reboot.tproj/boot_hp300.8

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  36 .\"     @(#)boot_hp300.8        8.2 (Berkeley) 4/19/94
  37 .\"
  38 .Dd April 19, 1994
  39 .Dt BOOT_HP300 8 hp300
  40 .Os
  41 .Sh NAME
  42 .Nm boot
  43 .Nd
  44 system bootstrapping procedures
  45 .Sh DESCRIPTION
  46 .Sy Power fail and crash recovery.
  47 Normally, the system will reboot itself at power-up or after crashes.
  48 An automatic consistency check of the file systems will be performed,
  49 and unless this fails, the system will resume multi-user operations.
  50 .Pp
  51 .Sy Cold starts.
  52 On an HP300, the boot procedure uses the boot ROM to load a boot program
  53 from an
  54 .Tn LIF
  55 format directory at the beginning of an attached disk.
  56 The
  57 .Pa /usr/mdec
  58 directory contains a disk boot programs which should be placed in a
  59 new pack automatically by
  60 .Xr newfs 8
  61 when the ``a'' partition file system on the pack is created.
  62 .Pp
  63 This
  64 .Em boot
  65 program
  66 finds the corresponding file on the given device
  67 .Pf ( Ar vmunix
  68 by default),
  69 loads that file into memory,
  70 and starts the program at the entry address specified in the program header.
  71 .Pp
  72 The boot program can be interrupted by typing `^C' (ctrl-C).
  73 This will force the boot program to interactively prompt for a system to boot.
  74 If not interrupted, it will boot from the device from which the boot
  75 program itself was loaded.
  76 .Pp
  77 The file specifications used for an interactive boot are of the form:
  78 .Pp
  79 .Dl device(unit, minor)
  80 .Pp
  81 where
  82 .Ar device
  83 is the type of the device to be searched,
  84 .Ar unit
  85 is 8 * the hpib number plus the unit number of the disk or tape,
  86 and
  87 .Ar minor
  88 is the disk partition or tape file number.
  89 Normal line editing characters can be used when typing the file specification.
  90 Currently, ``rd'' and ``sd'' are the only valid
  91 .Ar device
  92 specifiers.
  93 .Pp
  94 For example,
  95 to boot from the `a' file system of unit 0 on HP-IB 2,
  96 type
  97 .Ql rd(16, 0)vmunix
  98 to the boot prompt.
  99 For tapes, the minor device number gives a file offset.
 100 .Pp
 101 In an emergency, the bootstrap methods described in the paper
 102 .%T Installing 4.3bsd on the HP300
 103 can be used to boot from a distribution tape.
 104 .Sh FILES
 105 .Bl -tag -width /usr/mdec/installboot -compact
 106 .It Pa /vmunix
 107 system code
 108 .It Pa /usr/mdec/bootrd
 109 .Tn LIF
 110 format boot block
 111 .It Pa /usr/mdec/installboot
 112 program to install boot blocks
 113 .El
 114 .Sh SEE ALSO
 115 .Xr halt 8 ,
 116 .Xr reboot 8 ,
 117 .Xr shutdown 8