User Guide

System Configuration 3-53
3.6 Power Subsystem
The power subsystem consists of a power backplane, swappable
power supply modules, an optional charger board, and an optional
battery box. These components are held in place by a metal rack
enclosure.
The backplane and the rack allow installation of up to three 400-watt
power supply modules in a redundant configuration. A redundant
power configuration enables a fully-configured system to continue
running even if one power supply fails. The remaining two power
supply modules still satisfy the 800-watt system power requirement.
The charger board and the battery provide a reliable power backup in
case of a total AC power shutdown. Through the charger, the battery
continuously loads power whenever the system power is on.
The power subsystem provide a standby current and a remote on/off
feature to support cold reboot from a remote site. See Chapter 5 for
an overview of the remote diagnostic management (RDM).
Table 3-9 Power Subsystem Configuration
400W Power Module
Normal Redundant Configuration
1 unit 2 units or
3 units
1~2 Pentium Pro CPUs
BP-W7 (L)
7 SCSI hard disks
Full add-on card configuration
2 units 3 units 1~2 Pentium Pro CPUs
BP-W7 (L)
BP-W7 (R)
14 SCSI hard disks
Full add-on card configuration