Supported data path configurations

The data path can be configured using one of the following connection types. For a switch connection, you must set the port to Fabric on, Point-to-Point (F-port).

NoteCreate at least two independent data paths (one per cluster) between the primary storage system and the secondary storage system for hardware redundancy for this critical element.

Direct connection

A direct connection (loop only) is a direct link between the primary and secondary arrays. NL-port (Node Loop) connections are supported for the data path and host-to-system path.

  • Set the Fabric to OFF for the initiator port and the RCU target port.
  • Set the topology to FC-AL.

Switch connection

Switch connections push data from the local switch through a Fibre Channel link across a WAN to the remote switch and Fibre Channel of the secondary storage system. F-port (point-to-point) and FL-port (loop) switch connections are supported.

  • Set the Fabric to ON for the initiator port and the RCU target port.
  • Set the topology to Point-to-Point.

Switches from some vendors, McData ED5000 for example, require an F-port.

Extender connection

Make sure that the extender supports remote I/O. Contact customer support for details.

  • Set the Fabric to ON for the initiator port and the RCU target port.
  • Set the topology to Point-to-Point.
NoteWhen the primary and secondary storage systems are connected using switches with a channel extender, and multiple data paths are configured, the capacity of data to be transmitted might concentrate on particular switches, depending on the configuration and the settings of switch routing. For more information contact the Hitachi Solution Support Center.