Reclaiming Freed Space

Last published : Oct 01, 2026
Use the Reclaim freed space option in XenCenter you to free up unused blocks on a LUN that is thinly provisioned by the storage array. Once released, the array can then reuse the reclaimed space. The Reclaim freed space operation is only available for LVM-based SRs that are thinly provisioned on the array. These SR types are iSCSI, Fibre Channel, or Local LVM. This feature is not enabled on file-based SRs such as NFS and EXT3/EXT4 as these SR types do not require a manual space reclamation operation.
To reclaim freed space:
  1. Select the Infrastructure view and then select the host or the pool that contains the SR.
  2. Select the Storage tab.
  3. Select the SR from the list and then select Reclaim freed space.
    Note:
    Reclaiming freed space is an intensive operation and can affect the performance of the storage array. Perform this operation only when space reclamation is required on the array. Citrix® recommends that you schedule this work outside the peak array demand hours.
  4. Click Yes to confirm the operation. To view the status of this operation, select Notifications and then Events.
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