Use any tape in drive

Hallo,

I want arkeia to do daily full backups just with the tape which is in the drive. The data on the drive should be earsed before the backup. If possible it should be locked for 7 days after use. I found a page in the wiki: http://wiki.arkeia.com/index.php/Force_Tape_Usage but can not find where to set this.

Can you help me?