What are Storage Groups, and what is the relationship between them and multiple databases?
A Storage Group is a virtual container for multiple databases (information stores). The recommendation for database capacity planning on non-clustered Exchange 2000 Servers is a maximum of four storage groups that contain a maximum of five databases for each storage group. This results in a maximum of 20 databases for each Exchange 2000 server. This limit is enforced inside the Exchange System Manger snap-in, so administrators cannot create more storage groups than the system enables. See XADM: Maximum Number of Storage Groups in Exchange 2000 for Database Capacity Planning 251123 for details.
