IBM DS4800 User Manual

4. Hold open both latches and rotate both levers simultaneously to the closed
position. Release the latches. When you release the latches, you should see
both latches slide over the levers, indicating that the component is locked in
place.
Removing the components
This section provides procedures for removing components from the DS4800 before
lifting it from the shipping box and placing the DS4800 in the cabinet. Removing
components from a DS4800 Storage Subsystem makes the storage subsystem
lighter and easier to lift from the shipping box and install in the rack cabinet. Place
the components on a dry, level, and static-free surface to protect them from
electrostatic discharge after you remove them from the DS4800.
Use these instructions after you have completed all applicable site, rack cabinet,
and DS4800 preparations (as discussed in “Preparing for installation” on page 30)
and installed the support rails (as discussed in “Installing the support rails” on page
33).
You will need an antistatic wrist strap and a cart or level surface (to hold the
components). Observe the precautions listed in “Handling static-sensitive devices”
on page 29. In the following procedure, you will remove the following components
from the storage subsystem before you install it in the rack cabinet:
v RAID controllers
v Power supply-fan units
v Interconnect-battery unit
Statement 4:
≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Attention: A fully populated DS4800 Storage Subsystem weighs 36.52 kg (80.7
lb). Do not attempt to lift the DS4800 Storage Subsystem from the shipping box or
install the unit in the rack cabinet unless all of the components have been removed.
If you choose to lift the DS4800 Storage Subsystem from the shipping box or install
the unit in the rack without removing all of the components first, you do so at your
own risk. For more information on the weights of the individual DS4800 Storage
Subsystem components, see “Specifications” on page 21.
40 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide

IBM DS4800 Specifications

General

Model	IBM DS4800
Storage Type	Disk Array
Drive Types	SAS, SATA
Maximum Number of Drives	112
Host Interfaces	4 Gbps Fibre Channel
Data Transfer Rate	Up to 4 Gbps per port
Power Supply	Dual redundant, hot-swappable
Storage Controller Type	Dual-active
RAID Levels Supported	0, 1, 3, 5, 10

Summary

Safety

Chapter 1. Introduction

Overview

Provides a general description of the IBM System Storage DS4800, its capabilities, and architecture.

Fibre channel defined

Features at a glance

Storage server components

Controllers

Controller cable connections

Fibre channel loop and ID settings

Chapter 2. Installing the storage subsystem

Installation overview

Provides a summary of the DS4800 installation process and key steps.

Preparing for installation

Guides on creating a detailed plan and preparing the site for DS4800 installation.

Preparing the site

Outlines the site requirements, including space, stability, and environmental conditions.

Preparing the rack cabinet

Provides considerations and steps for preparing the rack cabinet for DS4800 installation.

Installing the support rails

Instructions for installing the rack mounting support rails for the DS4800.

Installing the DS4800

Step-by-step instructions for physically installing the DS4800 unit into the rack cabinet.

Removing the components

Replacing the components

Chapter 3. Cabling the storage subsystem

Working with SFPs and fiber-optic cables

Introduces SFPs and fiber-optic cables and their use in connecting the storage subsystem.

Handling fiber-optic cables

Installing SFP modules

Step-by-step instructions for installing Small Form-Factor Pluggable (SFP) modules into the controller ports.

Removing SFP modules

Installing fiber-optic cables

Instructions for connecting fiber-optic cables to SFPs and devices.

Connecting an LC-LC cable to an SFP module

Connecting storage expansion enclosures to the DS4800

Provides guidance on connecting storage expansion enclosures to the DS4800, including cabling topologies.

Redundant drive channel pair

Overview of steps to connect storage expansion enclosure

Outlines the general steps for connecting storage expansion enclosures to the subsystem.

DS4800 drive cabling topologies

Presents preferred cabling topologies for connecting storage expansion enclosures to the DS4800.

Connecting hosts to the DS4800

Provides instructions on how to connect host systems to the DS4800 using redundant Fibre Channel paths.

Configuring the storage subsystem

Outlines the necessary steps and methods for configuring the storage subsystem after installation.

Fibre channel connections

Explains the Fibre Channel connection architecture, including host and drive loops.

Fibre channel host loop configurations

Installing the storage subsystem configuration

Details the steps for installing host systems and host adapters, and connecting interface cables.

Connecting the power cables

Provides instructions for connecting the DS4800 to power sources, including redundant connections.

Chapter 4. Operating the storage subsystem

Best practices guidelines

Offers recommendations for optimal system operation, including shutdown procedures and data backup.

Performing the DS4000 Health Check process

Details a sequence of actions to verify and maintain the optimal performance of DS4000 storage configurations.

Turning the storage subsystem on and off

Provides instructions for powering the storage subsystem on and off during normal and emergency situations.

Turning on the storage subsystem

Details the procedure for powering on the storage subsystem and its components.

Turning off the storage subsystem

Provides instructions for safely powering off the storage subsystem.

Restoring power after an unexpected shutdown

Guides on how to restore power after an unexpected shutdown, including potential data loss considerations.

Performing an emergency shutdown

Outlines the procedure for shutting down the storage subsystem during emergency situations.

Restoring power after an emergency shutdown

Details the procedure to restore power after an unplanned shutdown due to an emergency.

Installing the DS4000 Storage Manager client

Firmware requirements

Monitoring status through software

Checking the LEDs

Front bezel LEDs

RAID controller LEDs

Power supply-fan LEDs

Interconnect-battery unit LEDs

Recovering from an overheated power supply and fan unit

Resetting the controller circuit breakers

Chapter 5. Replacing components

Handling static-sensitive devices

Service Action Allowed status LED

Releasing a component lever

Replacing a controller

Step-by-step instructions for replacing a RAID controller.

Replacing a power supply and fan unit

Procedures for replacing a power supply and fan unit.

Replacing the interconnect-battery unit

Step-by-step instructions for replacing the interconnect-battery unit.

Replacing a backup battery pack

Replacing an SFP module

Chapter 6. Hardware maintenance

General checkout

Solving problems

Guides on using DS4000 Storage Manager and symptom-to-FRU index for diagnosing and resolving problems.