Quantum DXi4700

Chapter 10: Utilities
Space Reclamation
Quantum DXi4700 User’s Guide 347
l If the DXi is in Low Space state, compaction starts and continues to run until the DXi exits Low Space
state. The reclaimed space can be used to store new deduplicated or non-deduplicated data.
Note: The current compaction status is displayed on the Home page (see Home Page on page 110).
Caution: For correct system operation, space reclamation must be run at regular intervals (at least
once a week). Quantum recommends creating a schedule to automatically run space reclamation (see
Scheduling Space Reclamation on page 271). Because space reclamation can affect system
performance, avoid running space reclamation during known backup periods.
The space reclamation process can include up to four stages (see Space Reclamation Status on the next
page).
New or Normal Mode To increase performance, when space reclamation is initiated on the Space
Reclamation page or as a scheduled event, only Stage 2 (Calculating
Deletion Candidates) and Stage 3 (Deleting New Candidates) are run.
Low Space or Legacy Mode When disk capacity is low, space reclamation is automatically started to
free up disk space. In this case, all four stages of space reclamation are run.
To access the Space Reclamation page, click the Utilities menu, and then click the Space Reclamation
tab (see Figure 229 below).
Figure 229: Space Reclamation Page
The Space Reclamation page displays the following information about the current or most recent space
reclamation activity:
Status The status of space reclamation (see Space Reclamation Status on the next page).
Stage Progress The progress of the current space reclamation stage.
Total Progress The overall progress of space reclamation activity.
Start Time The time space reclamation started.