Step by Step Comprehensive Detailed Explanation:

Non-Disruptive Migration (NDM) is a feature in PowerMax that allows you to migrate data between storage arrays without any downtime or disruption to host applications. During NDM, SRDF (Symmetrix Remote Data Facility) is used to replicate data between the source and target arrays. Here are the configuration rules that apply to SRDF groups and connections during NDM:

A. The source and target arrays are at most one hop away from the control host:The control host, which manages the NDM process, must have direct connectivity to both the source and target arrays. This ensures efficient communication and control during the migration.

E. DM RDF groups are configured with a minimum of one path:SRDF groups used for NDM (DM RDF groups) must have at least one active path between the source and target arrays. This ensures that data can be replicated continuously during the migration.

Why other options are incorrect:

B. Two DM RDF groups are created per SG migration session:This is not a strict requirement. The number of DM RDF groups may vary depending on the configuration and the specific NDM operation.

C. RF and RE ports are supported, with RF ports being selected if both types are available:While RF and RE ports are supported for SRDF, there's no specific preference for RF ports during NDM. The choice of ports depends on the overall network configuration and availability.

D. A single array cannot have multiple DM RDF groups:An array can have multiple DM RDF groups if needed for different NDM operations or configurations.

References and documents of Dell's public documentation for PowerMax Operate v.2:

Dell PowerMax Family: Essentials and Best Practices Guide:This guide provides an overview of NDM and its requirements, including information about SRDF configuration.

Dell Solutions Enabler 10.0.0 CLI User Guide:This guide provides detailed information about SRDF commands and configuration options, which are relevant for NDM operations.