Reclaiming unused storage capacity (NetApp specific)

Over time, as servers connected to a SAN get decommissioned, administrators find an increasing number of unmapped volumes that are no longer used by any server. These volumes, while unused, still occupy disk space in the storage system. Being able to identify such unmapped volumes and reclaim the disk space uselessly consumed by these volumes will help administrators avoid unnecessary upgrades and extensions of their storage systems.

Identifying unmapped LUNs

1. Access the NetApp Systems page:
   1. Log on to the TrueSight console.
   2. In the Navigation pane, click Capacity > Storage > NetApp Systems.
2. Click the LUNs tab.
   

3. Display unmapped LUNs:

   1. Click  next to No Mapped Filter and select Apply Mapped Filter.
   2. Select Not Mapped.
   3. Click Apply.

   

You can now reclaim the disk space uselessly consumed by these LUNs to avoid unnecessary upgrades and extensions.

Identifying unused LUNs

1. Access the NetApp Systems page:
   1. Log on to the TrueSight console.
   2. In the Navigation pane, click Capacity > Storage > NetApp Systems.
2. Click the LUNs tab.
   
3. If needed, apply filters.
4. Apply a filter to the Time Since Last Activity column:
   1. Click the Time Since Last Activity column.
   2. From the operator pull-down list, select equals.
   3. Type the number of days required (e.g.: 30).
   4. Click Filter.

The list of LUNs that have not been used for 30 days is displayed. You can now take the necessary actions and reclaim the unused space.