The guest OS doesn't need any special driver to have multipath access to the backend storage.
guest OS不需要任何专门的驱动程序就可以对后端存储进行多路访问。
The example design provides resilience in case of a disaster where, if one half of the storage backend is lost, the other can continue operation.
示例设计还提供了应付灾难的恢复能力，如果存储后端的一半丢失，另一半仍可继续操作。
Storage servers and disks — You can connect several storage servers to a disk-based backend using various mechanisms.
存储服务器和磁盘——可以用多种机制把多台存储服务器连接到基于磁盘的后端。
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