Command: vol
  VOL displays the disk volume label and serial number, if it exists.
Syntax:
  VOL [drive]
  VOL [/?]
      drive  Specifies the drive letter to display the volume
             label, e.g. C: and the serial number
Options:
  /?  Shows the help.
Comments:
  Each drive letter can have an own volume label. You can create it
  with LABEL and FORMAT drive /V:LABELNAME. The name cannot be longer
  than 11 characters.
  The serial number is shown by DIR and LABEL independent
  if the drive has a label set.
  VOL is a command internal to command.com and needs no other file
  in order to work.
Examples:
  To obtain a partition:
  fdisk                Follow instructions. Option 4 shows the volume
                       label (when there already exists one)
  format c: /V:DRV_C   Formats drive C: and gives the label DRV_C
  label c:             Shows drive C: and its label DRV_C and asks if
                       you want to create a new label
  vol c:               Shows drive C: and its label DRV_C or a new one
                       created by format or label
See also:
  command.com/freecom
  dir
  fdisk
  format
  label
  Copyright © 2004 Robert Platt, updated 2011 and 2022 by W. Spiegl.
  This file is derived from the FreeDOS Spec Command HOWTO.
  See the file H2Cpying for copying conditions.