User Manual

33 Setting up NetVault Backup Native Virtual Tape Library on the Dell™ DR4X00 Disk Backup Appliance
7. Select OK in the Device Added Successfully window.
8. Close the Add Library window.
5.2.1.1 Disk Space Reclamation
Blanking of used media in NVBU VTL created on the DR4x00 share will not reclaim physical disk space. To
reclaim this space the nvmakemedia utility must be used to create a “clean” identical ‘.media’ file, in name
and size, to replace the old media file. Before this is done all drives must be unloaded and Open Door
command issued in NetVault: Backup Device Manager. Once all the desired media have been cleaned , the
Close Door option can issued. Check that all media appear correctly in Device Manager and Media
Manager. The recovered space will be reflected after the next DR4x00 clean cycle completes. Refer to
the NetVault: Backup Command Line Interface Users Guide at
https://support.quest.com/SearchDocumentation.aspx for more information on performing disk space
reclamation with a DR4x00 unit.
5.2.1.2 Disk Space Availability
Due to the nature of deduplication and various factors surrounding compression yield and disk space
utilization, users must avoid running out of physical disk space. Failing to do so will result in erroneous
behaviour with the backup software. Refer to NVBU JIRA NVG-4306, NVG-4307, and NVG-4308 for
details.