如果使用新的硬盘（或者想要擦除硬盘上的整个分区表），那么需要创建新的分区表。“Guided partitioning” 会自动做这件事，但当手动分区时，需要在磁盘的顶层入口移动选项并点击 Enter 按键。这会在磁盘上创建新的分区表。在专家模式中，然后您会被询问分区表的类型。基于 UEFI 系统默认为 “gpt”，而对于较旧的 BIOS 默认值为 “msdos”。在标准的优先安装中，会自动使用这些默认值。

	注意
	当选择 “gpt” 类型（对于 UEFI 系统是默认的）的分区表时，在磁盘的开始部分自动创建空余的 1MB 空间。这会要求用于嵌入 GRUB2 启动引导程序。

如果您已经有 Windows 这样的其他操作系统存在，并想在安装 Debian 时保留它们，应该重新设置分区大小，释放空间给 Debian 安装程序。安装程序支持修改 FAT 和 NTFS 文件系统的尺寸；当您进入安装程序的分区步骤，选择 Manual 选项，然后只需选择已有的分区，更改其尺寸。

While modern UEFI systems don't have such limitations as listed below, the old PC BIOS generally adds additional constraints for disk partitioning. There is a limit to how many “primary” and “logical” partitions a drive can contain.

On such old PC BIOS system, “primary” partitions are the original partitioning scheme for PC disks. However, there can only be four of them. To get past this limitation, “extended” and “logical” partitions were invented. By setting one of your primary partitions as an extended partition, you can subdivide all the space allocated to that partition into logical partitions. You can create up to 60 logical partitions per extended partition; however, you can only have one extended partition per drive.