installboot —
install a bootstrap on a UFS disk
  
    | /usr/mdec/installboot | -n|-vufsboot bootxx
      rawdev | 
installboot is used to install a "first-stage"
  boot program into the boot area of a UFS disk partition, and initialize the
  table of block numbers the bootxx program uses to load
  the second-stage boot program.
The options are as follows:
  - -n
- Do not actually write anything on the disk.
- -v
- Be verbose, printing out the block numbers that
      bootxx will use to load
      ufsboot.
The arguments are:
  - ufsboot
- the name of the second-stage boot program in the file system where the
      first-stage boot program is to be installed.
- bootxx
- the name of the prototype file for the first stage boot program.
- rawdev
- the name of the raw device in which the first-stage boot program is to be
      installed. This should correspond to the block device on which the file
      system containing ufsboot is mounted.
installboot requires simultaneous access to the mounted
  file system and the raw device, but that is not allowed with the kernel
  securelevel variable set to a value greater than zero
  (the default), so installboot only works in
  single-user mode (or insecure mode - see
  init(8)).