tapelabel 		JL0664
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; 


TARFILE 0 LOG 51115
TARFILE 1 ASTROGANG 205
TARFILE 2 PHOTOGANG 205
TARFILE 3 ASTROGANG 206
TARFILE 4 PHOTOGANG 206
TARFILE 5 ASTROGANG 207
TARFILE 6 PHOTOGANG 207
TARFILE 7 ASTROGANG 208
TARFILE 8 PHOTOGANG 208
TARFILE 9 ASTROGANG 209
TARFILE 10 PHOTOGANG 209
TARFILE 11 ASTROGANG 210
TARFILE 12 PHOTOGANG 210
TARFILE 13 ASTROGANG 211
TARFILE 14 PHOTOGANG 211
TARFILE 15 ASTROGANG 212
TARFILE 16 PHOTOGANG 212
TARFILE 17 ASTROGANG 215
TARFILE 18 PHOTOGANG 215