boot(8) - NetBSD Manual Pages

BOOT(8)               NetBSD/sun3 System Manager's Manual              BOOT(8)


NAME

     boot -- system bootstrapping procedures


DESCRIPTION

   Power fail and crash recovery
     Normally, the system will reboot itself at power-up or after crashes.  An
     automatic consistency check of the file systems will be performed as
     described in fsck(8), and unless this fails, the system will resume
     multi-user operations.

   Cold starts
     A disk-boot program (/usr/mdec/ufsboot) will attempt to load netbsd from
     partition A of the boot device, which must currently be an ``sd'' disk.
     Alternatively, network boot program (/usr/mdec/netboot) will load netbsd
     from the NFS root as determined by the procedure described in
     diskless(8).

   Boot program options
     -a   Prompt for the root file system device, the system crash dump
          device, and the path to init(8).

     -d   Bring the system up in debug mode.  Here it waits for a kernel
          debugger connect; see ddb(4).

     -q   Boot the system in quiet mode.

     -s   Bring the system up in single-user mode.

     -v   Boot the system in verbose mode.

     Any extra flags or arguments, or the <boot string> after the -- separator
     are passed to the boot PROM.  Other flags are currently ignored.

     At any time you can break back to the ROM by pressing the `L1' and `a'
     keys at the same time (if the console is a serial port the same is
     achieved by sending a `break').  If you do this accidentally you can con-
     tinue whatever was in progress by typing `c' followed by the return key.


FILES

     /netbsd                system code
     /usr/mdec/bootxx       first-level boot block for disks
     /usr/mdec/netboot      boot program for NFS (diskless) boot
     /usr/mdec/ufsboot      second-level boot program for UFS disks
     /usr/mdec/installboot  program to install bootxx on a disk


SEE ALSO

     disklabel(8), fsck(8), halt(8), init(8), rc(8), shutdown(8), syslogd(8)

NetBSD 9.1                       April 8, 2003                      NetBSD 9.1