I/O Board Module; Switch Module Overview; Power Supply Module; Fan Module - Hitachi Compute Blade 2500 Getting Started Manual

The connection between a management module and an external network is
via a management LAN module.

I/O board module

An I/O board module is a module that installs a PCI Express adapter to a
server blade. You can mount a maximum of 28 I/O board modules to the rear
side of a server chassis.

Switch module overview

A switch module connects the system unit and external networks. An onboard
LAN or a network mezzanine card on a server blade and a switch module are
connected through the backplane within a server chassis. Therefore, you do
not need complicated cable processing. A maximum of 2 switch modules can
be installed on the rear side of a server chassis.
We recommend that NIC teaming applied to the server blade.

Power supply module

A power supply module supplies power to the CB 2500 system unit. By
installing a maximum of 6 power supply modules on the rear side of a server
chassis, you can supply stable power to the system unit.

Fan module

A fan module cools server blades and various modules. There are two types
of fan modules: system fan modules that cool server blades and switch fan
modules that cool switch modules. Fan modules are mounted on the rear side
of a server chassis. Eight system fan modules and two switch fan modules
are installed.
The operation status of fan modules are monitored by cooling fan control
modules. Two cooling fan control modules are mounted on the rear side of a
server chassis.

LPAR manager functionality

The LPAR manager functionality logically partitions a server blade to create
multiple virtual server environments. Each of the partitioned or constructed
virtual server environments is called an LPAR. You can share the resources
(including CPUs, memory, and PCI devices) in the server blade among
partitioned and constructed LPARs. You can construct flexible virtual server
environments that suit your purposes. For example, for a high-load LPAR, you
can use resources in dedicated mode or share them only among limited
LPARs.
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CB 2500 Overview
Hitachi Compute Blade 2500 Series Getting Started Guide