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docs/linux/hdparm.html
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@@ -3,9 +3,9 @@
<h2 id="补充说明">补充说明</h2>
<p><strong>hdparm命令</strong> 提供了一个命令行的接口用于读取和设置IDE或SCSI硬盘参数。</p>
<h3 id="语法">语法</h3>
<pre><code>hdparm(选项)(参数)</code></pre>
<pre><code class="language-bash">hdparm(选项)(参数)</code></pre>
<h3 id="选项">选项</h3>
<pre><code>-a&lt;快取分区&gt;：设定读取文件时，预先存入块区的分区数，若不加上&lt;快取分区&gt;选项，则显示目前的设定；
<pre><code class="language-bash">-a&lt;快取分区&gt;：设定读取文件时，预先存入块区的分区数，若不加上&lt;快取分区&gt;选项，则显示目前的设定；
-A&lt;0或1&gt;：启动或关闭读取文件时的快取功能；
-c&lt;I/O模式&gt;：设定IDE32位I/O模式；
-C：检测IDE硬盘的电源管理模式；
@@ -37,7 +37,7 @@
<p>设备文件：指定id驱动对应的设备文件名。</p>
<h3 id="实例">实例</h3>
<p>显示硬盘的相关设置：</p>
<pre><code>hdparm /dev/sda
<pre><code class="language-bash">hdparm /dev/sda
/dev/sda:
IO_support = 0 (default 16-bit)
readonly = 0 (off)
@@ -45,27 +45,27 @@ readahead = 256 (on)
geometry = 19457［柱面数］/255［磁头数］/63［扇区数］, sectors = 312581808［总扇区数］, start = 0［起始扇区数］
</code></pre>
<p>显示硬盘的柱面、磁头、扇区数：</p>
<pre><code>hdparm -g /dev/sda
<pre><code class="language-bash">hdparm -g /dev/sda
/dev/sda:
geometry = 19457［柱面数］/255［磁头数］/63［扇区数］, sectors = 312581808［总扇区数］, start = 0［起始扇区数］</code></pre>
<p>测试硬盘的读取速度：</p>
<pre><code>hdparm -T /dev/sda
<pre><code class="language-bash">hdparm -T /dev/sda
/dev/sda:
Timing cached reads: 4684 MB in 2.00 seconds = 2342.92 MB/sec</code></pre>
<p>测试硬盘缓存的读取速度：</p>
<pre><code>hdparm -T /dev/xvda
<pre><code class="language-bash">hdparm -T /dev/xvda
/dev/xvda:
Timing cached reads: 11154 MB in 1.98 seconds = 5633.44 MB/sec
</code></pre>
<p>检测硬盘的电源管理模式：</p>
<pre><code>hdparm -C /dev/sda
<pre><code class="language-bash">hdparm -C /dev/sda
/dev/sda:
drive state is: standby [省电模式]</code></pre>
<p>查询并设置硬盘多重扇区存取的扇区数，以增进硬盘的存取效率：</p>
<pre><code>hdparm -m /dev/sda
<pre><code class="language-bash">hdparm -m /dev/sda
hdparm -m #参数值为整数值如8 /dev/sda</code></pre>
<p><strong>附：硬盘坏道修复方法</strong></p>
<pre><code>检查：smartctl -l selftest /dev/sda
<pre><code class="language-bash">检查：smartctl -l selftest /dev/sda
卸载：umount /dev/sda*
修复：badblocks /dev/sda</code></pre>
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