DDN Storage SFA7700 Series User Manual

HOW TO GUIDE
DDN TECHNICAL SUPPORT | SPT-CRU-0003 (A0) | 27 MAY 2016
© 2016 DDN STORAGE. P/N 15-000836-001 SFA7700 CMOS and Backup Battery Replacement Instructions | 1
SFA7700™
CMOS Coin Cell and Backup Battery
Replacement
The SFA7700 family of products includes not only the SFA7700 but also the SFA7700X and the
embedded processor systems – GS7K (integrated with GRIDScaler) and ES7K (integrated with
EXAScaler).
Each controller contains two batteries, both contained within the body of the controller:
• A battery backup pack.
• A CMOS coin cell battery.
The backup battery serves to provide enough power for the controller to safely flush its cache to the
disks in the event of a power event, thus preserving data integrity. The backup battery pack has a
useable life of three years from the date of manufacture. When the three years have passed, the SFA
OS is designed to place all pools into a write through state to guard against any loss of data.
The CMOS battery serves the same function as that found in regular consumer and enterprise PCs –
to retain certain settings in the unit’s BIOS including current time and date. Its expected life span is
approximately five years.
Because the effective life of the backup battery is less than that of the CMOS battery, most
replacements will be for the backup battery only.
WARNING: Batteries should never be replaced without first consulting DDN Support.
Electrostatic Discharge Warnings (ESD)
Because replacement of the batteries requires direct contact with sensitive interior components, it is
essential that the replacement steps be done in an ESD protected environment.

DDN Storage SFA7700 Series Specifications

General

Brand	DDN Storage
Model	SFA7700 Series
Category	Storage
Language	English

Summary

Safety and Preparation

Electrostatic Discharge (ESD) Precautions

Essential safety measures to prevent static damage to sensitive components during replacement.

Receiving, Storage, and Kit Contents

Guidelines for inspecting, storing batteries, and identifying kit components.

Required Tools

List of essential tools needed for the battery replacement procedure.

Identifying and Replacing the Backup Battery

When to Replace the Backup Battery

Indicators and system alerts that signal the need for backup battery replacement.

Identifying the Controller with the Aging Battery

Steps to identify the specific controller requiring battery service using system commands.

Removing and Replacing the Backup Battery Pack

Detailed instructions for removing the old backup battery pack and installing the new one.

Replacing the CMOS Battery

When to Replace the CMOS Battery

System alerts and voltage readings indicating the need to replace the CMOS battery.

Removing and Replacing the CMOS Battery

Step-by-step guide for the CMOS battery removal and replacement process.

Controller Reassembly and Verification

Controller Reassembly Steps

Instructions for reassembling the controller housing and components.

Placing Controller Back into Enclosure

Steps to reinstall the controller into its bay and secure it.

Final Verification Steps

How to confirm successful battery replacement using system commands.

Additional Information and Support

Disposal of Materials

Guidelines for environmentally responsible disposal of used batteries.

Appendix: Date of Manufacture

Methods to determine the manufacturing date of battery packs.

Contacting DDN Technical Support

Information on how to reach DDN support for assistance and inquiries.