https://www.knightli.com/tags/raid%E9%87%8D%E7%BD%AE/ Recent content in RAID重置 on KnightLi的博客 Hugo -- gohugo.io zh-cn Fri, 17 Mar 2023 00:00:00 +0000 https://www.knightli.com/2023/03/17/mdadm-raid-%E9%87%8D%E7%BD%AE/ Fri, 17 Mar 2023 00:00:00 +0000 https://www.knightli.com/2023/03/17/mdadm-raid-%E9%87%8D%E7%BD%AE/ <p>使用mdadm做了raid的磁盘, 再不用raid了以后, 在取下之前,最好重置成普通磁盘,否则在使用时会有各种问题</p> <h2 id="重置过程">重置过程 </h2><ol> <li>检查状态</li> </ol> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt"> 1 </span><span class="lnt"> 2 </span><span class="lnt"> 3 </span><span class="lnt"> 4 </span><span class="lnt"> 5 </span><span class="lnt"> 6 </span><span class="lnt"> 7 </span><span class="lnt"> 8 </span><span class="lnt"> 9 </span><span class="lnt">10 </span><span class="lnt">11 </span><span class="lnt">12 </span><span class="lnt">13 </span><span class="lnt">14 </span><span class="lnt">15 </span><span class="lnt">16 </span><span class="lnt">17 </span><span class="lnt">18 </span><span class="lnt">19 </span><span class="lnt">20 </span><span class="lnt">21 </span><span class="lnt">22 </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">lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT </span></span><span class="line"><span class="cl">NAME SIZE FSTYPE TYPE MOUNTPOINT </span></span><span class="line"><span class="cl">loop0 4K squashfs loop /snap/bare/5 </span></span><span class="line"><span class="cl">loop1 62M squashfs loop /snap/core20/1587 </span></span><span class="line"><span class="cl">loop2 63.3M squashfs loop /snap/core20/1828 </span></span><span class="line"><span class="cl">loop4 239.8M squashfs loop /snap/firefox/2391 </span></span><span class="line"><span class="cl">loop5 400.8M squashfs loop /snap/gnome-3-38-2004/112 </span></span><span class="line"><span class="cl">loop6 346.3M squashfs loop /snap/gnome-3-38-2004/119 </span></span><span class="line"><span class="cl">loop7 91.7M squashfs loop /snap/gtk-common-themes/1535 </span></span><span class="line"><span class="cl">loop8 45.9M squashfs loop /snap/snap-store/582 </span></span><span class="line"><span class="cl">loop9 45.9M squashfs loop /snap/snap-store/638 </span></span><span class="line"><span class="cl">loop10 49.8M squashfs loop /snap/snapd/18357 </span></span><span class="line"><span class="cl">loop11 284K squashfs loop /snap/snapd-desktop-integration/14 </span></span><span class="line"><span class="cl">loop12 304K squashfs loop /snap/snapd-desktop-integration/49 </span></span><span class="line"><span class="cl">loop13 241.6M loop /snap/firefox/2432 </span></span><span class="line"><span class="cl">sda 59.6G disk </span></span><span class="line"><span class="cl">├─sda1 512M vfat part /boot/efi </span></span><span class="line"><span class="cl">└─sda2 59.1G ext4 part / </span></span><span class="line"><span class="cl">nvme0n1 476.9G linux_raid_member disk </span></span><span class="line"><span class="cl">└─md0 953.6G ext4 raid0 /mnt/md0 </span></span><span class="line"><span class="cl">nvme1n1 476.9G linux_raid_member disk </span></span><span class="line"><span class="cl">└─md0 953.6G ext4 raid0 /mnt/md0 </span></span></code></pre></td></tr></table> </div> </div><ol start="2"> <li>查看 linux_raid_member 的磁盘是否有挂载点 如果有使用命令</li> </ol> <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">umount /mnt/md0 </span></span></code></pre></td></tr></table> </div> </div><p>卸载</p> <ol start="3"> <li>停止raid</li> </ol> <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 mdadm --stop /dev/md0 </span></span></code></pre></td></tr></table> </div> </div><ol start="4"> <li>清除 superblock, raid中每块磁盘都要清除</li> </ol> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </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 mdadm --zero-superblock /dev/nvme0n1 </span></span><span class="line"><span class="cl">sudo mdadm --zero-superblock /dev/nvme1n1 </span></span></code></pre></td></tr></table> </div> </div><ol start="5"> <li>检查配置文件,是否需要保留 /etc/mdadm/mdadm.conf /etc/fstab</li> </ol>