We are trying to setup a failover environment in our office for disaster recovery or hardware problems.
Currenlty we have one SBS 2003 unit which is the DC and runs Exchange (In the process of migrating to EBS or SBS 2008), two server standard 2003 (one runs SQL and a few apps, and the other is file storage), and one server 2008 Standard running terminal services.
I know that in order to setup a cluster we have to upgrade all of our servers to Datacenter or Enterprise, and have identical hardware on the units (which we don't have).
What will be the most cost-effective way of achieving this?
Will DFS work?
I've also read about Double-Take, and was wondering about Hyper-V or VMware.
Your input is appreciated.