Cross-path configuration
In a cross-path configuration, primary-site and secondary-site servers are
connected to both the primary and secondary storage systems. If a failure
occurs in one storage system, alternate path software is used to switch
server I/O to the paired site. The cluster software is used for failover and
failback.
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Overview of global-active device
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
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