Symptom:
How to go back to Tape Alert after setting up frequency-based cleaning on robotic drives
 
Solution:
Many drives support Tape Alert, which signals when the drive needs cleaning. VERITAS NetBackup (tm) then mounts a cleaning tape and cleans the drive. If a tape drive has been set to clean after a specific number of hours, NetBackup will mount a cleaning tape at the specified frequency, regardless of whether or not a Tape Alert has been sent.

If you wish to stop using frequency-based cleaning and strictly rely on Tape Alert, simply set the frequency to 0 (zero) hours. NetBackup will then stop using frequency-based cleaning and will instead use Tape Alert if the drive supports it.

There is no option in NetBackup to use Tape Alert; NetBackup will always use Tape Alert if it is supported by the hardware.