能降低成本的原因在于可以使用商用硬件，而不必购买大型的、更强大的机器或更高成本的存储系统。

Lower costs are driven by the ability to use commodity hardware without the need to purchase large more powerful machines or more costly storage systems.

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第3部分详细讨论了存储系统的架构、硬件准备以及存储区域网络(Storage Area Net work, SAN)的设置。

Part 3 takes you through the architecture of the storage system, hardware preparation, and details about setting up a storage Area Network.

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本部分将侧重于讨论存储系统的架构、硬件准备以及存储区域网络（Storage Area Network，SAN）的设置。

This third part takes you through the architecture of the storage system, hardware preparation, and details about setting up a Storage Area Network.

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