DDN Storage SFA7700X - 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.

Summary

Tools and Backup Battery Readiness

Determining Backup Battery Replacement Need

Explains how to identify when the backup battery requires replacement through system alerts and commands.

Assessing Backup Battery Health

Locating the Controller for Replacement

Outlines the steps to identify the specific controller that needs its battery replaced using system commands.

Controller Removal and Preparation

Locating and Shutting Down the Controller

Details the commands used to locate the controller and safely shut it down for removal.

Opening the Controller Casing

Accessing Internal Components

Backup Battery Pack Replacement

Locating and Accessing the Backup Battery Pack

Disconnecting Battery Cables and Removing Pack

Details disconnecting the baseboard cable and removing the battery pack unit, including CMOS battery screws.

Installing the New Backup Battery Pack

Guides through replacing the old backup battery pack with a new one and reattaching components.

CMOS Battery Replacement

Identifying CMOS Battery Replacement Need

Removing CMOS Battery Assembly

Describes the steps to remove the CMOS battery and its bracket, often as part of the backup battery removal.

Performing the CMOS Battery Swap

Details disconnecting the CMOS battery wires, replacing the battery, and securing it.

Controller Component Removal

Controller Reassembly and Reinstallation

Reattaching Battery Components and Cards

Final Verification and Steps

Verifying Battery Replacement

Describes how to log in and use the SHOW UPS command to verify the successful replacement and new battery date.

DDN Storage SFA7700X Specifications

General

Model	SFA7700X
Category	Storage
Form Factor	Rack-mountable
Drive Bays	Up to 84
Drive Types Supported	SAS, SATA, SSD
Maximum Raw Capacity	Up to 6.7PB
RAID Levels	0, 1, 5, 6, 10, 50, 60
RAID Support	Yes
Scalability	Highly scalable
Drive Type	SSD and HDD
Capacity	Configurable
Connectivity	Fibre Channel, Ethernet, InfiniBand
Data Protection	RAID
Operating System Compatibility	Linux, Windows