Chapter 1: Introduction
Figure 1-9: BBU Module, Controller Top Cover, and the Module Slot
The BBU consists of two major parts. One is the charger circuitry on the RAID
controller. The other is an optional BBU module which contains several battery cells.
By default, the dual-redundant controller subsystem comes with BBU modules. The
BBU module is hot-swappable so it can be replaced while the subsystem is running.
1.2.7 Power Supply Units
Part Number:
IFT-9274CPSU
The subsystem is equipped with three (3) hot-swappable, 1U-profile, 405W PSU
modules (see
Figure 1-10
). The PSU modules are located on the rear panel of the
subsystem.
Figure 1-10: PSU Module
Each PSU module comes with a power socket for power cord plug-in. All three
power supplies are turned on and off using a single power switch on the enclosure
chassis. Each PSU also comes with two (2) embedded cooling fans to provide
sufficient airflow across its heat-generating components and one (1) LED to indicate
the PSU status. A handle at the back of the PSU makes it easier to install or remove
the PSU from the subsystem. While a PSU may be removed while the system is still
online, this should only be done if the PSU has failed and needs to be replaced.
Subsystem Components
1-9