Actually, depending on the BIOS setting, the procedure may try to access (in a predefined, customizable order) the first sector (boot sector) of every floppy disk, hard disk, and CD-ROM in the system.

• 事实上，这是由BIOS设置决定的，启动过程会试图读取（以预先定义好的顺序）系统中每一个软盘，硬盘，光驱的第一个扇区（引导扇区）。