To applications like Exchange, this grafting is
Figure 12-2
Part III: Working with PowerShell in a Production Environment
332
completely transparent ??” it appears as one volume. Using mount points has several advantages. One is
that there is a 26 drive OS limitation. On a fully loaded Exchange Server 2007 computer with 50 storage
groups, there would not be enough drive letters to have each disk volume assigned a drive letter. Mount
points reduce the number of drive letters needed because of the reasons discussed earlier. Another
benefit to using mount points is that it gives a lot of flexibility during a recovery scenario because it is
possible to replace the failed disk volume by grafting the LCR copy disk volume in its place.
Do not enable LCR for the storage group that contains the public folder database if more than one public
folder server exists in the organization. Public folders are always replicating content and hierarchy
information. If there is a failover, an item originated on the failed node would exist on the other public
folder servers. To prevent this situation, if there is an unscheduled failover the public folder server will
not mount until the original database is brought back online. If a log was lost, the database will not
mount to prevent data integrity issues.
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