VTL drives are not scanned completely after a reboot

Hi,

I have Netbackup Master server running on RHEL Linux. We have a NetApp VTL configured for taking backups. After the Server is rebooted, only few drives are able to get scanned and visible from OS end. We have to forcefully scanned all the drives again.

I want to know if there is any setting from OS end or VTL side through which all the drives get scanned after every reboot.

Regards

Vishal Dave