A Guide for Using Mtools:
Man Pages
NAME
mlabel - make an MSDOS volume label
SYNOPSIS
mlabel [ -v ] drive:
DESCRIPTION
Mlabel displays the current volume label, if present, and
prompts the user for a new volume label. To delete an
existing volume label, press return at the prompt.
Mlabel will allow the following command line option:
v Verbose mode. Display the new volume label if the
label supplied is invalid.
Reasonable care is taken to create a valid MSDOS volume
label. If an invalid label is specified, mlabel will change
the label (and display the new label if the verbose mode is
set).
Mlabel returns 0 on success or 1 on failure.
SEE ALSO
mformat(1)