Reclaiming Space of Unmapped (Orphan) LUNs

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

To list the LUNs in a filer that are not mapped to any server and therefore safe to remove, right-click the disk NetApp Filer icon > KM Commands > LUNs Mapping Table... . Whether a LUN is actually mapped or not is also shown in the infobox of each volume instance.

LUN Properties - Infobox tab

To Generate a List for Mapped/Unmapped LUNs

1.In the PATROL Console, click the NetApp Filers icon (to generate a mapping table for all monitored NetApp Filers), or select the specific NetApp Filer for which you need to know LUNs mapping conditions > KM Commands > LUNs Mapping Table...

2.Configure the options of the LUNs list.

LUNs Mapping Table - Settings

3.Click Show Report to display the list of LUNs according to the options previously set.

LUNs Mapping Table - Results