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<body class="manpage">
<div id="header">
<h1>
nvme-id-ns(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>nvme-show-regs -
   Reads and shows the defined NVMe controller registers for NVMe over PCIe or the controller properties for NVMe over Fabrics.
</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 show-regs</em> &lt;device&gt; [--human-readable | -H]
                        [--output-format=&lt;fmt&gt; | -o &lt;fmt&gt;] [--verbose | -v]
                        [--timeout=&lt;timeout&gt; | -t &lt;timeout&gt;]</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>For the NVMe over PCIe device given, sends an identify namespace command and
provides the result and returned structure.
For the NVMe over Fabrics device given, sends a fabric command and provides
the result and returned structure.</p></div>
<div class="paragraph"><p>The &lt;device&gt; parameter is mandatory and must be the nvme admin character
device (ex: /dev/nvme0). For NVMe over PCIe, the program uses knowledge of the
sysfs layout to map the device to the pci resource stored there and mmaps the
memory to get access to the registers. For NVMe over Fabrics, the programs
sends a fabric command to get the properties of the target NVMe controller.
Only the supported properties are displayed.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
-H
</dt>
<dt class="hdlist1">
--human-readable
</dt>
<dd>
<p>
        Display registers or supported properties in human readable format.
</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>
<dt class="hdlist1">
-t &lt;timeout&gt;
</dt>
<dt class="hdlist1">
--timeout=&lt;timeout&gt;
</dt>
<dd>
<p>
        Override default timeout value. In milliseconds.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">EXAMPLES</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
Show the NVMe over PCIe controller registers or the NVMe over Fabric controller
properties in a binary format:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme show-regs /dev/nvme0 -o binary</code></pre>
</div></div>
</li>
<li>
<p>
Show the NVMe over PCIe controller registers or the NVMe over Fabric controller
properties in a human readable format:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme show-regs /dev/nvme0 -H</code></pre>
</div></div>
</li>
<li>
<p>
Show the NVMe over PCIe controller registers or NVMe-oF controller properties
in a json format:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme show-regs /dev/nvme0 -o json</code></pre>
</div></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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