Compaq Battery-Backed Write Cache Installation Instructions

Kit Contents
Battery module
Long cable, approximately 35 cm (14 inches)
Short cable, approximately 14 cm (5.5 inches)
Safety Information
WARNING: To reduce the risk of personal injury or damage to the
equipment, consult the safety information and user documentation
provided with your computer before attempting the installation.
Many personal computers are capable of providing energy levels
that are considered hazardous. These computers are intended to be
serviced by qualified personnel trained to deal with these hazards.
Do not remove enclosures or attempt to bypass any interlocks that
may be provided for the purpose of removing these hazardous
conditions.
CAUTION: Discharge of static electricity from a finger or other conductor
can damage your server. To prevent electrostatic damage to your
equipment:
• Transport parts in static-safe containers.
• Place the container on a grounded surface before removing the part.
• Be sure that you are always grounded while installing the battery
module.
• Avoid touching pins, leads, or circuitry.
CAUTION: Observe the following limitations when using the battery
module:
• Do not transfer the battery module to a different model server.
• Do not add or remove the battery module while an array capacity
expansion, RAID level migration, or stripe size migration is in
progress.
Regulatory Notice
The rating label on the device gives the class (A or B) of the
equipment. Class B devices have an FCC logo or ID on the label. Class A devices do not have an FCC logo
or ID on the label. After you determine the class of the device, refer to the server user guide for complete
regulatory compliance notices.
Overview
The battery-backed write cache enabler (also called the battery module) enables write cache, increases
overall controller performance, and maintains any cached data for up to 72 hours. The battery module can
be added to or removed from the server without using any tools.
NOTE: The data protection (and the time limit) also applies if a power outage
occurs. When power is restored to the system, an initialization process writes the
preserved data to the hard drives.