Deployment Guide

Table Of Contents
Host ports and replication
ME4 Series Storage System controller modules can use qualified 10Gbase-T connectors or CNC-based ports for replication.
CNC ports must use qualified SFP+ transceivers of the same type, or they can use a combination of qualified SFP+ transceivers
supporting different interface protocols. To use a combination of different protocols, configure host ports 0 and 1 to use FC,
and configure ports 2 and 3 to use iSCSI. FC and iSCSI ports can be used to perform host I/O or replication, or both.
NOTE: ME4 Series 5U84 enclosures support dual-controller configurations only. ME4 Series 2U controller enclosures
support single controller and dual-controller configurations.
If a partner controller module fails, the storage system fails over and runs on a single controller module until the
redundancy is restored.
In dual-controller module configurations, a controller module must be installed in each slot to ensure sufficient airflow
through the enclosure during operation. In single-controller module configurations, a controller module must be installed
in slot A, and controller module blank must be installed in slot B.
Example cabling for replication
Simplified versions of controller enclosures are used in the cabling figures to show the host ports that are used for I/O or
replication.
Replication supports FC and iSCSI host interface protocols.
The 2U enclosure rear panel represents ME4 Series FC and iSCSI host interface ports.
The 5U84 enclosure rear panel represents ME4 Series FC and iSCSI host interface ports.
Host ports that are used for replication must use the same protocol (either FC or iSCSI).
Blue cables show I/O traffic and green cables show replication traffic.
Once the CNC-based systems or 10Gbase-T systems are physically cabled, see the Dell EMC PowerVault ME4 Series Storage
System Administrators Guide or online help for information about configuring, provisioning, and using the replication feature.
Single-controller module configuration for replication
Cabling two ME4 Series controller enclosures that are equipped with a single controller module for replication.
Multiple servers, multiple switches, one network
The following diagram shows the rear panel of two controller enclosures with I/O and replication occurring on the same
network:
Figure 34. Connecting two storage systems for replication multiple servers, multiple switches, one network
1.
2U controller enclosures 2. Two switches (I/O)
3. Connection to host servers 4. Switch (Replication)
For optimal protection, use multiple switches for host I/O and replication.
Connect two ports from the controller module in the left storage enclosure to the left switch.
Connect two ports from the controller module in the right storage enclosure to the right switch.
Connect two ports from the controller modules in each enclosure to the middle switch.
Cabling for replication
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