boot(8) - NetBSD Manual Pages

BOOT(8)             NetBSD/mvme68k 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 from disk
     The disk-boot program (/usr/mdec/bootsd) will attempt to load netbsd from
     partition A of the boot device, which must currently be an ``sd'' disk.

   Cold starts from tape
     The tape-boot program (/usr/mdec/bootst) will attempt to load netbsd from
     a SCSI tape drive.

   Cold starts over a network
     The network boot program (/usr/mdec/netboot) will load netbsd from the
     NFS root as determined by the procedure described in diskless(8).  Note
     that the MVME147 is unable to boot directly from the network without the
     help of a small bootloader program (/usr/mdec/sboot).

   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 to the kernel debugger ddb(4) (assuming options
     DDB was specified in the kernel configuration file) by sending a serial
     line BREAK character.  If you do this accidentally you can continue what-
     ever 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/stboot       first-level boot block for tapes
     /usr/mdec/bootsd       second-level boot block for UFS disks
     /usr/mdec/bootst       second-level boot block for tapes
     /usr/mdec/netboot      boot program for NFS (diskless) boot
     /usr/mdec/sboot        network bootstrap program for MVME147
     /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 9.0                       April 8, 2003                      NetBSD 9.0