/LABEL=volume-label

    Specifies a 1- to 12-character ANSI name to be encoded on the
    volume. The specified label remains in effect until it is changed
    explicitly; dismounting the volume does not affect the label. HP
    strongly recommends that a volume label should consist of only
    alphanumeric characters, dollar signs ($),  underscores (_), and
    hyphens (-).

                                   NOTE

       Changing the volume label does not change other structures
       that used the original volume label. For example, the
       DISK$label logical volume name is not changed nor is the
       device-lock name that is kept internally by OpenVMS. As a
       result, if you attempt to access another disk that has the
       same volume label as the original volume of this device,
       you may get error messages such as the following: "%MOUNT-F-
       VOLALRMNT, another volume of same label already mounted".

       HP recommends that, if you change a disk volume label,
       you also dismount and remount the disk on all nodes in the
       cluster so that the names and locks are consistent.

    If you change the volume label on a nonsystem disk and the
    PRODUCT INSTALL command has been used to install software
    products on that disk, you must update the software product
    database to reflect this change. To accomplish this, first
    dismount and remount the disk. Then use the PRODUCT REGISTER
    VOLUME command to replace all occurrences of the old DISK$label
    with the new logical volume name that was created by the MOUNT
    command.

                                   NOTE

       You do not need to take this action when you change
       the label of the system disk. The POLYCENTER Software
       Installation Utility continues to use the old logical
       volume name until the system is rebooted. After reboot (when
       the system disk is remounted), the utility automatically
       identifies the system disk using its new logical volume
       name.