Q I'm getting a Grub 1.5 Error 21 after installing Ubuntu on an external hard drive.

我在一台外接硬盘上安装了Ubuntu之后发生了Grub 1.5的21号错误。

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An error occurred while ScanDisk was attempting to correct the previous error. Complete a thorough check of this drive.

“磁盘扫描程序”试图修正前面的错误时出错。请对这个驱动器运行完全检查。

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Hard disk drive components including the hard drive, a power cable, a data cable, and the controller card. If an error message indicates there is a hard disk problem, try following these steps.

硬盘驱动器组件包括硬盘驱动器、电力电缆、数据电缆、控制卡等。

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