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<body class="manpage">
<div id="header">
<h1>
nvme-dim(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>nvme-dim -
   Send Discovery Information Management command to one or more Discovery Controllers.
</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 dim</em> [--task=&lt;task&gt; | -t &lt;task&gt;] [--nqn=&lt;nqn&gt; | -n &lt;nqn&gt;]
                        [--device=&lt;device&gt; | -d &lt;device&gt;]
                        [--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>Send Discovery Information Management (DIM) command to one or more Discovery
Controllers. The DIM command allows performing two types of tasks: register or
deregister.</p></div>
<div class="paragraph"><p>The DIM command is used to explicitly register with Discovery Controllers (DC),
especially with Central Discovery Controllers (CDC). CDCs maintain a database (DB)
of all the Hosts and Storage Subsystems in a network. The register task is used
to add a host to the CDC&#8217;s DB. The deregister task is used to remove a host from
the CDC&#8217;s DB.</p></div>
<div class="paragraph"><p>During a register operation the host will send mandatory information such as the
Host&#8217;s NQN and ID, as well as the Host&#8217;s hostname and the Operating System&#8217;s
version that it is running on. There is also an optional Host Symbolic Name
that can be registered with the CDC.</p></div>
<div class="paragraph"><p>This command can only be applied to existing DC connections previously created
with the nvme-discover(1) command using the --persistent option.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
-t &lt;task&gt;
</dt>
<dt class="hdlist1">
--task &lt;task&gt;
</dt>
<dd>
<p>
        The task to perform: "register" or "deregister".
</p>
</dd>
<dt class="hdlist1">
-n &lt;subnqn&gt;
</dt>
<dt class="hdlist1">
--nqn &lt;nqn&gt;
</dt>
<dd>
<p>
        The DIM command will be sent to the Discovery Controller (DC) matching this
        NQN. A list of comma-separated NQNs can be supplied to apply the command to
        more than one DC.
</p>
</dd>
<dt class="hdlist1">
-d &lt;device&gt;
</dt>
<dt class="hdlist1">
--device &lt;device&gt;
</dt>
<dd>
<p>
        The DIM command will be sent to the Discovery Controllers (DC) associated
        with this NVMe device handle. A list of comma-separated device handles can
        be supplied to apply the command to more than one DC.
</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>
Register with the Central Discovery Controller (CDC) named
nqn.1988-11.com.dell:SFSS:1:20220118125153e8:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme dim --task=register --nqn=nqn.1988-11.com.dell:SFSS:1:20220118125153e8</code></pre>
</div></div>
</li>
<li>
<p>
Deregister from Central Discovery Controller (CDC) associated with nvme4
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme dim --task=deregister --device=nvme4</code></pre>
</div></div>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph"><p>nvme-discover(1)</p></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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