We're planning to upgrade the two server boxes in our existing SQL 2005 SP2 failover cluster. The system databases and user databases are all on an attached SAN storage device. Our network admin, who runs the cluster administrator software, believes the existing configuration will be detected when new boxes with fresh sql 2005 installs are added. I'm skeptical it will be that simple. What we should do is create a test environment with a cluster arrangement and try it there, but that may not happen. One of the first potential problems that comes to mind is that a default install of sql will expect system databases on the local C drive, which isn't the case here.
Has anyone done such an upgrade? If so, what issues did you discover?