Volume label

The IBM standard volume label (VOL1) appears at the beginning of each tape. The volume label identifies the volume and its owner and is used to verify that the correct volume is mounted.

Volume labels are created by the EDGINERS or IEHINITT utility programs, or by input from the operator during the Open or EOV routine when:

A label conflict is detected (a label conflict occurs when the type of label requested differs from the type of label read at load point from the mounted volume)
The first block of a volume cannot be read (except a RACF-protected volume is rejected if failure to read was because the tape format, such as a nonsupported density, was not recognizable by the control unit)

For additional information about EDGINERS and the IEHINITT utility programs, see z/OS DFSMSrmm Implementation and Customization Guide and z/OS DFSMSdfp Utilities.