HP Storage Mirroring Software - Manual (Page 483)

Failover Page 482 of 677
After failing over SQL 2008, you may not be able to take the SQL
database offline. If this occurs, stop and restart the SQL Server
Management Studio application, and then you can take the database
offline.
After failing over in a SQL workgroup, you will not be able to connect
to the source server instance of SQL. You can work around this issue
by creating an alias on the target with the source server’s name.
BlackBerry Note: There is a potential to lose BlackBerry instant messages and instant
message contacts when an Exchange mailbox is moved, depending
on the type of BlackBerry hand-held device. You should back up
instant messages through the BlackBerry desktop software or have
the BlackBerry Enterprise server configured to audit all instant
messages through a policy.