The f switch tells the command to automatically fix errors and the r switch locates bad sectors and recovers readable data.
f开关告诉命令去自动修理错误，r开关则定位坏的扇区并恢复可读数据。
The f switch tells the command to automatically fix errors and the r switch locates bad sectors and recovers readable data.
f开关告诉命令去自动修理错误，r开关则定位坏的扇区并恢复可读数据。
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