kern/162367: SATA 3.0Gb/s not enabled on Nvidia nForce 430

[Ronald F.Guilmette]

>Number:         162367
>Category:       kern
>Synopsis:       SATA 3.0Gb/s not enabled on Nvidia nForce 430
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Nov 08 00:20:01 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Ronald F. Guilmette
>Release:        FreeBSD 8.2-RELEASE amd64
>Organization:
entropy
>Environment:

	8.2-RELEASE GENERIC amd64

	Motherboard: Gigabyte GA-M55plus-S3G
			(chipset Nvidia Gforce 6100 + Nvidia nForce 430)

	Drive: Seagate ST3500320AS

>Description:
	I just recently installed 8.2-RELEASE/amd64 on this system and looking
	at dmesg output I noticed:

	ad4: 476940MB <Seagate ST3500320AS SD1A> at ata2-master UDMA100 SATA 1.5Gb/s

	I researched the drive (ST3500320AS) and found that it supports SATA
	@ 3.0Gb/s.  The motherboard allegedly does also.  But as you can see,
	I'm only getting 1.5Gb/s upon booting the system.

	I did some googling around to try to find the cause of the problem,
	and I found suggestions to enable AHCI in the BIOS, but apparently I
	can't, in part because there is no such BIOS option, and also because,
	apparently, the Nvidia nForce 430 doesn't actually support AHCI.

	But the nForce 430 _does_ allegedly support SATA 3.0Gb/s... just not
	via AHCI.  So, you know, I'd like to know if there's a way for me to
	enable the 3.0Gb/s support on this board.  So far I haven't found any
	way to do that.

	Some potentially relevant links:

	http://www.linuxquestions.org/questions/linux-hardware-18/help-getting-kernel-to-use-the-ahci-sata-driver-783508/

	  "The MCP61 is nForce 430, isn't it? This chip does not support AHCI."

	http://forums.freebsd.org/archive/index.php/t-22186.html

	http://www.wonkity.com/~wblock/docs/html/ahci.html

>How-To-Repeat:
	I would imagine that just installing and booting 8.2-RELEASE/amd64 on
	any motherboard with the Nvidia nForce 430 southbridge will exhibit
	the problem.

>Fix:
	Beats me!  I just work here (and I don't do drivers).


>Release-Note:
>Audit-Trail:
>Unformatted: