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Global Mirror asynchronously copies data from one DS8000 storage system to another, and automatically creates consistency groups (where all target volumes are consistent at the same point in time) many times per hour. These consistent sets of volumes can be used to restart the workload at the remote site in case of a disaster. Since the consistency group is a point-in-time consistent copy of a running system, the DR system is started by doing a crash recovery to roll-back uncommitted changes. Recovery with Global Mirror can be automated, but was not in the demonstration, due to customer requirements.
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