An Isilon customer currently has an 8-node cluster of older X-Series nodes. They are planning several
upgrades over the next three years in the followingstages:
· Stage 1: Add 2 X-Series nodes to meet performancegrowth · Stage 2: Add 4 NL-Series nodes to meet
archive capacity growth · Stage 3: Add 10 New X-Series nodes as a hardware refresh · Stage 4: Remove older
X-Series nodes
At which stage will a SmartPool license be required?

A.
1

B.
2

C.
3

D.
4