The iSCSI Storage screen allows you to view iSCSI targets. On this screen you can enable, disable, and edit targets, view each target's mapped LUNs, edit LUN mappings, take snapshots of LUNs, and configure the ISCSI access control list (ACL).
The Allocated column displays the space consumption of each LUN. Differences in calculation methods may result in different allocated space values on the NAS and the LUN host.