When defining which resources on the destination system the replicated item will use for an...

Create a replication session

Ensure that you have first created relevant replication interfaces and connections, and then you need the name, pool, storage provisioning, and tiering policy you want to use for the destination storage resource. The system will automatically created a destination storage resource as part of this process.

References: https://www.emc.com/dam/uwaem/documentation/unity-p-replication-config.pdf

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