Determines whether short records are to be padded.
    Format
      /PAD  [=[%b]x]
      /NOPAD  (DEFAULT)
    Specifies that the short records are to be padded with either
    ASCII characters (A through Z, a through z, or 0 through 9) or
    numeric values.
    To specify x as a numeric value, you must specify the numeric
    base using the percent symbol (%)  followed by one of the
    following characters:
    D    Indicates that x is a decimal number.
    O    Indicates that x is an octal number.
    X    Indicates that x is a hexadecimal number.
    The numeric value can be any number from 0 to 255.