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<h1>
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How to create a ramdisk?
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</h1>
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<ol class="breadcrumb">
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<li>
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<time class="published" datetime="2018-12-24T11:58:00+01:00">
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24 décembre 2018
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<div class='article_content'>
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<h2>Writing to a SSD</h2>
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<p>Let's first write 500Mo to a ssd with the command :</p>
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<div class="highlight"><pre><span></span>dd <span class="k">if</span><span class="o">=</span>/dev/zero <span class="nv">of</span><span class="o">=</span>test.iso <span class="nv">bs</span><span class="o">=</span>1M <span class="nv">count</span><span class="o">=</span><span class="m">500</span>
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</pre></div>
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<p>On my machine with a ssd I get the following results</p>
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<div class="highlight"><pre><span></span><span class="err">500+0 records in</span>
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<span class="err">500+0 records out</span>
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<span class="err">524288000 bytes (524 MB, 500 MiB) copied, 10,153 s, 51,6 MB/s</span>
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</pre></div>
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<h2>Writing to a ramdisk</h2>
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<p>Let's now create a temporary ram disk and see how faster it is </p>
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<div class="highlight"><pre><span></span>mkdir /mnt/ram
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mount -t tmpfs tmpfs /mnt/ram -o <span class="nv">size</span><span class="o">=</span>600M
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<span class="nb">cd</span> /mnt/ram
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dd <span class="k">if</span><span class="o">=</span>/dev/zero <span class="nv">of</span><span class="o">=</span>test.iso <span class="nv">bs</span><span class="o">=</span>1M <span class="nv">count</span><span class="o">=</span><span class="m">500</span>
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</pre></div>
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<p>The results yield a faster write time : </p>
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<div class="highlight"><pre><span></span><span class="err">500+0 records in</span>
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<span class="err">500+0 records out</span>
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<span class="err">524288000 bytes (524 MB, 500 MiB) copied, 6,39849 s, 81,9 MB/s</span>
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</pre></div>
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<p>on a machine with linux installed natively the results shoud be even faster.</p>
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<h3>Find an error or bug? Have a suggestion?</h3>
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<p>Everything on this site is avaliable on GitHub. Head on over and <a href='https://github.com/redoules/redoules.github.io/issues/new'>submit an issue.</a> You can also message me directly by <a href='mailto:guillaume.redoules@gadz.org'>email</a>.</p>
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<center>This project contains 119 pages and is available on <a href="https://github.com/redoules/redoules.github.io">GitHub</a>.
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Copyright © Guillaume Redoulès,
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<time datetime="2018">2018</time>.
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