This has to be updated. The structure has changed. It follows a simple rule that the archives are backed-up sequentially from the first to the last one.
TAPE 1 /pulsar/archive00 with exception of S70_TAPES directory, and /pulsar/archive01/PT_TAPES/PT0204
TAPE 2 /pulsar/archive01 with exception of PT0204 directory (which only fit partially)
TAPE 3 /pulsar/archive02
TAPE 4 /pulsar/archive06 and /pulsar/archive00/S70_TAPES
TAPE 5 /pulsar/archive05
TAPE 6 /pulsar/archive04 and PT0258, PT0259, PT0261, PT0262, PT0263 from /pulsar/archive08
TAPE 7 /pulsar/archive08 with exception of directories PT0258, PT0259, PT0261, PT0262 and PT0263
TAPE 8 /pulsar/archive09 and all /psr disks
TAPE 9 /pulsar/archive11 with exception of PT0288, PT0289, PT0290, PTC233, PTC234 and PTC235 directories
TAPE 10 /pulsar/archive07 and PT0288, PT0289, PT0290, PTC233, PTC234 and PTC235 directories
TAPE 11 /pulsar/archive10/CPSR2 part1
TAPE 12 /pulsar/archive10/CPSR2 part2
TAPE 13 /pulsar/archive12
TAPE 14 /pulsar/archive13
Each DLT S4 backup tape usually contain a number of tape files. The list of all files in each tape file is stored and named with a following convention: tape[tape number].xx, where xx is a number of a tape file. For example tape1.00 means the first tape file on tape1, tape1.01 is the second tape files on tape1 etc. All the index files are stored in the directory /pulsar/psr/backup, for which the backup copy is created daily.