Passing Parameters using the EXEC Statement (CTTTPI)

When passing parameters using the EXEC statement, the statement format is

// EXEC CTTTPI,V=volser,[U=unitname|devnum,]F=INIT|MAP|ERAS

where

V – 6-character volume serial number. Valid for INIT, MAP or ERAS functions. Optional.
F – Function to be performed using default control statements. Valid functions:
- INIT – Initialize the tape (reel or cartridge). Create a volume label.
- MAP – Map the tape. Provide information about the contents of a reel or cartridge.
- ERAS – Erase the data on the tape. Write a random pattern from the beginning until the physical end-of-tape.
U – Tape drive to be allocated for use by the utility. Valid values are a generic or esoteric unit name or a specific device number.