A customer has migrated a Microsoft Exchange 2007 server to a Symmetrix V-Max to provide high performance for a critical mailbox database. They have decided to integrate host-based fault tolerance…

A customer has migrated a Microsoft Exchange 2007 server to a Symmetrix V-Max to provide high performance for a critical mailbox database. They have decided to integrate host-based fault tolerance by utilizing Microsoft's native continuous replication technology. Which site-based feature, provided by Exchange to reduce the chance of data loss, will also increase the number of disk reads?