我有一个装有 Ubuntu 12.04 的盒子，并且刚刚进行了 apt-get 升级。我看到了一个对话框来更新我的 GRUB 引导加载程序，但显示以下消息：
The GRUB boot loader was previously installed to a disk that is no longer present,
or whose unique identifier has changed for some reason. It is important to make sure that the
installed GRUB core image stays in sync with GRUB modules and grub.cfg. Please check
again to make sure that GRUB is written to the appropriate boot devices.
If you're unsure which drive is designated as boot drive by your BIOS, …