Hitachi 220H Bios Manual page 105

4. The following window is displayed.
Click a physical drive in Drives pane for building virtual drive.
If you build a new virtual drive, select two physical drives.
If you add a virtual drive to the already existing Drive Group, select nothing
and go to the step 7.
You can select only a drive which status is "Unconfigured Good"

(unused).
To select multiple drives, click the drives while pressing Ctrl

key.
Hitachi Compute Rack 210H/220H BIOS Guide
MegaRAID WebBIOS 2-41