而且，如果您的确需要进行紧急系统恢复，也不想将宝贵的时间都浪费在寻找系统恢复所需的足够磁盘空间以及再在mksysb备份中清理数据文件系统的过程。

And, if you do need to do an urgent system recovery, you don't want to lose precious time finding large enough disks to restore to and then have to untangle data file systems from your mksysb backup.

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可能你电脑上已经有一个恢复的映像文件，但是它除占用你的磁盘空间，还有可能误删或是安装系统被格式化掉了。

There has been a recovery image file on your computer, but it in addition to occupying space on your disk, there may accidentally deleted or installation of the system has been formatted off.

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