Hi Rodrigo,
Assure, Perform, and Plan are licensed by TB.
Balance has two licensing options as of Nov 21, 2011.
- Capacity based: For non-NetApp storage (EMC, Dell, IBM, HDS, HP) is licensed by TB with a minimum of 10 TB, in 5 TB increments.
- Controller-based: Value priced for NetApp systems is priced per controller.
Please contact me directly if you have a specific scenario you'd like to discuss.
Best,
Lisa