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<body class="manpage">
<div id="header">
<h1>
nvme-ns-descs(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>nvme-ns-descs -
   Send NVMe Identify for a list of Namespace Identification                 Descriptor structure, return result and structure
</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 ns-descs</em> &lt;device&gt; [--namespace-id=&lt;nsid&gt; | -n &lt;nsid&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>For the NVMe device given, sends an identify for a list of namespace
identification descriptor structures command and provides the result and
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).
If the character device is given, the <code>'--namespace-id'</code> option is
mandatory, otherwise it will use the ns-id of the namespace for the block
device you opened. For block devices, the ns-id used can be overridden
with the same option.</p></div>
<div class="paragraph"><p>On success, the structure may be returned in one of several ways depending
on the option flags; the structure may be parsed by the program or the
raw buffer may be printed to stdout.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
-n &lt;nsid&gt;
</dt>
<dt class="hdlist1">
--namespace-id=&lt;nsid&gt;
</dt>
<dd>
<p>
        Retrieve the identify namespace identification descriptor structure
        for the given nsid. This is required for the character devices, or
        overrides the block nsid if given.
</p>
</dd>
<dt class="hdlist1">
-b
</dt>
<dt class="hdlist1">
--raw-binary
</dt>
<dd>
<p>
        Print the raw buffer to stdout. Structure is not parsed by
        program.
</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>
If using the character device or overriding namespace #2:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme ns-descs /dev/nvme0 -n 1
# nvme ns-descs /dev/nvme0n1 -n 2
# nvme ns-descs /dev/nvme0 --namespace-id=1</code></pre>
</div></div>
</li>
<li>
<p>
Have the program return the raw structure in binary:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme ns-descs /dev/nvme0n1 --raw-binary &gt; ns_descs.raw
# nvme ns-descs /dev/nvme0n1 -b &gt; ns_descs.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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