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<title>Restart and power down a system with logical partitions</title>
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<body id="rzaitwronofflpar"><a name="rzaitwronofflpar"><!-- --></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">Restart and power down a system with logical partitions</h1>
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<div><p>Understand how to safely restart and power down a system with logical
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partitions.</p>
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<p>At times you will need to perform an initial program load (IPL) or power
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down the entire system or a single partition.</p>
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<p>It is important to remember that when you perform an IPL on the primary
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partition you are also performing an IPL on all the secondary partitions. </p>
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<p>If you power down the primary partition, you will also power down any secondary
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partitions that are running. Unless you power down the secondary partitions
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before the primary partition, any secondary partitions that are still running
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may have an abnormal IPL.</p>
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<p>Refer to <a href="../rzal2/rzal2kickoff.htm" target="_blank">Basic
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system operations</a> for more information on abnormal IPLs.</p>
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<p>Some of the IPL tasks you can perform are as follows:</p>
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<ul><li>Change a logical partition power schedule</li>
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<li>Change the time on a primary partition.</li>
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<li> Power down the system.</li>
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<li>Restart the system.</li>
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<li>Change operating mode for a logical partition.</li>
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<li>Change the IPL source for a logical partition.</li>
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<li>Restart a secondary logical partition during a system restart.</li>
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<li>Prevent a secondary logical partition from restarting during a system
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restart.</li>
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</ul>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzaitchgpwrscd.htm">Change logical partition power schedule</a></strong><br />
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You can schedule when a secondary partition will power on and power
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off by changing the IPL Date and Time (QIPLDATTIM) system value. You can change
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the QIPLDATTIM system value in Management Central in iSeries™ Navigator.</li>
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<li class="ulchildlink"><strong><a href="rzaittimelpar.htm">Change the time on a primary partition</a></strong><br />
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When changing the time on the primary partition, verify that all secondary partitions are powered on. This will ensure that the configuration data for each secondary load source is updated appropriately.</li>
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<li class="ulchildlink"><strong><a href="rzaitdelaypwroff.htm">Power down a system with logical partitions</a></strong><br />
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The proper way to power down a secondary partition is by using
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the <span class="keyword">i5/OS™</span> power
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down system (PWRDWNSYS) command.</li>
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<li class="ulchildlink"><strong><a href="rzaitiplstart.htm">Restart a system with logical partitions</a></strong><br />
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To restart the whole system (perform a power down and an initial program load (IPL)) the secondary partitions must power down with the primary partition.</li>
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<li class="ulchildlink"><strong><a href="rzaitchngerstartmode.htm">Change the operating mode for a logical partition</a></strong><br />
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The operating mode for logical partitions works just like operating mode on a system without logical partitions.</li>
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<li class="ulchildlink"><strong><a href="rzaitchngiplsource.htm">Change the IPL source for a logical partition</a></strong><br />
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You can choose a separate initial program load (IPL) source (type) for each logical partition.</li>
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<li class="ulchildlink"><strong><a href="rzaitiplparsysrs.htm">Restart a secondary logical partition during a system restart</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzaitholdparsysrs.htm">Prevent a secondary logical partition from restarting during a system restart</a></strong><br />
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When you select this option the logical partition will not start when you perform a system (primary partition) restart or initial program load (IPL).</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaitmanagelparoverview.htm" title="Find all the information you need to manage your logical partitions. Access your logical partition information, and find instructions on restarting and powering down individual logical partitions. Also, use the information to change your logical partition configuration, manage security, and change processing resources.">Manage logical partitions</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzaitchgpwrscd.htm" title="You can schedule when a secondary partition will power on and power off by changing the IPL Date and Time (QIPLDATTIM) system value. You can change the QIPLDATTIM system value in Management Central in iSeries Navigator.">Change logical partition power schedule</a></div>
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<div><a href="rzaittimelpar.htm" title="When changing the time on the primary partition, verify that all secondary partitions are powered on. This will ensure that the configuration data for each secondary load source is updated appropriately.">Change the time on a primary partition</a></div>
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<div><a href="rzaitdelaypwroff.htm" title="The proper way to power down a secondary partition is by using the i5/OS power down system (PWRDWNSYS) command.">Power down a system with logical partitions</a></div>
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<div><a href="rzaitchngerstartmode.htm" title="The operating mode for logical partitions works just like operating mode on a system without logical partitions.">Change the operating mode for a logical partition</a></div>
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<div><a href="rzaitchngiplsource.htm" title="You can choose a separate initial program load (IPL) source (type) for each logical partition.">Change the IPL source for a logical partition</a></div>
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<div><a href="rzaittrouble.htm" title="Find a list of common system reference codes and a suggested corrective action for logical partitions.">Resolve system reference codes for logical partitions</a></div>
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<div><a href="rzaitmainstore.htm" title="Processors use memory to temporarily hold information.">Logical partition concept: memory</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzaitmoveinteractive.htm" title="You can set up interactive performance so that you can change the values between logical partitions without needing to restart the entire system.">Dynamically move interactive performance</a></div>
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<div><a href="rzaitmovememory.htm" title="Memory in each logical partition operates within its assigned minimum and maximum values.">Dynamically move memory</a></div>
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<div><a href="rzaitiplparsysrs.htm">Restart a secondary logical partition during a system restart</a></div>
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<div><a href="rzaitholdparsysrs.htm" title="When you select this option the logical partition will not start when you perform a system (primary partition) restart or initial program load (IPL).">Prevent a secondary logical partition from restarting during a system restart</a></div>
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<div><a href="rzaitiplstart.htm" title="To restart the whole system (perform a power down and an initial program load (IPL)) the secondary partitions must power down with the primary partition.">Restart a system with logical partitions</a></div>
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</div>
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</div>
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