Your network contains an Active Directory domain.
The domain contains 20 member servers.
The domain contains have two servers named Server1 and Server2 that run Windows Server 2008 R2.
You connect Server1 and Server2 to a logical unit number (LUN) on a Storage Area Network (SAN).
You create a failover cluster named Cluster1. You add Server1 and Server2 as nodes to Cluster1.
You discover that there are no cluster disks available for a new clustered file server service on Cluster1.
You need to ensure that you can add a clustered file server service to Cluster1.
What should you do?