The f_setlabel function sets/removes the label of a volume.
FRESULT f_setlabel ( const TCHAR* label /* [IN] Volume label to be set */ );
FR_OK, FR_DISK_ERR, FR_INT_ERR, FR_NOT_READY, FR_INVALID_NAME, FR_WRITE_PROTECTED, FR_INVALID_DRIVE, FR_NOT_ENABLED, FR_NO_FILESYSTEM, FR_TIMEOUT
When the string has a drive number, the volume label will be set to the volume specified by the drive number. If not, the label will be set to the default drive. If the given string is a null-string, the volume label on the volume will be removed. The format of the volume label is similar to the short file name but there are some differences shown below:
Available when _FS_READONLY == 0 and _USE_LABEL == 1.
/* Set volume label to the default drive */
f_setlabel("DATA DISK");
/* Set volume label to the drive 2 */
f_setlabel("2:DISK 3 OF 4");
/* Remove volume label of the drive 2 */
f_setlabel("2:");