Microsoft Knowledge Base Article 235469 contains the following summary:

This article describes how to restore the Remote Storage Service (RSS) database. This may be useful if:
It is necessary to completely re-install Windows 2000. After you do so, you must restore the RSS database files before you can recall files from off-line storage.
The RSS database is damaged.
When you try to obtain access to a file in off-line storage when the RSS service is not installed or able to start, you may receive the following error message:
path and file name The file cannot be accessed by the system.