Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 85)

9. After the batch file has run, reboot your system.
Defragmenting a Volume Containing Persistent Images
NOTICE: Defragmenting a volume containing persistent images without using the following procedure can corrupt your
persistent images and degrade your system performance.
NOTICE: To defragment a volume, you must delete all persistent images on that volume.
NOTE: If you do not have persistent images on your volume, this procedure does not apply.
To defragment a volume containing persistent images, perform the following steps:
1. Log in to the NAS Manager.
NOTE: The default administrator user name is administrator and the default password is powervault.
2. Click Disks.
3. Click ActiveArchive.
4. Click Schedules.
5. Select a scheduled persistent image, and then click Delete.
6. Repeat step 5 until all scheduled persistent images are deleted.
7. Click Back.
8. Click Persistent Images.
9. Select a persistent image, click Delete, click OK, and then click OK.
10. Repeat step 9 until all persistent images are deleted.
11. Click Maintenance.
12. Click Terminal Services.
13. Log in to the NAS system.
14. Click Exit, and then OK to close the Advanced Administration Menu.
15. Double-click My Appliance.
16. Right-click the drive that you want to defragment, and click Properties.
17. Click Tools.
18. Click Defragment Now.
The Defragmentation window displays.
19. Click Defragment.
You are notified when defragmentation is complete.
20. Exit Terminal Services Client.
21. Reschedule your persistent images for this volume.