> 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/handbook/di-21-zhang-cun-chu/21.1.-gai-shu.md).

# 21.1.概述

本章介绍了在 FreeBSD 中使用磁盘和存储设备的方法。涉及的内容包括 SCSI 和 IDE 磁盘、CD 和 DVD 光盘、内存盘以及 USB 存储设备。

通过阅读本章，你将了解：

* 如何向 FreeBSD 系统添加额外的硬盘。
* 如何在 FreeBSD 上扩展磁盘分区的大小。
* 如何配置 FreeBSD 以使用 USB 存储设备。
* 如何在 FreeBSD 系统上使用 CD 和 DVD 光盘。
* 如何使用 FreeBSD 下的备份程序。
* 如何设置内存盘。
* 什么是文件系统快照以及如何有效地使用它们。
* 如何使用配额限制磁盘空间的使用。
* 如何加密磁盘和交换分区，以保护它们免受攻击者的威胁。
* 如何配置高度可用的存储网络。

在阅读本章之前，你应该：

* 了解如何 [配置和安装新的 FreeBSD 内核](/handbook/di-10-zhang-pei-zhi-freebsd-nei-he/10.1.-gai-shu.md)。


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