72 lines
5.0 KiB
HTML
72 lines
5.0 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="DC.Type" content="task" />
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<meta name="DC.Title" content="Boot from the A and B IPL source" />
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<meta name="abstract" content="A logical partition running Linux can start from either the A or B IPL source." />
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<meta name="description" content="A logical partition running Linux can start from either the A or B IPL source." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzalmbootsource" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Boot from the A and B IPL source</title>
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</head>
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<body id="rzalmbootsource"><a name="rzalmbootsource"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Boot from the A and B IPL source</h1>
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<div><p>A logical partition running Linux can start from either the A or
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B IPL source.</p>
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<div class="p">Linux must be installed on the server and previously loaded from a
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different source before this option can be used. Administration authority
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must be obtained before performing this task. For more information on how
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to configure user profiles, refer to <a href="../rzait/rzaitauthority.htm">Logical partition authority</a> for more information. To
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copy a kernel into the A or B IPL source, the /proc file system is used. The
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command used to copy the kernel into the A IPL source is dd if=/path/to/vmlinux
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of=/proc/iSeries/mf/A/vmlinux bs=4096. The command used to copy the kernel
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into the B IPL source is dd if=/path/to/vmlinux of=/proc/iSeries/mf/B/vmlinux
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bs=4096. The advantage of using this start source is that Linux starts faster.
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A disadvantage is that the start source cannot be saved or restored. It is
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also difficult to tell which IPL source has stored the kernel. If you need
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to pass arguments to the kernel during start, you can modify the kernel command
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line parameters either through the Work with partitions service tool on your i5/OS<sup>®</sup> primary
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partition or through the /proc file system under Linux. </div>
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<div class="section">Follow these steps to set the kernel command line:</div>
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<ol><li class="stepexpand"><span>At the i5/OS command line, type <kbd class="userinput">STRSST</kbd> and
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press <span class="uicontrol">Enter</span>.</span></li>
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<li class="stepexpand"><span>From the Start Service Tools (STRSST) Sign On display, provide
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the Service Tools user ID and password and press <span class="uicontrol">Enter</span>. </span> For more information on how to configure user profiles, refer to <a href="../rzait/rzaitauthority.htm">Logical partition
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authority</a> for more information.</li>
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<li class="stepexpand"><span>From the System Service Tools (SST) display, select option <span class="uicontrol">5</span> (Work
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with servers) and press <span class="uicontrol">Enter</span>.</span></li>
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<li class="stepexpand"><span>From the Work with System Partitions display, select option <span class="uicontrol">3</span> (Work
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with partition configuration) and press <span class="uicontrol">Enter</span>.</span></li>
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<li class="stepexpand"><span>From the Work with Partition configuration display, select option <span class="uicontrol">14</span> (Change
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logical commands) next to the logical partition you want to modify and press <span class="uicontrol">Enter</span>.</span></li>
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<li class="stepexpand"><span>From the Change Guest Environment Command Line Parameters display,
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enter the new kernel command and press <span class="uicontrol">Enter</span>.</span></li>
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</ol>
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<div class="section"><p>To set the kernel command line through the /proc file system for
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the A IPL source, use a variation of the following command: <kbd class="userinput">echo
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-n "root=/dev/iSeries/vda1" >> /proc/iSeries/mf/A/cmdline</kbd></p>
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<p>To
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set the kernel command line through the /proc file system for the B IPL source,
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use a variation of the following command: <kbd class="userinput">echo -n "root=/dev/iSeries/vda1"
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>> /proc/iSeries/mf/B/cmdline</kbd></p>
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</div>
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</div>
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</body>
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</html>
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