Hitachi NAS Platform 4000 Series Hardware Reference Manual page 27

Component
Hitachi NAS The system can contain a single server or several servers that operate
Platform or as a cluster. Clusters that use more than two servers include two 10
Hitachi Unified Gbps Ethernet switches. Hitachi Vantara supports two switches for
Storage File redundancy.
Module server
For information about the physical configuration of a cluster
configuration, see the Hitachi NAS Platform and Hitachi Unified Storage
File Module System Installation Guide .
System The SMU is the management component for the other components
management in a system. An SMU provides administration and monitoring tools. It
unit (SMU) supports data migration and replication, and acts as a quorum device
in a cluster configuration. Although integral to the system, the SMU
does not move data between the network client and the servers.
In a single-server configuration, typically an embedded SMU manages
the system. In clustered systems and some single-node systems, an
external SMU provides the management functionality. In some cases,
multiple SMUs are advisable.
Storage A Hitachi NAS Platform system or a Hitachi Unified Storage File
subsystems Module system can control several storage enclosures. The maximum
number of storage enclosures in a rack depends on the model of
storage enclosures being installed. Refer to the Storage Subsystem
Administration Guide for more information on supported storage
subsystems.
Fibre Channel The server supports FC switches that connect multiple servers and
(FC) switches storage subsystems.
See Hitachi Vantara Support Connect for information about which FC
switches are supported.
External Fast (HNAS 4040 model only)
Ethernet
A standalone server can operate without an external Ethernet switch,
(10/100) or
as long it uses the embedded SMU and there are fewer than three
Gigabit
RAID subsystems attached.
Ethernet
A standalone server requires an external Ethernet switch if there are
switches
more than two RAID subsystems attached or if there are two RAID
subsystems attached and an external SMU is used.
All cluster configurations require an external Ethernet switch.
External 10 A single node server can operate without an external Ethernet switch
Gigabit if the server uses the embedded SMU. This is also true if fewer than
Ethernet (10 three RAID subsystems are attached to the server.
GbE) switches
If an external SMU is used, a single node server requires a cable from
the SMU to Eth1.
Chapter 4: Hitachi NAS Platform server components
Hitachi NAS Platform and Hitachi Unified Storage Series 4000 Hardware Reference
System components
Description
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