CMD LABEL Command

LABEL [/MP] [volume] [label]

  drive:          Specifies the drive letter of a drive.
  label           Specifies the label of the volume.
  /MP             Specifies that the volume should be treated as a
                  mount point or volume name.
  volume          Specifies the drive letter (followed by a colon),
                  mount point, or volume name.  If volume name is specified,
                  the /MP flag is unnecessary.