Live LUN Expansion

In order to fulfill capacity requirements, you may need to add capacity to the storage array to increase the size of the LUN provisioned to the XenServer host. Live LUN Expansion allows you to increase the size of the LUN and use the newly gained space without detaching the storage repository (SR) or taking the hosts or VMs in the pool offline. This feature is supported on Software iSCSI and Hardware HBA SR types.

Warning: It is not possible to shrink or truncate LUNs. Reducing the LUN size on the storage array can lead to data loss.

To expand the size of the LUN:

  1. Add the extra storage to the storage array.
  2. Select the Infrastructure view and then click on the SR.
  3. Click the Storage tab in the Properties pane.
  4. Click Rescan. This operation rescans the SR and any extra capacity is added and made available.
Live LUN Expansion