Getting Help on the format Utility
The format utility provides a help facility that you can use whenever
the format utility is expecting input. You can request help about what input
is expected by typing a question mark (?). The format utility displays
a brief description of what type of input is needed.
If you type a ? at a menu prompt, a list of
available commands is displayed.
The man pages associated with the format utility include the following:
format(1M) – Describes the basic format utility capabilities and provides descriptions of all command-line variables.
format.dat(4) – Describes disk drive configuration information for the format utility.