tapelabel 		JL0802
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 51136
TARFILE 1 ASTROGANG 267
TARFILE 2 PHOTOGANG 267
TARFILE 3 ASTROGANG 269
TARFILE 4 PHOTOGANG 269
TARFILE 5 ASTROGANG 270
TARFILE 6 PHOTOGANG 270
TARFILE 7 ASTROGANG 271
TARFILE 8 PHOTOGANG 271
TARFILE 9 ASTROGANG 272
TARFILE 10 PHOTOGANG 272
TARFILE 11 ASTROGANG 273
TARFILE 12 PHOTOGANG 273
TARFILE 13 ASTROGANG 274
TARFILE 14 PHOTOGANG 274