如果需要数据备份，请用额外的铜缆或光纤链路把备份设备连接到存储服务器。
If data backup is required, connect the backup device to the storage server using an extra copper or fiber link.
每两个单元间具有视频交叉链路通信路径，将能够进行系统备份。
A video cross link communication path between both units will enable system redundancy.
有两个功能，为用户提供智能链路备份和负载平衡。
There are two functions provided for users - Smart Link Backup and Load Balance.
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