If the clustered file system, clustered storage system, storage virtualization movement is new to you then this is a good intro paper. It's a both vendor puff piece and informative, so it might be worth your time.
A Quick Hit of What's Inside
Clustered storage architectures have the ability to pull together two or more storage devices to behave as a single entity. Clustered storage can be broken down into three types:
- 2-way simple failover clustering
- Namespace aggregation
- Clustered storage with a distributed file systems (DFS)