I have a Microsoft Windows Server 2003 running Exchange 2003 and SnapManager for Exchange. The logs, databases, etc, etc, are on the netapp.
I want to upgrade the server to Windows Server 2008, but I'm not sure that the Netapp software will survive the upgrade. So I'd like to move the exchange data back to the local drive, upgrade to exchange 2010, upgrade the OS to server 2008, and then see what I can do with the netapp software.
Exchange 2003 is the last version of Exchange to support in-place upgrades (from 2003). From 2007 and on, you will need to bring in new servers parallel to your 2003 environment and perform a user migration.
The architecture of Exchange 2003 and 2007 and 2010 can be radically different. I would encourage you to read as much as possible before attempting anything.