Chapter 3: Connecting Hosts
Connect the Chassis to Hosts
QX and QXS Setup Guide 96
The QXS-3, QXS-4, and QXS-6 Series storage support the optionally-licensed replication feature. Whereas
linear storage supports FC and iSCSI host interface protocols for replication, virtual storage supports iSCSI
host interface protocol for replication. Both linear and virtual storage support all qualified CNC options for
host connection.
FC Protocol
FC protocol is suported on the following systems:
l QXS-312 and QXS-324
l QXS-412, QXS-424, QXS-448, and QXS-456
l QXS-648 and QXS-656
l QXS-1200, QXS-2400, and QXS-5600
The RAID chassis use FC interface protocol for host port connection, featuring two controller I/O modules.
Each controller I/O module provides host ports configured with an FC SFP transceiver connector,
supporting data rates up to 16 Gbit/s. When configured with FC SFPs, these RAID chassis can also be
cabled to support the optionally-licensed replication feature (linear storage only) via the FC ports.
The controller supports Fibre Channel Arbitrated Loop (public or private) or point-to-point topologies. Loop
protocol can be used in a physical loop or in a direct connection between two devices. Point-to-point protocol
is used to connect to a fabric switch.
Point-to-point protocol can also be used for direct connection, and it is the only option supporting direct
connection at 16 Gbit/s. See the set host-parameters command within the QX and QXS CLI
Reference Guide (Doc #: 6-68385-01) for command syntax and details about parameter settings relative to
supported link speeds.
Fibre Channel ports are used in either of two capacities:
l To connect two storage systems through a Fibre Channel switch for use of replication (linear storage
only).
l For attachment to FC hosts directly, or through a switch used for the FC traffic.
The first usage option requires valid licensing for the AssuredRemote replication feature, whereas the
second option requires that the host computer supports FC and optionally, multipath I/O.
Note:Use the Disk Storage Management Utility‘s Configuration Wizard to set FC port options. Use the
set host-parameters CLI command to set FC port options, and use the show ports CLI command
to view information about host ports.
10GbE iSCSI protocol
The QXS-3, QXS-4, and QXS-6 Series storage RAID chassis support two controller I/O modules using the
Internet SCSI interface protocol for host connection. Each controller I/O module provides four host ports
designed for use with a 10GbE iSCSI SFP supporting data rates up to 10 Gbit/s, using either one-way or
mutual CHAP (Challenge-Handshake Authentication Protocol).
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