Re: No NCQ support on X61s Ultrabay? (Intel ICH8 SATA controllerquestion)

[Matthew Wilcox]

On Thu, Apr 30, 2009 at 10:21:08PM -0600, Robert Hancock wrote:
> I'm suspecting that that Ultrabay slot might be using the PATA ports on  
> the chipset, with a PATA-SATA bridge chip or something. I haven't seen  
> an Intel chipset with some SATA ports using AHCI and some in PIIX mode  
> before, the ones I've seen with both had the PIIX mode driving PATA  
> ports. If it is indeed bridged through PATA on that laptop, there's no  
> way you're going to get any NCQ support on that slot.
>
> I don't know why Lenovo would do that, as it would kind of cripple SATA  
> drives in that slot, but hardware people do some bizarre things 
> sometimes..

I have to agree with Robert.  If you look at the ich8 data sheet
(313056-003), the mobile version has 3 ATA ports and 1 IDE port "that
can be electrically isolated".  See pages 41, 43, and 50-51.  on page 41,
it says the IDE port has "Tri-state modes to enable swap bay".

So I don't blame Lenovo for hooking up the Ultrabay slot using the IDE
port.  They were pretty much told to do it.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/