Other file header labels (HDR3 - HDR9, EOF3 - EOF9, EOV3 - EOV9) and user volume labels (UVL1 - UVL9) and volume labels (VOL2 - VOL9) are not created by the operating system. Because these labels may appear on magnetic tapes created by other systems, the operating system will accept them as input. Those labels are ignored during label processing and are not placed on output tapes. Ignored labels are checked only for a valid label identifier and proper label sequence; no checks are made for ignored labels encountered during positioning to the requested data set.

Figure 1 shows a hypothetical input tape from a non-IBM system and a corresponding output tape produced by the operating system. The user volume label, the additional header label, and the additional trailer label are not placed on the output tape.

Figure 1. Example of a ISO/ANSI tape from a non-IBM system and a corresponding output tape