Annotation of sys/arch/alpha/stand/installboot.8, Revision 1.1.1.1
1.1 nbrk 1: .\" $OpenBSD: installboot.8,v 1.10 2007/05/31 19:20:01 jmc Exp $
2: .\" $NetBSD: installboot.8,v 1.2 1997/04/06 08:41:11 cgd Exp $
3: .\"
4: .\" Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved.
5: .\" Copyright (c) 1995 Paul Kranenburg
6: .\" All rights reserved.
7: .\"
8: .\" Redistribution and use in source and binary forms, with or without
9: .\" modification, are permitted provided that the following conditions
10: .\" are met:
11: .\" 1. Redistributions of source code must retain the above copyright
12: .\" notice, this list of conditions and the following disclaimer.
13: .\" 2. Redistributions in binary form must reproduce the above copyright
14: .\" notice, this list of conditions and the following disclaimer in the
15: .\" documentation and/or other materials provided with the distribution.
16: .\" 3. All advertising materials mentioning features or use of this software
17: .\" must display the following acknowledgement:
18: .\" This product includes software developed by Paul Kranenburg.
19: .\" 3. The name of the author may not be used to endorse or promote products
20: .\" derived from this software without specific prior written permission
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22: .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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33: .Dd $Mdocdate: May 31 2007 $
34: .Dt INSTALLBOOT 8 alpha
35: .Os
36: .Sh NAME
37: .Nm installboot
38: .Nd install disk bootstrap software
39: .Sh SYNOPSIS
40: .Nm installboot
41: .Op Fl nv
42: .Ar boot
43: .Ar bootxx
44: .Ar rawdiskdevice
45: .Sh DESCRIPTION
46: The
47: .Nm installboot
48: utility prepares a disk for bootstrapping.
49: .Pp
50: The OpenBSD/alpha disk bootstrap software is split into two parts:
51: a small first-stage boot program that is written into the disklabel
52: area of a disk
53: .Po
54: and hence is limited in size to 7680 bytes
55: .Pc ,
56: and a second-stage boot program that resides in the filesystem proper
57: .Po
58: typically with the name
59: .Pa /boot
60: .Pc .
61: The first-stage boot program is loaded into memory by the SRM console
62: software.
63: After receiving control of the system, it loads the second-stage boot
64: program from a set of filesystem block numbers that have been
65: hard-coded into it by
66: .Nm installboot .
67: The second-stage boot program locates and loads the kernel.
68: .Pp
69: The second-stage boot program and the prototype code for the
70: first-stage boot program can be found in
71: .Pa /usr/mdec/boot
72: and
73: .Pa /usr/mdec/bootxx ,
74: respectively.
75: .Pa /usr/mdec/boot
76: may be installed simply by copying it to the root directory of the
77: partition you wish to boot from, but after it is installed
78: .Nm installboot
79: .Em must
80: be run.
81: .Pp
82: The options recognized by
83: .Nm installboot
84: are as follows:
85: .Bl -tag -width flag
86: .It Fl n
87: Do not actually write anything on the disk.
88: .It Fl v
89: Verbose mode.
90: .El
91: .Pp
92: The arguments are:
93: .Bl -tag -width rawdiskdevice
94: .It Ar boot
95: The name of the second-stage boot program in the file system
96: where the first-stage boot program is to be installed.
97: .It Ar bootxx
98: The name of the prototype file for the first-stage boot program.
99: .It Ar rawdiskdevice
100: The name of the device corresponding to the raw whole-disk partition (the
101: .Dq raw partition )
102: of the disk on which the first-stage boot program is to be installed.
103: .El
104: .Sh EXAMPLES
105: .Pa boot
106: resides in the FFS file system mounted on
107: .Pa /
108: from
109: .Dq sd0a ,
110: you would install the first-stage boot program on the disk
111: (and therefore make the disk bootable) by using the command:
112: .Bd -literal -offset indent
113: # cp /usr/mdec/boot /boot
114: # /usr/mdec/installboot -n -v /boot /usr/mdec/bootxx /dev/rsd0c
115: .Ed
116: .Pp
117: And if the information supplied looks right, run the above without the
118: .Fl n
119: flag.
120: .Sh SEE ALSO
121: .Xr disklabel 8 ,
122: .Xr init 8 ,
123: .Xr sysctl 8
124: .Sh HISTORY
125: The alpha
126: .Nm
127: command first appeared in
128: .Nx 1.2 .
129: .Sh BUGS
130: The OpenBSD/alpha boot blocks can only load kernels from disks'
131: .Dq a
132: partitions.
133: (However, the second-stage boot program may be located on any FFS file system
134: partition on the disk.)
135: .Pp
136: .Nm Installboot
137: requires simultaneous access to the mounted file system and
138: the disks' raw partition.
139: That is not allowed with the kernel
140: .Dv securelevel
141: variable
142: .Po
143: see
144: .Xr sysctl 8
145: .Pc
146: set to a value greater than one, or with
147: .Dv securelevel
148: set to one if the
149: .Dq boot
150: program resides in a file system on the disk's raw partition.
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