Hey, I run Blackboard level 1, version 5.5 on Windows 2000. If you do not know anything about Blackboard, contact your account rep with Blackboard. Have the technical contact on your contract updated to you. Then, get a login for the blackboard support website. You can download all documentation from there.
Under 2k/IIS, you're running SQL 7 or 2k. The content that you need to backup is the SQL server database, named bb50, which is in your Blackboard\Data\ folder. You will need to setup backups through SQL Server, and have it place the backup databases in a shared folder that is accessible by the server that has the tape backup. If the tape backup is on the blackboard server, simply back up the SQL server backup folder.