Windows Removable Storage Manager Service
If you are using the Windows native backup application (NTBackup), then it will be necessary to start the Removable Storage Manager service.
If you are not using the Windows native backup application, refer to your application’s installation instructions to check whether or not the Removable Storage Manager service should be disabled. In most cases it is best to disable the RSM service. While RSM is running, it may send commands to control the library and tape drive if device drivers are loaded. This may cause conflicts and failures with your backup application.
To disable the RSM service, click on the Windows Start button, Settings, Control Panel. In Control Panel double-click on Administrative Tools. In Administrative Tools, double-click on the Services icon. In Services, scroll down to find the Removable Storage service. Double-click to open its properties. Stop the service and then set Startup type to Disabled.