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I have heard that ext file system is easy to crash.
Today i forced to shutdown Ubuntu.
As a result,it cannot start up.
It remind me disk error on sda2,should use csdk.
So i input ‘csdk sda2‘,then pressed several yes.
It‘s ok.Everything is recovered.
So don‘t dare any trouble,find the hint.
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原文地址：http://www.cnblogs.com/weidiao/p/5011202.html
