CD-ROM SCSI-0 device 
:cd0: 150.000MB/s transfers
:cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
:
:It is much faster than with the nata driver. I measured about a 4x speedup
:when burner regular CD images.
:
:-- 
:Francois Tigeot

    Its good that it works.  I think it may only be faster because the
    cdrecord software is probing the burn speed more effectively.  burncd
    never could do that very well.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>