hey dude,,
have u installed ur sceond HDD yet?
well, try to see in the other end of ur HDD where u attached the Data cable and power cables u can see there a tiny LEDS and Jamper right?
if u can see its positioned to its default as Primary master.
so meaning in your second HDD u will adjust the jumper into Slave position see and label in the top of ur HDD
and then if u are using IDE ur second HDD should be attach in the secondary
i pressume u know that when doing tthese things u must turn off ur PC
and after restart it.then go to CMOS set-up
configure your settings.
OK?