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<body class="manpage">
<div id="header">
<h1>
persistent-event-log(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>nvme-persistent-event-log -
   Send NVMe persistent event log page request, returns result and log
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>nvme persistent-event-log</em> &lt;device&gt; [--action=&lt;action&gt; | -a &lt;action&gt;]
                        [--log-len=&lt;log-len&gt; | -l &lt;log-len&gt;] [--raw-binary | -b]
                        [--output-format=&lt;fmt&gt; | -o &lt;fmt&gt;] [--verbose | -v]</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>Retrieves the NVMe persistent event log page from an NVMe device
and provides the returned structure.</p></div>
<div class="paragraph"><p>The &lt;device&gt; parameter is mandatory and may be either the NVMe character
device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).</p></div>
<div class="paragraph"><p>On success, the returned persistent event log structure may be returned
in one of several ways depending on the option flags; the structure may
parsed by the program and printed in a readable format or the raw buffer
may be printed to stdout for another program to parse.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
-a &lt;action&gt;
</dt>
<dt class="hdlist1">
--action=&lt;action&gt;
</dt>
<dd>
<p>
        While try to retrieve this log action the controller shall take
        during processing this persistent log page command. This mandatory
        field, based on the value issued it may Read Log Data, Establish
        Context and Read Log Data or Release Context can occur. For More
        details see NVM Express 1.4 Spec. Section 5.14.1.13 Persistent
        Event Log (Log Identifier 0Dh)
</p>
</dd>
<dt class="hdlist1">
-l &lt;log-len&gt;
</dt>
<dt class="hdlist1">
--log-len=&lt;log-len&gt;
</dt>
<dd>
<p>
        Allocates a buffer of &lt;log-len&gt; bytes size and requests this
        many bytes be returned in the constructed NVMe command. This
        param is mandatory. If &lt;log-len&gt; given is 0 and action is 0,
        it will read the Total Log Length(TLL) of the page.
</p>
</dd>
<dt class="hdlist1">
-b
</dt>
<dt class="hdlist1">
--raw-binary
</dt>
<dd>
<p>
        Print the raw persistent event log buffer to stdout.
</p>
</dd>
<dt class="hdlist1">
-o &lt;fmt&gt;
</dt>
<dt class="hdlist1">
--output-format=&lt;fmt&gt;
</dt>
<dd>
<p>
        Set the reporting format to <em>normal</em>, <em>json</em> or <em>binary</em>. Only one
        output format can be used at a time.
</p>
</dd>
<dt class="hdlist1">
-v
</dt>
<dt class="hdlist1">
--verbose
</dt>
<dd>
<p>
        Increase the information detail in the output.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">EXAMPLES</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
Print the persistent event log page in a human readable format:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme persistent-event-log /dev/nvme0</code></pre>
</div></div>
</li>
<li>
<p>
Print the raw persistent event log to a file:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme persistent-event-log /dev/nvme0 --raw-binary &gt; persistent_log.raw</code></pre>
</div></div>
<div class="paragraph"><p>It is probably a bad idea to not redirect stdout when using this mode.</p></div>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_nvme">NVME</h2>
<div class="sectionbody">
<div class="paragraph"><p>Part of the nvme-user suite</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated
 2025-11-19 00:00:00 UTC
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