Reset LTO Tape:
sudo dd if=/dev/zero of=/dev/nst0 bs=512 count=1

Remove all file entries from Volume = Tape
purge volume=Full-0022

Remove Volume:
delete volume=Full-0022

name a tape:
label storage=LTO7 name=Full-new

rename Tape:
relabel storage=LTO7 oldvolume=Full-0022 volume=Full-new

Backup Bareos DB:
sudo -u postgres pg_dump bareos > bareos_backup.sql

RESET Bareos DB:
/usr/lib/bareos/scripts/drop_bareos_database
/usr/lib/bareos/scripts/create_bareos_database
/usr/lib/bareos/scripts/make_bareos_tables
/usr/lib/bareos/scripts/grant_bareos_privileges