Hitachi NAS Platform 4000 Series - Page 27

Component Description
Hitachi NAS
Platform or
Hitachi Unied
Storage File
Module
server
The system can contain a single server or se
veral servers that operate
as a cluster. Clusters that use more than two servers include two 10
Gbps Ethernet switches. Hitachi Vantara supports two switches for
redundancy.
For information about the physical conguration of a cluster
conguration, see the Hitachi NAS Platform and Hitachi Unied Storage
File Module System Installation Guide .
System
management
unit (SMU)
The SMU is the management component for the other components
in a system. An SMU provides administration and monitoring tools. It
supports data migration and replication, and acts as a quorum device
in a cluster conguration. Although integral to the system, the SMU
does not move data between the network client and the servers.
In a single-server conguration, 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
subsystems
A Hitachi NAS Platform system or a Hitachi Unied Storage File
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
(FC) switches
The server supports FC switches that connect multiple servers and
storage subsystems.
See Hitachi Vantara Support Connect for information about which FC
switches are supported.
External Fast
Ethernet
(10/100) or
Gigabit
Ethernet
switches
(HNAS 4040 model only)
A standalone server can operate without an external Ethernet switch,
as long it uses the embedded SMU and there are fewer than three
RAID subsystems attached.
A standalone server requires an external Ethernet switch if there are
more than two RAID subsystems attached or if there are two RAID
subsystems attached and an external SMU is used.
All cluster congurations require an external Ethernet switch.
External 10
Gigabit
Ethernet (10
GbE) switches
A single node server can operate without an external Ethernet switch
if the server uses the embedded SMU. This is also true if fewer than
three RAID subsystems are attached to the server.
If an external SMU is used, a single node server requires a cable from
the SMU to Eth1.
System components
Chapter 4: Hitachi NAS Platform server components
Hitachi NAS Platform and Hitachi Unied Storage Series 4000 Hardware Reference 27