For CX3, you need to bind a LUN on each hot spare RG to activeate them. You can follow the steps in Navisphere's help manual:  "An unbound RAID Group component for the new RAID Group appears in the storage tree under the RAID Group component. You now need to bind a LUN on each HOT Spare RAID Group to activate them."  You don't need to activate hotspare RGs on CX4 and later.
Dear,  I have created 2 RAID Group Type Hot Spare with 2 disks in it as below.  1) Do I need to bind a LUN to activate it? 2) When i use the navsecli getdisk to display the disk, the hot spare disk Hot Spare: state is shown as unbound, is it normal?  (For another model VNX 5100, it's shown as Hot Spare Ready.   [IMAGE]
CX3-10c Hot Spare