Does Microsoft have any guidance concerning implementing personal archiving databases on midline storage? The current calculator does not provide the capability to calculate archive storage on a separate database or server. I am trying to determine the following: Ballpark I/O requirements for a user accessing the personal archive in which a default retention policy is moving data older than three months to their personal archive Log replication requirements: It doesn't seem feesible that the archive is sized based on a 100 messages a day user where the archive will not be receiving and sending e-mail through the course of the day, but actually having minimal user access and when the policy fires to move e-mail from the primary mailbox I would be interested in any comments concerning sizing the storage for capacity and performance with regards to a personal archive on midline storage and also determining log replicaiton requirements if including the archives within a DAG.

A personal archive is an additional mailbox that's enabled for a mailbox user so Total number of mailbox = actual mailboxes + no of mailboxes with personal archive and you use this numer to calculate storage requirements use information here .. http://technet.microsoft.com/en-us/library/ff367907.aspx and http://technet.microsoft.com/en-us/library/ee832790.aspx Dhruv