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	<title>惜分飞 &#187; asm disk加入lv</title>
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		<title>再一例asm disk被误加入vg并且扩容lv恢复</title>
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		<pubDate>Fri, 17 Feb 2023 12:38:58 +0000</pubDate>
		<dc:creator><![CDATA[惜分飞]]></dc:creator>
				<category><![CDATA[非常规恢复]]></category>
		<category><![CDATA[asm disk加入lv]]></category>
		<category><![CDATA[asmdisk 加入vg]]></category>
		<category><![CDATA[asmdisk损坏恢复]]></category>
		<category><![CDATA[asm磁盘头损坏]]></category>
		<category><![CDATA[asm磁盘组异常恢复]]></category>

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<p>联系：<a href="https://www.xifenfei.com/about_xifenfei" target="_blank">手机/微信(+86 17813235971)   QQ(107644445)</a><a target="_blank" href="http://wpa.qq.com/msgrd?v=3&#038;uin=107644445&#038;site=qq&#038;menu=yes"><img src="https://www.xifenfei.com/wp-content/themes/img/site_qq.jpg" alt="QQ咨询惜分飞" title="QQ咨询惜分飞"/></a></p>
<p>标题：<a href="https://www.xifenfei.com/2023/02/asm-disk-add-vg-extend-lv.html" target="_blank">再一例asm disk被误加入vg并且扩容lv恢复</a></p>
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<p>又一客户把三块asm disk磁盘加入到vg里面(两个节点的root vg中),并且还进行了扩容<br />
<a href="https://www.xifenfei.com/wp-content/uploads/2023/02/sdj-asmdisk.jpg"><img src="https://www.xifenfei.com/wp-content/uploads/2023/02/sdj-asmdisk.jpg" alt="sdj-asmdisk" width="444" height="376" class="alignnone size-full wp-image-10154" /></a><br />
<hr />
加入之后,还对该lv里面进行了expdp数据导出(导出一半失败了,数据库挂了),进而引起了大量的asm磁盘中数据块被文件系统中的expdp导出的dmp复写<br />
<a href="https://www.xifenfei.com/wp-content/uploads/2023/02/20230217200348.jpg"><img src="https://www.xifenfei.com/wp-content/uploads/2023/02/20230217200348.jpg" alt="20230217200348" width="916" height="162" class="alignnone size-full wp-image-10155" /></a><br />
<hr />
通过对损坏磁盘进行kfed分析大概判断损坏到90GB位置<br />
<a href="https://www.xifenfei.com/wp-content/uploads/2023/02/20230217200625.jpg"><img src="https://www.xifenfei.com/wp-content/uploads/2023/02/20230217200625.jpg" alt="20230217200625" width="875" height="478" class="alignnone size-full wp-image-10156" /></a><br />
<hr />
对于这种asm磁盘损坏比较多的情况,常规kfed无法进行修复,只能采用底层基于block层面的扫描恢复,参考:<br />
<a href="https://www.xifenfei.com/2014/04/asm-disk-header-%e5%bd%bb%e5%ba%95%e6%8d%9f%e5%9d%8f%e6%81%a2%e5%a4%8d.html" title="asm disk header 彻底损坏恢复" rel="noopener" target="_blank">asm disk header 彻底损坏恢复</a><br />
通过底层处理恢复出来数据文件:<br />
<a href="https://www.xifenfei.com/wp-content/uploads/2023/02/datafile.jpg"><img src="https://www.xifenfei.com/wp-content/uploads/2023/02/datafile.jpg" alt="datafile" width="834" height="547" class="alignnone size-full wp-image-10157" /></a><br />
<hr />
然后通过可以有的2天之前的备份,结合dul工具,恢复出来最近数据,业务层面进行整合,完成本次数据恢复<br />
有过类似的恢复案例:<br />
<a href="https://www.xifenfei.com/2020/04/asm-disk-add-vg-recovery.html" title="asm disk被加入vg恢复" rel="noopener" target="_blank">asm disk被加入vg恢复</a><br />
<a href="https://www.xifenfei.com/2022/09/asm-disk-add-vg-recovery-2.html" title="又一例asm disk 加入vg故障" rel="noopener" target="_blank">又一例asm disk 加入vg故障</a></p>
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