SAN与NAS均为常见存储方案，SAN是专用高速存储网络，块级访问，高性能、可扩展，用于数据中心等；NAS是网络存储设备，文件级访问，简单易用，用于办公等。 Sans are typically composed of hosts, switches, storage elements, and storage devices that are interconnected using a variety of technologies, topologies, and protocols. A san typically is a dedicated network of storage devices not accessible through the local area network (lan)
SAN 将数据存储在集中式共享存储中，使企业能够运用一致的方法和工具来实施安全防护、数据保护和灾难恢复。 SAN 是一种基于块的存储，利用高速架构将服务器与其 逻辑磁盘单元 (Logical Disk Unit, LUN) 相连。 A san is a network that operates independently of an organization's operating system and is comprised of many different storage devices. 存储区域网络 (Storage Area Network, SAN) 是企业最常用的存储网络架构，对高吞吐量和低延迟有需求的业务关键型应用往往采用这类架构运行。
A san eliminates single points of failure to enhance storage reliability and availability A san is also optimal for disaster recovery (dr) because a network might include many storage devices, including disk, magnetic tape and optical storage. 什么是SAN存储？ SAN（Storage Area Network，存储区域网）将计算机和存储设备通过专用链路互连，从而实现将数据的存储和管理集中到相对独立的SAN 内。 SAN 架构由存储设备、网络和服务器3 部分组成。 SAN 将数据存储在数据块中，然后将其划分为高速架构中的独立层，并在整个网络中采用一致的安全实践。 这可以带来更富成效的数据存储，同时增强数据保护和安全性。
However, a san is more complex
