tapelabel 		JL0893
dataSource		ganglog		# ganglog, mt, spectro
device			/dev/mt/tps0d3nrnsvc		# 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
   TARCONTENTS contents;	# GANG, LOG, SPECTRO, MT
   int id;			# mjd for logs, run number for gangs
} TARFILE; 


tarfile 0 LOG 51140
tarfile 1 ASTROGANG 301
tarfile 2 PHOTOGANG 301
tarfile 3 ASTROGANG 302
tarfile 4 PHOTOGANG 302
tarfile 5 ASTROGANG 303
tarfile 6 PHOTOGANG 303
tarfile 7 ASTROGANG 304
tarfile 8 PHOTOGANG 304
tarfile 9 ASTROGANG 305
tarfile 10 PHOTOGANG 305
tarfile 11 ASTROGANG 306
tarfile 12 PHOTOGANG 306
tarfile 13 ASTROGANG 307
tarfile 14 PHOTOGANG 307
tarfile 15 ASTROGANG 308
tarfile 16 PHOTOGANG 308