学习Centos7软raid5的挂载

环球雄起 發表於 2023-6-15 00:00:00

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注意：raid5必须在三块硬盘及以上且容量应为同等 raid5的硬盘使用率为n-1</p>
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在虚拟机上添加3块硬盘容量为0.2G吧</p>
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添加完以后打开虚拟机查看已添加的硬盘</p>
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<code class="xhtml plain">fdisk -l</code>
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分别建立分区分区格式为raid</p>
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<code class="xhtml plain">fdisk /dev/sdb</code>
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<code class="xhtml plain">fdisk /dev/sdc </code>
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<code class="xhtml plain">fdisk /dev/sdd</code>
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<code class="xhtml plain">n //创建分区 </code>
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<code class="xhtml plain">p //创建主分区 </code>
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<code class="xhtml plain">1 //创建分区1 </code>
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<code class="xhtml plain">回车默认 //起始扇区和Last扇区选择默认按回车就行 </code>
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<code class="xhtml plain">t //转换分区格式 </code>
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<code class="xhtml plain">fd //转换为raid </code>
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<code class="xhtml plain">p //查看已创建的分区结果 </code>
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<code class="xhtml plain">w //保存退出</code>
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查看结果</p>
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<code class="xhtml plain">fdisk -l | grep fd</code>
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开始创建磁盘阵列</p>
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<code class="xhtml plain">mdadm -C /dev/md0 -a yes -l 5 -n 3 /dev/sd{b,c,d} //参数l为raid等级 n为磁盘个数</code>
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为新建的/dev/md0建立类型为xfs的文件系统</p>
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<code class="xhtml plain">mkfs.xfs /dev/md0</code>
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查看已创建结果</p>
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<code class="xhtml plain">mdadm -D /dev/md0</code>
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<p>
创建一个文件夹需要把raid5挂载到这个文件夹</p>
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<code class="xhtml plain">vim /etc/fstab</code>
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末尾添加</p>
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<code class="xhtml plain">/dev/md0 /mnt/raid5 xfs defaults 0 0</code>
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创建mdadm.conf 是为了重启之后能自动启用软raid</p>
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<code class="xhtml plain">mdadm -D -s > /etc/mdadm.conf //这步很重要否则会导致挂载失败</code>
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重启验证</p>
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<code class="xhtml plain">reboot</code>
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<code class="xhtml plain">df -h</code>
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原文链接：https://www.idaobin.com/archives/155.html</p>

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学习Centos7软raid5的挂载