HP Instant Capacity User's Guide for versions B.07.x

Using Instant Capacity to Manage Processing Capacity
Assigning a Cell to a Partition
Chapter 4 65
In general, when an unassigned cell is assigned to a partition, the
Instant Capacity software determines the number of unassigned
processors in the complex that are licensed. The Instant Capacity
software uses these licenses to activate as many processors as possible in
the new cell.
NOTE Cell boards are assigned to specific partitions and cannot be shared
between partitions. All processors on a cell board are accessible only by a
maximum of one partition. Processors on one cell board cannot be shared
across multiple partitions.