1. Open the Maxtor OneTouch Manager.
2. From the main menu, select the OneTouch III Turbo drive and click select Settings.
3. From the Setting screen, click the RAID tab.
4. To create the mirror, click the RAID 0 for Speed button.
   All data currently on the OneTouch III Turbo drive will be erased during this process. It is recommended that you backup any/all data stored on your OneTouch III Turbo drive before continuing.
   Click Erase to proceed.
   If prompted, enter your USERNAME and PASSWORD to authenticate.
5. You will be prompted to, "Please Confirm That You Intend to Destroy All Data On This Drive". To do this, type the number located in the left field into the empty text field located on the right of the confirmation screen. Once the number has been entered, click Erase Drive.
6. At this point, the RAID volume is configured. This may take awhile. After the volume has been configured, you will be prompted to initialize the drive. From the window displayed, click Initialize…
7. This will launch the Apple Disk Utility. Select the Maxtor drive located in the left column and click Erase.
8. From the Erase options, maintain the default Volume Format as Mac OS Extended (Journaled), enter a volume Name (e.g., Turbo) and click Erase.
9. The Erase Disk confirmation appears on your Desktop. Click Erase to proceed. At this point the OneTouch III Turbo Drive is partitioned and formatted. When complete, the newly created volume will appear on your Desktop.

Maxtor OneTouch III Video Tutorial – How to configure a RAID 0 Volume on the OneTouch III Turbo Edition for Mac OS X.

This will link you to a Flash Video that shows you how to configure a RAID 0 Volume on the OneTouch III Turbo Edition for Mac OS X (OS X – 10.3.9 & newer) using the Maxtor OneTouch Manager.