T7400 Precision Hard drive installation

I got two Seagate Barracuda hard drives, each at 1TB, SATA2. Maybe this is a dumb question, but I can't seem to get the T7400 to recognize the new drive. It doesn't show up in "My Computer", though it is recognized as boot-up (ID03).

At the bios, these are the settings:

SAS Controller is On

SATA-0 is On (recognized in Drive ID as the DVD-drive)

SATA-1 is Off (tried On, but it didn't find anything on boot-up)

SATA-2 is Off (tried the same as SATA-1)

SATA Operation set at ACHI

I have previously 2 drives in RAID-0 configuration (operating system), and one for storage (F-drive). I want to transferred the data from the F-drive onto the new HD, and after removing it add my last Barracuda to complement the system as extra storage space.