@wx0 我是想:一个逻辑s…

@wx0 我是想:一个逻辑sector上存储一些信息,我直接写新的垃圾信息进入,不就覆盖了原有的信息了么?他还怎么恢复出原来的信息?写了新的信息后,原来的信息存放在哪?

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