When you create a LUN, the LUN is unassigned. To access your storage system from an iSCSI-attached device, you need to create a LUN group and assign one or more LUNs to the LUN group.
LUN groups allow you to organize LUNs and manage access rights to LUN groups. Access rights are either open or granted through internal CHAP authentication. Access rights apply to LUN groups, not to individual LUNs. You can easily assign a LUN to a LUN group or move a LUN from one LUN group to another LUN group.
Each LUN group has an iSCSI target address (for example, iqn.1994-11.com.netgear:f2f2fdd4) that allows iSCSI clients to access the LUN group. Each ReadyNAS supports a maximum of 256 iSCSI targets. For more information on configuring client access to a LUN group, see the How do I manage access rights for LUN groups on my ReadyNAS OS 6 storage system?
For more information on creating and managing LUN groups, see the following support articles: