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Revision 1.14 - (show annotations) (download) (as text)
Tue Mar 29 21:04:39 2005 UTC (9 years, 5 months ago) by swift
Branch: MAIN
Changes since 1.13: +6 -4 lines
File MIME type: application/xml
By request of chaggy_ibm, one of JFSs developers, add that any JFS root filesystem must have a "ro" kernel option passed so that it can replay its log before mounting read-write

1 <?xml version='1.0' encoding='UTF-8'?>
2 <!DOCTYPE sections SYSTEM "/dtd/book.dtd">
3
4 <!-- The content of this document is licensed under the CC-BY-SA license -->
5 <!-- See http://creativecommons.org/licenses/by-sa/1.0 -->
6
7 <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-alpha-bootloader.xml,v 1.13 2005/03/28 11:30:52 swift Exp $ -->
8
9 <sections>
10
11 <version>2.1</version>
12 <date>2005-03-29</date>
13
14 <section>
15 <title>Making your Choice</title>
16 <subsection>
17 <title>Introduction</title>
18 <body>
19
20 <p>
21 Now that your kernel is configured and compiled and the necessary system
22 configuration files are filled in correctly, it is time to install a
23 program that will fire up your kernel when you start the system. Such a
24 program is called a <e>bootloader</e>.
25 </p>
26
27 <p>
28 Several bootloaders exist for Linux/Alpha. You must choose one of the supported
29 bootloaders, not all. You have the choice between <uri link="#aboot">aBoot</uri>
30 and <uri link="#milo">MILO</uri>.
31 </p>
32
33 </body>
34 </subsection>
35 </section>
36 <section id="aboot">
37 <title>Default: Using aboot</title>
38 <body>
39
40 <p>
41 We first install aboot on our system. Of course we use <c>emerge</c> to
42 do so:
43 </p>
44
45 <pre caption = "Installing aboot">
46 # <i>emerge --usepkg aboot</i>
47 </pre>
48
49 <p>
50 The next step is to make our bootdisk bootable. This will start
51 <c>aboot</c> when you boot your system. We make our bootdisk bootable by
52 writing the <c>aboot</c> bootloader to the start of the disk.
53 </p>
54
55 <pre caption = "Making your bootdisk bootable">
56 # <i>swriteboot -f3 /dev/sda /boot/bootlx</i>
57 # <i>abootconf /dev/sda 2</i>
58 </pre>
59
60 <note>
61 If you use a different partitioning scheme than the one we use
62 throughout this chapter, you have to change the commands accordingly.
63 Please read the appropriate manual pages (<c>man 8 swriteboot</c> and
64 <c>man 8 abootconf</c>). Also, if your root filesystem is ran using the JFS
65 filesystem, make sure it gets mounted read-only at first by adding <c>ro</c> as
66 a kernel option.
67 </note>
68
69 <p>
70 Additionally, you can make Gentoo boot automatically by setting up the
71 aboot configuration file and some SRM variables. You can try setting
72 these variables from Linux, but it may be easier to do so from the SRM
73 console itself.
74 </p>
75
76 <pre caption = "Automatically booting Gentoo">
77 # <i>echo '0:2/boot/vmlinux.gz root=/dev/sda2' &gt; /etc/aboot.conf</i>
78 # <i>cd /proc/srm_environment/named_variables</i>
79 # <i>echo -n 0 &gt; boot_osflags</i>
80 # <i>echo -n '' &gt; boot_file</i>
81 # <i>echo -n 'BOOT' &gt; auto_action</i>
82 # <i>echo -n 'dkc100' &gt; bootdef_dev</i>
83 <comment>(Substitute dkc100 with whatever your boot device is)</comment>
84 </pre>
85
86 <p>
87 If you need to get into the SRM console again in the future (to recover
88 your Gentoo install, play with some variables, or whatever), just hit
89 CTRL+C to abort the automatic loading process.
90 </p>
91
92 <p>
93 If you're installing using a serial console, don't forget to include
94 the serial console boot flag in <path>aboot.conf</path>. See
95 <path>/etc/aboot.conf.example</path> for some further information.
96 </p>
97
98 <p>
99 Aboot is now configured and ready to use. Continue with <uri
100 link="#reboot">Rebooting the System</uri>.
101 </p>
102
103 </body>
104 </section>
105 <section id="milo">
106 <title>Alternative: Using MILO</title>
107 <body>
108
109 <p>
110 Before continuing, you should decide on how to use MILO. In this
111 section, we will assume that you want to make a MILO boot floppy. If you
112 are going to boot from an MS-DOS partition on your hard disk, you should
113 amend the commands appropriately.
114 </p>
115
116 <p>
117 To install MILO, we use <c>emerge</c>.
118 </p>
119
120 <pre caption = "Installing MILO">
121 # <i>emerge --usepkg milo</i>
122 </pre>
123
124 <p>
125 After MILO has been installed, the MILO images should be in
126 <path>/opt/milo</path>. The commands below make a bootfloppy for use
127 with MILO. Remember to use the correct image for your Alpha-system.
128 </p>
129
130 <pre caption = "Installing MILO on a floppy">
131 <comment>(First insert a blank floppy)</comment>
132 # <i>fdformat /dev/fd0</i>
133 # <i>mformat a:</i>
134 # <i>mcopy /opt/milo/milo-2.2-18-gentoo-ruffian a:\milo</i>
135 # <i>mcopy /opt/milo/linload.exe a:\lilnload.exe</i>
136 <comment>(Only if you have a Ruffian:</comment>
137 # <i>mcopy /opt/milo/ldmilo.exe a:\ldmilo.exe</i>
138 <comment>)</comment>
139 # <i>echo -ne '\125\252' | dd of=/dev/fd0 bs=1 seek=510 count=2</i>
140 </pre>
141
142 <p>
143 Your MILO boot floppy is now ready to boot Gentoo Linux. You may need to
144 set environment variables in your ARCS Firmware to get MILO to start;
145 this is all explained in the <uri
146 link="http://tldp.org/HOWTO/MILO-HOWTO/">MILO-HOWTO</uri> with some examples
147 on common systems, and examples of the commands to use in interactive mode.
148 </p>
149
150 <p>
151 Not reading the <uri link="http://tldp.org/HOWTO/MILO-HOWTO/">MILO-HOWTO</uri>
152 is a <e>bad</e> idea.
153 </p>
154
155 <p>
156 Now continue with <uri link="#reboot">Rebooting the System</uri>.
157 </p>
158
159 </body>
160 </section>
161 <section id="reboot">
162 <title>Rebooting the System</title>
163 <subsection>
164 <body>
165
166 <p>
167 Exit the chrooted environment and unmount all mounted partitions. Then type in
168 that one magical command you have been waiting for: <c>reboot</c>.
169 </p>
170
171 <pre caption="Exiting the chroot, unmounting all partitions and rebooting">
172 # <i>exit</i>
173 cdimage ~# <i>cd</i>
174 cdimage ~# <i>umount /mnt/gentoo/boot /mnt/gentoo/proc /mnt/gentoo</i>
175 cdimage ~# <i>reboot</i>
176 </pre>
177
178 <p>
179 Of course, don't forget to remove the bootable CD, otherwise the CD will be
180 booted again instead of your new Gentoo system.
181 </p>
182
183 <p>
184 Once rebooted in your Gentoo installation, finish up with <uri
185 link="?part=1&amp;chap=11">Finalizing your Gentoo Installation</uri>.
186 </p>
187
188 </body>
189 </subsection>
190 </section>
191
192 </sections>

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