Dot Hill Systems AssuredSAN 4544, Setup Manual

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AssuredSAN Ultra48 Series Setup Guide 35
The 10GbE iSCSI ports are used in either of two capacities:
• To connect two storage systems through a switch for use of AssuredRemote replication.
• For attachment to 10GbE iSCSI hosts directly, or through a switch used for the 10GbE iSCSI traffic.
The first usage option requires valid licensing for the AssuredRemote replication feature, whereas the
second option requires that the host computer supports Ethernet, iSCSI, and optionally, multipath I/O.
1 Gb iSCSI protocol
AssuredSAN 4844 controller enclosures support two controller modules using the Internet SCSI interface
protocol for host port connection. Each controller module provides four iSCSI host ports configured with an
RJ-45 SFP supporting data rates up to 1 Gbit/s, using either one-way or mutual CHAP.
TIP: See the “Configuring CHAP” topic in the RAIDar Reference Guide. Also see the admonition about
CHAP preceding the “Using the Replication Setup Wizard” procedure within that guide.
TIP:
Use the RAIDar Configuration Wizard to set iSCSI port options. Within the RAIDar Reference Guide,
see “Configuring the system > Using the Configuration Wizard > Configuring host ports,” and scroll to
iSCSI port options. Use the
show host-parameters
or
show ports
CLI commands to view
information about host ports.
The 1 Gb iSCSI ports are used in either of two capacities:
• To connect two storage systems through a switch for use of AssuredRemote replication.
• For attachment to 1 Gb iSCSI hosts directly, or through a switch used for the 1 Gb iSCSI traffic.
The first usage option requires valid licensing for the AssuredRemote replication feature, whereas the
second option requires that the host computer supports Ethernet, iSCSI, and optionally, multipath I/O.
HD mini-SAS technology
AssuredSAN 4544 models use high-density mini-SAS (Serial Attached SCSI) interface protocol for host
connection.
12 Gb mini-SAS ports
Each controller module provides four SFF-8644 HD mini-SAS host ports supporting data rates up to 12
Gbit/s. HD mini-SAS host ports connect to hosts or switches; they are not used for replication. Use a
qualified SFF-8644 to SFF-8644 cable option when connecting to a 12 Gbit/s host. Use a qualified
SFF-8644 to SFF-8088 option when connecting to a supported 6 Gbit/s host.
Connecting direct attach configurations
AssuredSAN Ultra48 Series controller enclosures support up to eight direct-connect server connections,
four per controller module. Connect appropriate cables from the server’s HBAs to the controller module’s
host ports as described below, and shown in the following illustrations.
Fibre Channel host connection
To connect 4844 controller modules supporting (4/8/16 Gb) FC host interface ports to a server HBA or
switch—using the controller’s CNC ports—select a qualified FC SFP option.
Qualified options support cable lengths of 1 m (3.28'), 2 m (6.56'), 5 m (16.40'), 15 m (49.21'), 30 m
(98.43'), and 50 m (164.04') for OM4 multimode optical cables and OM3 multimode FC cables,
respectively. A 0.5 m (1.64') cable length is also supported for OM3. In addition to providing host
connection, these cables are used for connecting a local storage system to a remote storage system via a
switch, to facilitate use of the optional AssuredRemote replication feature.