现在键入root (hd 0, 0)(或者是你自己得到的返回值)，以告诉Grub该从哪个分区启动，然后键入setup (hd0)以在你的硬盘主引导记录重新安装引导程序。

You should now type root (hd0, 0) (or your equivalent) to tell Grub which partition is being used to boot from, followed by setup (hd0) to reinstall the boot loader into the disk's master boot record.

youdao