A volume label is an identification string encoded on a volume.
For a disk volume, you can specify a maximum of 12 ANSI characters; for a magnetic tape volume, you can specify a maximum of 6 alphanumeric characters. Letters are automatically changed to uppercase. VSI strongly recommends that a disk volume label should only consist of alphanumeric characters, dollar signs ($), underscores (_), and hyphens (-). To use ANSI "a" characters (! " % ' ( ) * + , - . / : ; < = > ?) on the volume label on maagnetic tape, you must enclose the volume name in quotation marks.
Creating and Modifying Labels
The first time a label is encoded on a volume when it is initialized. It can be later changed with the SET VOLUME/LABEL command.
The volume label is checked by default when the volume is mounted. You can override label checks by specifying /OVERRIDE=IDENTIFICATION on the MOUNT command, but you need to have VOLPRO or the UIC of the volume's owner to do that.