如果服务器中安装了多个操作系统，您需要从引导加载程序菜单中选择需要引导的操作系统。
If you have multiple operating systems installed on your server, you need to select which one you want from the boot loader menu.
在讨论引导新的驱动器之前，需要了解一些引导加载程序理论。
Before I discuss booting up your new drive, a little boot loader theory is required.
我也可以在内置驱动器的MBR中安装引导加载程序，并使用它引导US b驱动器(这时它在GRUB中显示为hd 1 in GRUB)。
I was also able to install a boot loader in the MBR of the internal drive and use that to boot the USB drive (where it appeared as hd1 in GRUB).
这种现象称为链式加载(chain loading)，通常发生在位于主引导记录(MBR)中的引导管理器加载一个分区引导记录中的启动加载程序的时候。
This is called chain loading, and it most frequently occurs when the boot manager that is located in the master boot record (MBR) loads the boot loader that is in a partition boot record.
应用汇编语言编写了二次引导程序，采用16位并行异步存储器加载方式，实现计量单元上电自动运行。
Assemble language was used to write second boot loader, and 16-bit parallel asynchronous memory Loading mode was adopted to achieve automatic run after energization.
应用汇编语言编写了二次引导程序，采用16位并行异步存储器加载方式，实现计量单元上电自动运行。
Assemble language was used to write second boot loader, and 16-bit parallel asynchronous memory Loading mode was adopted to achieve automatic run after energization.
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