Backups using ONTAPE

Would be interested in how you have your backups setup. I'd like to run ontape in a cron job, and have ontape -c backup logical logs continuously to another disk drive which gets dumped (via unix dump) nightly. This will allow me to to simply change tapes each morning and that's that. (well perhaps a second cron to copy the log backup file to log.date nightly as well). The question I have then is, can you run ontape without it prompting for manual interaction - eg prompt saying "Please insert tape.." Would be interested in knowing how others are automating this task. Second question, ontape for a warm restore is giving a 155 error waying "Primary and Mirror chunks are bad". A full cold restore seems to work fine, but not warm. Any ideas? Thanks, John Postma john@mks.com