Data Protection Manager (DPM) depends on several other Windows services to function properly, some of which use still other Windows services to do their jobs. Occasionally all those services can conflict.
One case of conflict arises when you use DPM to protect Windows Storage Server and you want to enable Web sharing. If you try to install it with the default settings, you will get an error message saying the Default Web Site is disabled and SQL Server Reporting Services cannot be installed. It also suggests running inetmgr.exe from the command line, then trying to enable the Default Web Site again.
However, doing that doesn't fix the problem.
What's going on? Port conflict. Windows Storage Server uses Port 80 as the default for Web sharing. However, DPM relies on SQL Server Reporting Services for reporting. SQL Server Reporting Services uses Internet Information Server (IIS) and IIS also uses Port 80. DPM's installation software detects the conflict during the prerequisite check and issues an error message.
Once you understand what is going on, the solution is straightforward. When you want to enable Web sharing for DPM on a computer running Windows Storage Server, you must configure Web sharing in Windows Storage Server to use a different port, then start the default Web site.
About the author: Rick Cook specializes in writing about issues related to storage and storage management.
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