Can't backup logical logs to /dev/null

Went through all the logical log backup recommendations and alot said to do automatic/continuous backup to /dev/null. Logs were full at first so I added another logical log. Now when I try it I get a message saying I can't backup logs to /dev/null: Taz:/home/archive/informix/etc$ ontape -a Performing automatic backup of logical logs. Please mount tape 1 on /dev/null and press Return to continue ... Logbackup failed - Log backup to device /dev/null not allowed Please label this tape as number 1 in the log tape sequence. This tape contains the following logical logs: 1 (partial) Program over. -- Jason C. Bodnar jason@cimedia.com Internet Programmer Cox Interactive Media