Re: AHCI support on Intel chipsets (confusion?)

2006-12-03 Thread Tejun Heo
Wayne Sherman wrote:
 So, does the kernel source code incorrectly indicate some of these
 chipsets are AHCI compatible?

Not really.  If the controller has PCI ID of 0x27c1, it's an ahci
controller.  Care to post full dmesg and the result of 'lspci -nn'?

-- 
tejun
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Re: AHCI support on Intel chipsets (confusion?)

2006-12-02 Thread Leon Woestenberg

Wayne,

On 12/2/06, Wayne Sherman [EMAIL PROTECTED] wrote:

Jeff Garzik,
...
my decision on the kernel source code.  It seems to indicate the Intel
ICH7 is AHCI compatible:


We (yesterday) found out that our board (a Supermicro PDSMI+, ICH7 as
well) needs the proper BIOS setting in order for it to appear as a
AHCI capable controller.

Precisely, we found if we enabled SATA Enhanced Mode, then enabled
AHCI in the BIOS, the chipset identifies itself as a 0x27c1 device
rather than a 0x27c0 device.

This is probably exactly the issue you ran into. Try your BIOS settings.

Regards,

Leon Woestenberg.
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Re: AHCI support on Intel chipsets (confusion?)

2006-12-02 Thread Wayne Sherman

Leon,

 Thanks for the reply.  I have enabled SATA Enhanced mode, but still 
did not see any mention of AHCI in my dmesg output.  I also did not find 
a setting for AHCI in the BIOS.  My board is a Gigabyte:


http://www.gigabyte.com.tw/Products/Motherboard/Products_Spec.aspx?ProductID=2304

  I was about to email GigaByte and ask them about AHCI, but I decided 
to do a search first.  That is when I found the Intel page that says 
ICH7 does not support AHCI.  If that is so, then I need a different 
motherboard.  Can you confirm that ICH7 does not support AHCI?


Thanks,

Wayne


Leon Woestenberg wrote:

Wayne,

On 12/2/06, Wayne Sherman [EMAIL PROTECTED] wrote:

Jeff Garzik,
...
my decision on the kernel source code.  It seems to indicate the Intel
ICH7 is AHCI compatible:


We (yesterday) found out that our board (a Supermicro PDSMI+, ICH7 as
well) needs the proper BIOS setting in order for it to appear as a
AHCI capable controller.

Precisely, we found if we enabled SATA Enhanced Mode, then enabled
AHCI in the BIOS, the chipset identifies itself as a 0x27c1 device
rather than a 0x27c0 device.

This is probably exactly the issue you ran into. Try your BIOS settings.

Regards,

Leon Woestenberg.


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Re: AHCI support on Intel chipsets (confusion?)

2006-12-02 Thread Wayne Sherman

Leon,

Leon Woestenberg wrote:

We (yesterday) found out that our board (a Supermicro PDSMI+, ICH7 as
well) needs the proper BIOS setting in order for it to appear as a
AHCI capable controller.


I just checked your motherboard:

http://www.supermicro.com/products/motherboard/Xeon3000/3000/PDSMi+.cfm

It uses an ICH7R, and according to the Intel page that one *DOES* 
supports AHCI.


Regards,

Wayne
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