Dell DR4000 - Manual (Page 14)

14 Setting Up the Dell™ DR Series System on Symantec NetBackup to Use Backup Acceleration | May 2014
7. Created storage server should be listed.
8. Right-click on Media and Device Management -> Devices -> Disk Pool. Click New.
9. In the Disk Pool Configuration Wizard dialog box, select OpenStorage (DELL) for Type.