https://dixu.ddns.net/tags/hdparm/ Recent content in Hdparm on Di Hugo -- gohugo.io en Di Xu Mon, 05 Feb 2024 11:22:01 -0500 https://dixu.ddns.net/p/disk-performance/ Mon, 05 Feb 2024 11:22:01 -0500 https://dixu.ddns.net/p/disk-performance/ <h2 id="linux">Linux </h2><h3 id="dd">dd </h3><p>Sequential write</p> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">$ sudo dd if=/dev/zero of=test.img bs=1G count=1 oflag=direct status=progress </span></span></code></pre></td></tr></table> </div> </div><p>Sequential read</p> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">$ sudo dd if=test.img of=/dev/null bs=1G iflag=direct status=progress </span></span></code></pre></td></tr></table> </div> </div><p><code>direct</code>bypasses cache for more realistic results</p> <h3 id="hdparm">hdparm </h3><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">$ sudo hdparm -Tt /dev/sda </span></span></code></pre></td></tr></table> </div> </div><p><code>-T</code> cached read</p> <p><code>-t</code> disk read</p> <h3 id="fio">fio </h3><h3 id="ioping">ioping </h3>