ASROCK 939S56-M Manual page 3

2. Viewing the "Create Raid"
Click the tab Create Raid, you can find three drop-down box and three
panes. Those meaning will be showing below.
1. Raid Type:
Click the drop-down box "Raid Type". This box enables the user to select
array type. There are three array types that the user can select: JBOD,
RAID 0, and RAID 1. User can select any one array type to create a RAID
set.
NOTE
If your SATA hard disks are already configured in any RAID type,your
SATA hard disks could not appear in the <Available Disks> pane.