IEHINITT is a system utility used to place standard volume label sets onto any number of magnetic tapes mounted on one or more tape units. Many larger z/OS® installations do not allow unlabeled tapes to be brought into the installation.

The tape labels can be ISO/ANSI Version 3 or ISO/ANSI Version 4 volume label sets written in ASCII (American Standard Code for Information Interchange) or IBM® standard labels written in EBCDIC.

IEHINITT is an APF-authorized program, which means that if another program calls IEHINITT, that program must also be APF-authorized. To protect system integrity, the calling program must follow the sytem integrity requirements described in z/OS MVS™ Programming: Authorized Assembler Services Guide.

Because IEHINITT can overwrite previously labeled tapes regardless of expiration date and security protection, IBM recommends that the security administrator use PROGRAM protection as noted in z/OS DFSMSdfp™ Utilities.