Creating and deleting RAID sets is a function found in the BIOS. During bootup, the following message will appear, pausing for a few moments to allow the user to choose what to do:
Press <CRTL-S> or F4 to enter RAID utility
An easy-to-use screen will appear with the following choices in the top left:
Create RAID Set
Delete RAID Set
Rebuild RAID Set
Resolve Conflicts
Below this will be listed the drives currently installed on the system.
The top right half of the screen displays directions and comments for the user. The bottom right half lists the command keys:
Arrows up and down are Select Keys
ESC takes the user to the previous menu
Enter selects the user's choice
Ctrl-E exits the utility