Live LUN Expansion

Last published : Oct 01, 2026
To fulfill capacity requirements, you might need to add capacity to the storage array to increase the size of the LUN provisioned to your XenServer® host. Use live LUN Expansion to increase the size of the LUN and use the newly gained space without detaching the SR or taking the hosts or VMs offline.
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 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.
Related information
Managing Storage

XenServer Current Release

  • Manage storage repositories