Upgrading to a SQL Server 2005 Failover Cluster
SQL Server 2005 supports upgrade of the Database Engine and Analysis Services. For more information on upgrade support, see Upgrading to SQL Server 2005 and Version and Edition Upgrades.
See Also
Tasks
How to: Upgrade to a SQL Server 2005 Failover Cluster Instance (Setup)
Other Resources
Version and Edition Upgrades
Upgrading to SQL Server 2005
Preparing to Install SQL Server 2005