The conventional way of planning for Exchange Server storage is to throw a lot of disk storage at the server and hope that is sufficient. Mail storage requirements continue to grow for even average users; these users place more and more capacity requirements not only on disk storage but also on disk I/O capacity. As current capacity requirements are exceeded, the storage system must provide scalability. The Shortcut Guide to Exchange Server 2007 Storage Systems, authored by Microsoft Exchange MVP Jim McBee, covers Exchange Server storage capacity requirement planning, the basics of using iSCSI SANs, and best practices for scalability and SAN operations.