1### Old Bacula volume
212	string		BB01		old Bacula volume data,
3>20	bedate		x		session time %s
4
5### Current Bacula volume
612	string		BB02		Bacula volume data,
7>20	bedate		x		session time %s,
8>24	belong		-1		PRE_LABEL,
9>24	belong		-2		VOL_LABEL,
10>>57	belong		x		version %d,
11>>93	string		x		name '%s'
12