PCI device ordering

[adler-wRvlPVLobi1/31tCrMuHxg at public.gmane.org (Stephen Adler)]

Hi blu,

I'm trying to upgrade a server from rhel5 to rhel6 to find that the 
order by which the kernel "discovers" the attached devices changes. 
Specifically, the mother board has 6 sata ports and I added 4 more using 
a PCI-e card. Under the 2.6.18 kernel of rhel5, the on board 6 channel 
sata controller is listed first and the PCI-e 4 port sata controller 
comes second. When I boot up under 2.6.32 kernel of rhel6, the PCI-e 
controller is seen first and then the on board 6 port controller is 
"seen" second. What this does is jumble up the driver order so that 
/dev/sda under the 2.6.8 kernel is now /dev/sdd under the 2.6.32 kernel. 
Is there anyway to force the kernel to scan the onboard sata controller 
first and then the PCI-e controller second?

Thanks. Steve.