Link: http://support.microsoft.com/kb/927797
When you use a universal serial bus (USB-based tape drive as a backup device on a computer that is running Microsoft SQL Server 2000 or Microsoft SQL Server 2005, you cannot specify the USB-based tape drive as a backup device in SQL Enterprise Manager or in SQL Server Management Studio.
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IIS Feature Requirement Warning Message on SQL Server 2005 Setup
Warning message on the System Configuration Check during SQL Server 2005 Setup
If you receive a warning message for the IIS Feature Requirement item on the System Configuration Check page during the SQL Server 2005 installation on Windows Vista/Windows Server Longhorn, chances are you did not install all the IIS 7 role services that SQL Server depends on. Here is the list of IIS 7 role services that need to be installed:
Static Content
Default Document
HTTP Redirection
Directory Browsing
ASP.Net
ISAPI Extension
ISAPI Filters
Windows Authentication (Not available on Windows Vista Basic/Premium)
IIS Metabase
IIS 6 WMI