diff options
author | rnordier <rnordier@FreeBSD.org> | 1999-01-19 09:04:18 +0000 |
---|---|---|
committer | rnordier <rnordier@FreeBSD.org> | 1999-01-19 09:04:18 +0000 |
commit | 5cb5bccf75037af591ea3230c29682e166a34fe9 (patch) | |
tree | 35764eba9f0369514016fee65fd156dc4d784287 /sbin/reboot/boot_i386.8 | |
parent | 475c80e993d114855ff6e4068efdfa72a64af73f (diff) | |
download | FreeBSD-src-5cb5bccf75037af591ea3230c29682e166a34fe9.zip FreeBSD-src-5cb5bccf75037af591ea3230c29682e166a34fe9.tar.gz |
Make some further revisions to the boot documentation.
Diffstat (limited to 'sbin/reboot/boot_i386.8')
-rw-r--r-- | sbin/reboot/boot_i386.8 | 44 |
1 files changed, 16 insertions, 28 deletions
diff --git a/sbin/reboot/boot_i386.8 b/sbin/reboot/boot_i386.8 index c8cac5b..ea2d997 100644 --- a/sbin/reboot/boot_i386.8 +++ b/sbin/reboot/boot_i386.8 @@ -36,7 +36,7 @@ .\" .\" @(#)boot_i386.8 8.2 (Berkeley) 4/19/94 .\" -.\" $Id: boot_i386.8,v 1.14 1998/09/23 06:54:14 yokota Exp $ +.\" $Id: boot_i386.8,v 1.15 1999/01/06 14:19:09 rnordier Exp $ .\" .Dd April 19, 1994 .Dt BOOT 8 i386 @@ -52,23 +52,19 @@ An automatic consistency check of the file systems will be performed, and unless this fails, the system will resume multi-user operations. .Pp .Sy Cold starts. -Most 386 -.Tn "PC AT" -clones attempt to boot the floppy disk drive 0 (otherwise known as -drive A:) first, and failing that, attempt to boot the hard disk -drive 0 (otherwise known as drive C:, -or (confusingly) hard disk drive 1, or drive 0x80 in the BIOS). -Some BIOSes let you change this default sequence or may include a CD-ROM +Most i386 PCs attempt to boot first from floppy disk drive 0 (sometimes +known as drive A:) and, failing that, from hard disk drive 0 (sometimes +known as drive C:, or as drive 0x80 to the BIOS). Some BIOSes allow +you to change this default sequence, and may also include a CD-ROM drive as a boot device. .Pp By default, a three-stage bootstrap is employed, and control is automatically passed from the boot blocks (bootstrap stages one and two) to a separate third-stage bootstrap program, .Pa /boot/loader . -This third stage provides considerably more sophisticated control -over the booting process than it is possible to achieve in the boot -blocks, which are constrained by occupying limited fixed space on a -given disk or slice. +This third stage provides more sophisticated control over the booting +process than it is possible to achieve in the boot blocks, which are +constrained by occupying limited fixed space on a given disk or slice. .Pp However, it is possible to dispense with the third stage altogether, either by specifying a kernel name in the boot block parameter @@ -87,7 +83,7 @@ third stage cannot be loaded. .Pp The remainder of this subsection deals only with the boot blocks. At present, documentation of the third stage is chiefly -available though online help in the +available through online help in the .Pa /boot/loader program itself. .Pp @@ -96,12 +92,9 @@ you should see a prompt similar to the following: .Bd -literal >> FreeBSD/i386 BOOT Default: 0:wd(0,a)/kernel - boot: .Ed .Pp -(You may see some tips printed on the screen too.) -.Pp The automatic boot will attempt to load .Pa /kernel from partition @@ -118,7 +111,8 @@ boot device, as a hint about available boot files. (A .Dv \&? may also be specified as the last segment of a path, in which case the listing will be of the relevant subdirectory.) -.It Op bios_drive:interface(unit,part) Op filename Op Fl aCcDdghPrsv +.Pp +.It bios_drive:interface(unit,part) filename Op Fl aCcDdghPrsv Specify boot file and flags. .Bl -tag -width 10x -compact .It bios_drive @@ -152,7 +146,7 @@ By convention, only partition contains a bootable image. If sliced disks are used .Pq Dq fdisk partitions , any slice can be booted from, with the default being the active slice -or, otherwise, the first slice. +or, otherwise, the first FreeBSD slice. .It filename The pathname of the file to boot (relative to the root directory on the specified partition). Defaults to @@ -227,22 +221,15 @@ be verbose during device probing (and later). .El .Pp You may put a BIOS drive number, a controller type, a unit number, -a partition, a kernel file name and the -.Fl D, -.Fl h -or -.Fl P -options in +a partition, a kernel file name, and any valid option in .Pa /boot.config -to set defaults. Write them in one line just as you type at the +to set defaults. Enter them in one line just as you type at the .Ql boot: prompt. .Sh FILES .Bl -tag -width /kernel.old.config -compact .It Pa /boot.config parameters for the boot blocks (optional) -.It Pa /boot.help -help messages (optional) .It Pa /boot/loader third-stage bootstrap .It Pa /kernel @@ -253,6 +240,7 @@ typical non-default kernel (optional) .Sh SEE ALSO .Xr ddb 4 , .Xr ttys 5 , +.Xr btxld 8 , .Xr config 8 , .Xr disklabel 8 , .Xr halt 8 , @@ -264,4 +252,4 @@ The disklabel format used by this version of is quite different from that of other architectures. .Pp -Some features are, as yet, undocumented. +Some features are not yet documented. |