> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/bios/boot-qi-dong/boot-option-1.md).

# Boot Option #1（启动选项 1）

本选项用于设置系统启动时的第一启动设备。用户可以根据自身需求，优先选择从指定设备启动系统。

可用选项如下：

Hard Disk0（硬盘 0）

Hard Disk1（硬盘 1）

eMMC（嵌入式多媒体卡）

CD/DVD（光学介质/光盘）

SD（存储卡）

USB Device（USB 设备，如 U 盘）

Network（网络启动）

Other Device（其他设备）

Disabled（禁用）

具体说明：

用于设置系统的启动顺序。


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