可以用光纤、铜缆或结合使用二者，直接把存储器连接到集群，或者通过存储区域网络(SAN)交换机连接(请参阅图1)。
Connecting storage to the cluster can be direct or through a storage area network (SAN) switch, either by fiber, copper, or a mixture of the two (see Figure 1).
存储网络层：使用多台存储光纤交换机构成存储冗余网络。
Storage network layer: the use of multiple storage fiber optic switch to form a redundant storage network.
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