Deployment Guide

Table Of Contents
Cable host servers to the storage system
This section describes the different ways that host servers can be connected to a storage system.
Topics:
Cabling considerations
Connecting the enclosure to hosts
Host connection
Cabling considerations
Host interface ports on ME4 Series controller enclosures can connect to respective hosts using direct-attach or switch-attach
methods.
Another important cabling consideration is cabling controller enclosures to enable the replication feature. The FC and iSCSI
product models support replication, but SAS product models do not support replication. See Cabling for replication on page 90.
Use only Dell EMC cables for host connections:
Qualified 16 Gb FC SFP+ transceivers and cable options
Qualified 10 GbE iSCSI SFP+ transceivers and cable options
Qualified 10Gbase-T cable options
Qualified 12 Gb mini-SAS HD cable options
Connecting the enclosure to hosts
A host identifies an external port to which the storage system is attached. The external port may be a port in an I/O adapter
(such as an FC HBA) in a server. Cable connections vary depending on configuration. This section describes host interface
protocols supported by ME4 Series controller enclosures, while showing a few common cabling configurations. ME4 Series
controllers use Unified LUN Presentation (ULP), which enables a host to access mapped volumes through any controller host
port.
ULP can show all LUNs through all host ports on both controllers, and the interconnect information is managed by the controller
firmware. ULP appears to the host as an active-active storage system, allowing the host to select any available path to access
the LUN, regardless of disk group ownership.
CNC technology
The ME4 Series FC/iSCSI models use Converged Network Controller (CNC) technology.
The CNC technology enables you to select the host interface protocols to use on the storage system. The small form-factor
pluggable (SFP+) connectors that are used in CNC ports are further described in the following subsections:
NOTE:
Controller modules are not always shipped with preinstalled SFP+ transceivers. You might need to install SFP
transceivers into the controller modules. Within your product kit, locate the qualified SFP+ transceivers and install
them into the CNC ports. See SFP+ transceiver for FC/iSCSI ports on page 98.
Use the PowerVault Manager to set the host interface protocol for CNC ports using qualified SFP+ transceivers. ME4
Series models ship with CNC ports configured for FC. When connecting CNC ports to iSCSI hosts, you must configure
these ports for iSCSI.
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22 Cable host servers to the storage system