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1 swift 1.1 <?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 swift 1.8 <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-alpha-bootloader.xml,v 1.7 2004/09/19 19:49:17 vapier Exp $ -->
8 swift 1.1
9     <sections>
10     <section>
11     <title>Making your Choice</title>
12     <subsection>
13     <title>Introduction</title>
14     <body>
15    
16     <p>
17     Now that your kernel is configured and compiled and the necessary system
18     configuration files are filled in correctly, it is time to install a
19     program that will fire up your kernel when you start the system. Such a
20     program is called a <e>bootloader</e>.
21     </p>
22    
23     <p>
24     Several bootloaders exist for Linux/Alpha. You must choose one of the supported
25     bootloaders, not all. You have the choice between <uri link="#aboot">aBoot</uri>
26     and <uri link="#milo">MILO</uri>.
27     </p>
28    
29     </body>
30     </subsection>
31     </section>
32     <section id="aboot">
33     <title>Default: Using aboot</title>
34     <body>
35    
36     <p>
37     We first install aboot on our system. Of course we use <c>emerge</c> to
38     do so:
39     </p>
40    
41     <pre caption = "Installing aboot">
42     # <i>emerge --usepkg aboot</i>
43     </pre>
44    
45     <p>
46     The next step is to make our bootdisk bootable. This will start
47     <c>aboot</c> when you boot your system. We make our bootdisk bootable by
48     writing the <c>aboot</c> bootloader to the start of the disk.
49     </p>
50    
51     <pre caption = "Making your bootdisk bootable">
52     # <i>swriteboot -f3 /dev/sda /boot/bootlx</i>
53     # <i>abootconf /dev/sda 2</i>
54     </pre>
55    
56     <note>
57     If you use a different partitioning scheme than the one we use
58     throughout this chapter, you have to change the commands accordingly.
59     Please read the appropriate manual pages (<c>man 8 swriteboot</c> and
60     <c>man 8 abootconf</c>).
61     </note>
62    
63     <p>
64 vapier 1.5 Additionally, you can make Gentoo boot automatically by setting up the
65 vapier 1.7 aboot configuration file and some SRM variables. You can try setting
66     these variables from Linux, but it may be easier to do so from the SRM
67     console itself.
68 swift 1.1 </p>
69    
70 vapier 1.5 <pre caption = "Automatically booting Gentoo">
71 swift 1.1 # <i>echo '0:2/boot/vmlinux.gz root=/dev/sda2' &gt; /etc/aboot.conf</i>
72 vapier 1.6 # <i>cd /proc/srm_environment/named_variables</i>
73     # <i>echo -n 0 &gt; boot_osflags</i>
74     # <i>echo -n '' &gt; boot_file</i>
75 vapier 1.7 # <i>echo -n 'BOOT' &gt; auto_action</i>
76 vapier 1.6 # <i>echo -n 'dkc100' &gt; bootdef_dev</i>
77     <comment>(Substitute dkc100 with whatever your boot device is)</comment>
78 swift 1.1 </pre>
79    
80     <p>
81 vapier 1.5 If you need to get into the SRM console again in the future (to recover
82     your Gentoo install, play with some variables, or whatever), just hit
83     CTRL+C to abort the automatic loading process.
84     </p>
85    
86     <p>
87     If you're installing using a serial console, don't forget to include
88     the serial console boot flag in <path>aboot.conf</path>. See
89     <path>/etc/aboot.conf.example</path> for some further information.
90 swift 1.1 </p>
91    
92     <p>
93     Aboot is now configured and ready to use. Continue with <uri
94 swift 1.3 link="#reboot">Rebooting the System</uri>.
95 swift 1.1 </p>
96    
97     </body>
98     </section>
99     <section id="milo">
100     <title>Alternative: Using MILO</title>
101     <body>
102    
103     <p>
104     Before continuing, you should decide on how to use MILO. In this
105     section, we will assume that you want to make a MILO boot floppy. If you
106     are going to boot from an MS-DOS partition on your hard disk, you should
107     amend the commands appropriately.
108     </p>
109    
110     <p>
111     To install MILO, we use <c>emerge</c>.
112     </p>
113    
114     <pre caption = "Installing MILO">
115     # <i>emerge --usepkg milo</i>
116     </pre>
117    
118     <p>
119     After MILO has been installed, the MILO images should be in
120     <path>/opt/milo</path>. The commands below make a bootfloppy for use
121     with MILO. Remember to use the correct image for your Alpha-system.
122     </p>
123    
124     <pre caption = "Installing MILO on a floppy">
125     <comment>(First insert a blank floppy)</comment>
126     # <i>fdformat /dev/fd0</i>
127     # <i>mformat a:</i>
128     # <i>mcopy /opt/milo/milo-2.2-18-gentoo-ruffian a:\milo</i>
129     # <i>mcopy /opt/milo/linload.exe a:\lilnload.exe</i>
130     <comment>(Only if you have a Ruffian:</comment>
131     # <i>mcopy /opt/milo/ldmilo.exe a:\ldmilo.exe</i>
132     <comment>)</comment>
133     # <i>echo -ne '\125\252' | dd of=/dev/fd0 bs=1 seek=510 count=2</i>
134     </pre>
135    
136     <p>
137     Your MILO boot floppy is now ready to boot Gentoo Linux. You may need to
138     set environment variables in your ARCS Firmware to get MILO to start;
139     this is all explained in the <uri
140     link="http://tldp.org/HOWTO/MILO-HOWTO/">MILO-HOWTO</uri> with some examples
141     on common systems, and examples of the commands to use in interactive mode.
142     </p>
143    
144     <p>
145     Not reading the <uri link="http://tldp.org/HOWTO/MILO-HOWTO/">MILO-HOWTO</uri>
146     is a <e>bad</e> idea.
147     </p>
148    
149     <p>
150 swift 1.3 Now continue with <uri link="#reboot">Rebooting the System</uri>.
151 swift 1.1 </p>
152    
153     </body>
154     </section>
155 cam 1.4 <section id="reboot">
156 swift 1.3 <title>Rebooting the System</title>
157     <subsection>
158     <body>
159    
160     <p>
161     Exit the chrooted environment and unmount all mounted partitions. Then type in
162     that one magical command you have been waiting for: <c>reboot</c>.
163     </p>
164    
165     <pre caption="Exiting the chroot, unmounting all partitions and rebooting">
166     # <i>exit</i>
167 swift 1.8 cdimage ~# <i>cd</i>
168 swift 1.3 cdimage ~# <i>umount /mnt/gentoo/boot /mnt/gentoo/proc /mnt/gentoo</i>
169     cdimage ~# <i>reboot</i>
170     </pre>
171    
172     <p>
173     Of course, don't forget to remove the bootable CD, otherwise the CD will be
174     booted again instead of your new Gentoo system.
175     </p>
176    
177     <p>
178     Once rebooted in your Gentoo installation, finish up with <uri
179     link="?part=1&amp;chap=11">Finalizing your Gentoo Installation</uri>.
180     </p>
181    
182     </body>
183     </subsection>
184     </section>
185    
186 swift 1.1 </sections>

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