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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2021-07-02 20:40:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2021-07-02 20:40:30 +0000 |
| commit | dc597ce8df5ae6efd2728a2d7ba7d92486028f79 (patch) | |
| tree | 55b9e9257eba4579667f9522368aa29f5be6754a /Documentation/nvme-compare.html | |
| parent | Initial commit. (diff) | |
| download | nvme-cli-dc597ce8df5ae6efd2728a2d7ba7d92486028f79.tar.xz nvme-cli-dc597ce8df5ae6efd2728a2d7ba7d92486028f79.zip | |
Adding upstream version 1.12.upstream/1.12
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/nvme-compare.html')
| -rw-r--r-- | Documentation/nvme-compare.html | 1063 |
1 files changed, 1063 insertions, 0 deletions
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+<h1>
+nvme-compare(1) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>nvme-compare -
+ Send an NVMe Compare command, provide results
+</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-compare</em> <device> [--start-block=<slba> | -s <slba>]
+ [--block-count=<nlb> | -c <nlb>]
+ [--data-size=<size> | -z <size>]
+ [--metadata-size=<metasize> | -y <metasize>]
+ [--ref-tag=<reftag> | -r <reftag>]
+ [--data=<data-file> | -d <data-file>]
+ [--metadata=<meta> | -M <meta>]
+ [--prinfo=<prinfo> | -p <prinfo>]
+ [--app-tag-mask=<appmask> | -m <appmask>]
+ [--app-tag=<apptag> | -a <apptag>]
+ [--limited-retry | -l]
+ [--force-unit-access | -f]
+ [--dir-type=<type> | -T <type>]
+ [--dir-spec=<spec> | -S <spec>]
+ [--dsm=<dsm> | -D <dsm>]
+ [--show-command | -v]
+ [--dry-run | -w]
+ [--latency | -t]</pre>
+<div class="attribution">
+</div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The Compare command reads the logical blocks specified by the command
+from the medium and compares the data read to a comparison data buffer
+transferred as part of the command. If the data read from the controller
+and the comparison data buffer are equivalent with no miscompares,
+then the command completes successfully. If there is any miscompare,
+the command completes with an error of Compare Failure. If metadata is
+provided, then a comparison is also performed for the metadata.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_options">OPTIONS</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+-s <slba>
+</dt>
+<dt class="hdlist1">
+--start-block=<slba>
+</dt>
+<dd>
+<p>
+ 64-bit address of the first block to access.
+</p>
+</dd>
+<dt class="hdlist1">
+-c <nlb>
+</dt>
+<dt class="hdlist1">
+--block-count=<nlb>
+</dt>
+<dd>
+<p>
+ Number of blocks to be accessed (zero-based).
+</p>
+</dd>
+<dt class="hdlist1">
+-z <size>
+</dt>
+<dt class="hdlist1">
+--data-size=<size>
+</dt>
+<dd>
+<p>
+ Size of data to be compared in bytes.
+</p>
+</dd>
+<dt class="hdlist1">
+-y <metasize>
+</dt>
+<dt class="hdlist1">
+--metadata-size=<metasize>
+</dt>
+<dd>
+<p>
+ Size of metadata to be trasnferred in bytes.
+</p>
+</dd>
+<dt class="hdlist1">
+-r <reftag>
+</dt>
+<dt class="hdlist1">
+--ref-tag=<regtag>
+</dt>
+<dd>
+<p>
+ Reference Tag for Protection Information
+</p>
+</dd>
+<dt class="hdlist1">
+-d <data-file>
+</dt>
+<dt class="hdlist1">
+--data=<data-file>
+</dt>
+<dd>
+<p>
+ Data file.
+</p>
+</dd>
+<dt class="hdlist1">
+-M <meta>
+</dt>
+<dt class="hdlist1">
+--metadata=<meta>
+</dt>
+<dd>
+<p>
+ Metadata file.
+</p>
+</dd>
+<dt class="hdlist1">
+-p <prinfo>
+</dt>
+<dt class="hdlist1">
+--prinfo=<prinfo>
+</dt>
+<dd>
+<p>
+ Protection Information and check field.
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><p>+</p></div>
+<div class="tableblock">
+<table rules="all"
+width="100%"
+frame="border"
+cellspacing="0" cellpadding="4">
+<col width="50%" />
+<col width="50%" />
+<tbody>
+<tr>
+<td align="left" valign="top"><p class="table">Bit</p></td>
+<td align="left" valign="top"><p class="table">Description</p></td>
+</tr>
+<tr>
+<td align="left" valign="top"><p class="table">3</p></td>
+<td align="left" valign="top"><p class="table">PRACT: Protection Information Action. When set to 1, PI is stripped/inserted
+on read/write when the block format’s metadata size is 8. When set to 0,
+metadata is passes.</p></td>
+</tr>
+<tr>
+<td align="left" valign="top"><p class="table">2:0</p></td>
+<td align="left" valign="top"><p class="table">PRCHK: Protection Information Check:</p></td>
+</tr>
+<tr>
+<td align="left" valign="top"><p class="table">2</p></td>
+<td align="left" valign="top"><p class="table">Set to 1 enables checking the guard tag</p></td>
+</tr>
+<tr>
+<td align="left" valign="top"><p class="table">1</p></td>
+<td align="left" valign="top"><p class="table">Set to 1 enables checking the application tag</p></td>
+</tr>
+<tr>
+<td align="left" valign="top"><p class="table">0</p></td>
+<td align="left" valign="top"><p class="table">Set to 1 enables checking the reference tag</p></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+-m <appmask>
+</dt>
+<dt class="hdlist1">
+--app-tag-mask=<appmask>
+</dt>
+<dd>
+<p>
+ App Tag Mask for Protection Information
+</p>
+</dd>
+<dt class="hdlist1">
+-a <apptag>
+</dt>
+<dt class="hdlist1">
+--app-tag=<apptag>
+</dt>
+<dd>
+<p>
+ App Tag for Protection Information
+</p>
+</dd>
+<dt class="hdlist1">
+-l
+</dt>
+<dt class="hdlist1">
+--limited-retry
+</dt>
+<dd>
+<p>
+ Number of limited attempts to media.
+</p>
+</dd>
+<dt class="hdlist1">
+-f
+</dt>
+<dt class="hdlist1">
+--force-unit-access
+</dt>
+<dd>
+<p>
+ FUA option to guarantee that data is stored to media.
+</p>
+</dd>
+<dt class="hdlist1">
+-T <type>
+</dt>
+<dt class="hdlist1">
+--dir-type=<type>
+</dt>
+<dd>
+<p>
+ Optional directive type. The nvme-cli only enforces the value
+ be in the defined range for the directive type, though the NVMe
+ specifcation (1.3a) defines only one directive, 01h, for write
+ stream idenfiers.
+</p>
+</dd>
+<dt class="hdlist1">
+-S <spec>
+</dt>
+<dt class="hdlist1">
+--dir-spec=<spec>
+</dt>
+<dd>
+<p>
+ Optional field for directive specifics. When used with
+ write streams, this value is defined to be the write stream
+ identifier. The nvme-cli will not validate the stream requested
+ is within the controller’s capabilities.
+</p>
+</dd>
+<dt class="hdlist1">
+-D <dsm>
+</dt>
+<dt class="hdlist1">
+--dsm=<dsm>
+</dt>
+<dd>
+<p>
+ The optional data set management attributes for this command. The
+ argument for this is the lower 16 bits of the DSM field in a write
+ command; the upper 16 bits of the field come from the directive
+ specific field, if used. This may be used to set attributes for
+ the LBAs being written, like access frequency, type, latency,
+ among other things, as well as yet to be defined types. Please
+ consult the NVMe specification for detailed breakdown of how to
+ use this field.
+</p>
+</dd>
+<dt class="hdlist1">
+-v
+</dt>
+<dt class="hdlist1">
+--show-cmd
+</dt>
+<dd>
+<p>
+ Print out the command to be sent.
+</p>
+</dd>
+<dt class="hdlist1">
+-w
+</dt>
+<dt class="hdlist1">
+--dry-run
+</dt>
+<dd>
+<p>
+ Do not actually send the command. If want to use --dry-run option,
+ --show-cmd option <em>must</em> be set. Otherwise --dry-run option will be
+ <em>ignored</em>.
+</p>
+</dd>
+<dt class="hdlist1">
+-t
+</dt>
+<dt class="hdlist1">
+--latency
+</dt>
+<dd>
+<p>
+ Print out the latency the IOCTL took (in us).
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_examples">EXAMPLES</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>No examples yet.</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 2018-12-17 13:07:47 MST
+</div>
+</div>
+</body>
+</html>
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