What are the two configuration rules that apply to SRDF groups and connections during Non- Disruptive Migrations'?

During a Non-Disruptive Migration (NDM), specific SRDF groups, known as Data Migration (DM) RDF groups, are automatically created to manage the data transfer. The configuration of these groups and their underlying connections follows specific rules. NDM supports both Fibre Channel (RF) and GigE (RE) director ports for SRDF connectivity. However, if both port types are available between the source and target arrays, the NDM process will prioritize and select the RF ports, typically due to their lower latency and higher performance. Furthermore, for replication to occur, it is a fundamental requirement that each automatically configured DM RDF group must have at least one valid and operational path between the arrays.

A. This describes a general management host connectivity best practice, not a specific SRDF configuration rule required for the NDM data path.
B. NDM creates the necessary SRDF infrastructure for the migration, but a fixed rule of creating exactly two DM RDF groups per Storage Group session is not accurate.
D. A single array can act as a source or target for multiple, concurrent NDM sessions, and therefore can have multiple DM RDF groups configured.

1. Dell Technologies. (2022

April). Dell PowerMax and VMAX All Flash: Non-Disruptive Migration. Technical Note.

Reference for C: Page 11

Section "SRDF connectivity": "Both RF (Fibre Channel) and RE (GigE) ports are supported. If both RF and RE ports are available

RF ports are selected."

Reference for E: Page 11

Section "SRDF groups": "DM RDF groups are configured with a minimum of one path."

Reference against D: Page 11

Section "SRDF groups": The document discusses the creation of DM RDF groups per migration without stating a limit of one per array

and architectural diagrams in other Dell documents often depict arrays in multiple replication relationships.