From: Jeff Garzik <jeff@garzik.org>
To: James Cloos <cloos@jhcloos.com>
Cc: linux-ide@vger.kernel.org
Subject: Re: AMD 890GX vs 6Gbps SATA?
Date: Sun, 14 Nov 2010 23:08:39 -0500 [thread overview]
Message-ID: <4CE0B247.50002@garzik.org> (raw)
In-Reply-To: <m3mxpbn69i.fsf@jhcloos.com>
On 11/14/2010 12:50 PM, James Cloos wrote:
> All of the ad copy and doc I can find claim that the sata controller in
> the 890gx supports 6Gbps sata3. But I still get this:
>
> ahci 0000:00:11.0: AHCI 0001.0200 32 slots 6 ports 3 Gbps 0x3f impl SATA mode
> ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> ata2.00: ATA-8: WDC WD1002FAEX-xxxxxx, 05.xxxxx, max UDMA/133
>
> I hadn't noticed before because that box's first drive only supports 3 Gbps.
>
> Does the 6Gpbs mode require that all of the disks are sata3? (That would
> be /most/ annoying, given that optical drives all seem to be 1.5Gbps.)
No, on SATA each link is entirely independent of the other links
(ignoring port multipliers).
The "3 Gbps" maximum you see on the first line comes directly from what
capabilities the chip reports, so perhaps the firmware/BIOS is not
initializing the chip properly.
AHCI 1.2 hardware, the AHCI driver and libata core should all support
operation at 6 Gbps.
Jeff
next prev parent reply other threads:[~2010-11-15 4:08 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-14 17:50 AMD 890GX vs 6Gbps SATA? James Cloos
2010-11-15 4:08 ` Jeff Garzik [this message]
2010-11-15 16:39 ` James Cloos
[not found] <2DEEA3AB13739D45A22ADDB5086AEA0B915107@sshaexmb1.amd.com>
2010-11-15 7:45 ` Huang, Shane
2010-11-15 16:31 ` James Cloos
2010-11-15 17:02 ` Huang, Shane
2010-11-15 17:11 ` James Cloos
[not found] ` <4CE179B4.4090404@hardwarefreak.com>
[not found] ` <m3fwv2ju9y.fsf@jhcloos.com>
2010-11-15 19:33 ` Stan Hoeppner
2010-11-15 19:40 ` James Cloos
2010-11-16 14:31 ` Mark Lord
2010-11-16 10:04 ` Huang, Shane
2010-11-17 0:31 ` Stan Hoeppner
2010-11-17 0:38 ` Stan Hoeppner
2010-11-17 2:48 ` Huang, Shane
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