A fan module cools the system unit. There are two types of fan modules:
a system fan module that cools server blades, and a switch fan module
that cools switch modules.
By providing redundant management modules, switch modules, power supply
modules, and fan modules, fault tolerance for the system unit is ensured. In
addition, space is saved by consolidating the power supply required for server
blades into the server chassis and by using switching functionality to share
external network interfaces among the server blades. All modules are hot-
swappable.
Figure 1-1 CB 2500 system unit
Features of the server chassis
The CB 2500 server chassis connects to each module via a backplane.
Therefore, you do not need complicated cable connections. When you add a
server blade, you can connect the server blade by just inserting the server
blade to a standby slot of the server chassis. The CB 2500 can facilitate
integration of traditional rack-mount server systems, such as system
integration and data center operations.
The following shows the number of modules that can be installed in the CB
2500 server chassis.
• A maximum of 8 full-wide blades or a maximum of 14 half-wide blades
can be installed.
• A maximum of 2 switch modules can be installed.
• 2 management modules and 2 management LAN modules are installed.
• A maximum of 6 power supply modules can be installed.
• 8 fan modules and 2 switch modules are installed. 2 cooling fan control
modules that control these fan modules are installed.
• A maximum of 28 I/O board modules can be installed.
CB 2500 Overview
1-3
Hitachi Compute Blade 2500 Series Getting Started Guide
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