tapelabel 		JL0731
dataSource		ganglog		# ganglog, mt, spectro
device			/dev/mt/tps1d6nrnsvc		# tape drive

typedef enum {
        ASTROGANG, 	# GANG files for a single imaging run
        PHOTOGANG,	# GANG files for a single imaging run
	LOG,		# log files for a single imaging night
	SPECTRO,	# all files for a single spectro night
	MT		# all files for a single MT night
} TARCONTENTS;


typedef struct {
   int filemarks;		# number of filemakrs to skip to get here
   int id;			# mjd for logs, run number for gangs
   TARCONTENTS contents;	# GANG, LOG, SPECTRO, MT
} TARFILE; 


tartapelog 0 LOG 51133
tartapelog 1 ASTROGANG 250
tartapelog 2 PHOTOGANG 250
tartapelog 3 ASTROGANG 251
tartapelog 4 PHOTOGANG 251