-V volid
          Specifies the volume ID (volume name or  label)  to  be  written
          into  the  master  block.   There  is  space  for 32 characters.
          Equivalent to VOLI in the .genisoimagerc file.  The volume ID is
          used  as  the mount point by the Solaris volume manager and as a
          label assigned to a disc on various other platforms such as Win‐
          dows and Apple Mac OS.