[CentOS] ma78gm and esata

Hi all,

my motherboard ma78gm is working.
I am trying to get working the esata.
I plug in my external driver, power cycle the external drive.
then turn on my machine.
My drive sda is detect as normal. however I dont see anything about any 
other disk.
dmesg didnt show anything.

Is there something special needed to activate the esata drive?

Jerry