On Wed, Feb 6, 2013 at 12:50 PM, <Valdis.Kletnieks@vt.edu> wrote:
On Wed, 06 Feb 2013 13:21:17 +0800, horseriver said:
>    At booting stage,kernel need to detect the hard device before mount it,
>    does this work  need pci's surport?

That depends.  Is the controller for the hard drive a PCI-based controller? On
most x86-based boxes, it is (and I'm not sure it's even possible to build an
x86 kernel that doesn't have PCI as a =y in the config).  However, very old
units may still have ISA based disk controllers, and other archs may have other
I/O buses.

Most new MB's have a SATA controller directly on the MB connected directly to either the North or South bridge (I don't know which).

I don't think any PCI is support needed to talk to the boot disk.

Greg