Western Digital WD Sentinel DS6100 Administrator and Maintenance Guide - Manual (Page 52)

MANAGING STORAGE ON THE WD SENTINEL SERVER
46 WD SENTINEL DS5100/DS6100
ADMINISTRATOR AND MAINTENANCE GUIDE
3. On the Create Options pull-down menu, select a RAID option.
 It is a best practice to select RAID 5 for your WD Sentinel server storage.
4. Click Submit.
5. Click OK. Your RAID storage is created. Now, lets mount your new disk.
6. Right-click the lower-left corner of your desktop, then select Disk Management.