tapelabel 		JL3907
dataSource		ganglog		# ganglog, mt, spectro
device			/dev/mt/tps3d6nrnsvc		# 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
	MT,		# all files for a single MT night
	SPECTRO,	# all files for a single spectro night
	TPM		# all TPM files for a single 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 1 LOG 52016
tarfile 2 ASTROGANG 2255
tarfile 3 PHOTOGANG 2255
tarfile 4 ASTROGANG 2256
tarfile 5 PHOTOGANG 2256
tarfile 6 ASTROGANG 2257
tarfile 7 PHOTOGANG 2257
tarfile 8 ASTROGANG 2258
tarfile 9 PHOTOGANG 2258
tarfile 10 ASTROGANG 2259
tarfile 11 PHOTOGANG 2259
tarfile 12 TPM 52016