Verify KMS Encryption NetBackup 7.5
I hope this helps others, I just spent the last 2 weeks searching around trying to find this answer.
Here are steps to verify KMS encryption on tapes with NetBackup 7.5;
Find the jobs on a particular tape you think may be encrypted;
/usr/openv/netbackup/bin/admincmd/bpimmedia -L -mediaid <media name>
get the "Backup-ID" in the first column
/usr/openv/netbackup/bin/admincmd/bpimagelist -backupid <Backup-ID> -L | grep "Flags:"
if tape is encrypted with KMS this will display;
" Flags: 0x40 (Tape Encrypted)"
and if tape is NOT encrypted this will display;
" Flags: 0x0"