Looks like if I get the PreOS drivers from dell they come with the usual iaAHCI and the iaStor.
If i run a tap under AHCI Mode I get the following device
PCI\VEN_8086&DEV_3B2F
This entry is in the iaAHCI.inf for the PreOS Drivers
If I run tap under Legacy IDE Mode I get this device
PCI\VEN_8086&DEV_3B2D
This Entry ISNT in the iaStor.inf file
This is why I think adding the iaStor for the 6410 isnt working for me but is for the AHCI.
I wish i understood inf files a bit better to just manually edit. Ill have to poke around.