Extension=Disable
    Extension=Enable

    Allows you to change the automatic file extension attribute when
    you move a storage area.

    Use the Extension=Disable qualifier to disable automatic file
    extensions for one or more storage areas.

    Use the Extension=Enable qualifier to enable automatic file
    extensions for one or more storage areas.

    If you do not specify the Extension=Disable or the
    Extension=Enable qualifier, the storage areas is moved with the
    automatic file extension attributes that are currently in effect.

    The Extension qualifier is a positional qualifier.