When I Try To Backup Files On A Tape Drive Through NTBackup (The Default Win2K Backup App) I Get An Error Messsage: "Required Media Missing. There is no unused media available with the selected type. Add unused media or click Cancel to select another type. Note: It may take up to 60 seconds for Removable Storage to recognize new media"
It's A Win2K Server With SP4 The Tape Drive Is "Seagate DAT 9SP40-000 SCSI" And I'm Using A New Out-Of-The-Wrapper 4mm 150M DDS-4 Imation Corp Tape, I Gave The Drive A Few Minutes And Tried Again But I Always Get The Same Error Message.

What Might Be The Problem?

Thanks In Advance...

Here's an article on How to schedule unattended backups using a stand-alone tape library you should read. Go through the process described here for preparing the tape.

My personal preference is an unmanaged backup set as it doesn't require labeled tapes. However, to add the /um switch I've always found it best to copy the command into a batchfile and add it there. Then schedule the batchfile to run.