update <sectors> {verbose|quiet}
   Perform the update operation on the given sectors. Other commands that
need to change a sector will do an update too. Order of access is from
top-to-bottom, left-to-right. This can affect how you want to set up
deliveries, since this is when they are done. Setting the 'verbose' option
will supply more messages than you would normally get about the
updating, while 'quiet' will suppress nearly all update messages.