Sun Microsystems J4400 Replacement Manual

Sun Storage J4400 Array

Chassis Replacement Guide

Sun Microsystems, Inc.
www.sun.com

Part No. 820-4601-10
April 2008, Revision A

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Contents

Replacing a J4400 Array Chassis 1

Prerequisites 1

Verifying a Chassis Failure 1

ESD Precautions 2

Removing a Chassis 2

Installing the New Chassis 9

Installing CRUs Into a New Chassis 11

Completing the Chassis Installation 14

Related Documentation 15

iii

iv Sun Storage J4400 Array Chassis Replacement Guide • April 2008

Replacing a J4400 Array Chassis

This document describes replacement procedures for the Sun Storage J4400 Array
chassis.

Caution – Only trained service personnel should remove the covers on this

equipment.

This product is intended for restricted access whereby access is controlled through
the use of a means of security (for example, key, lock, tool, badge access), and
personnel authorized for access have been instructed on the reasons for the
restrictions and any precautions that need to be taken.

Prerequisites

Before you start to replace a failed chassis, you must:

■ Back up all data stored on the array.

■ Stop all system I/O to the array.

■ Verify that the failed chassis is ready to be removed.

■ Prepare the work site and observe all “ESD Precautions” on page 2.

■ Remove all power from the chassis and chassis components.

Verifying a Chassis Failure

To determine that a chassis has failed, check the following:

■ The array System Power/Status LED (front) is amber.

1

■ The audible alarm is sounding.

■ All of the component fault LEDs are green.

■ Disk drive ID/Status LEDs (front) are green

■ SIM Power LED (back) is green

■ Power supply module LEDs (back) are green

Note – A steady amber LED on any component indicates a problem with that

component.

ESD Precautions

Observe the following electrostatic discharge (ESD) precautions:

■ Remove all plastic, vinyl, and foam material from the work area.

■ Wear an antistatic wrist strap at all times when handling any CRU.

■ Before handling any CRU, discharge any static electricity by touching a grounded

surface.

■ After removing a CRU from the cabinet, immediately place it on an antistatic mat.

■ Handle any card that is part of a CRU by its edges only and avoid touching the

components or circuitry.

■ Do not slide a CRU over any surface.

■ Limit body movement (which builds up static electricity) during the removal and

replacement of a CRU.

Removing a Chassis

Caution – You must remove power from the chassis that needs to be replaced

before starting this procedure. All interconnected trays will be disrupted during this
procedure. Powering off one J4400 Array tray causes loss of access to other
interconnected trays.

1. From the back of the cabinet, locate the chassis (also referred to as a tray) that is

being replaced (see “Verifying a Chassis Failure” on page 1).

2. Disconnect the power cord from each power supply (see

2 Sun Storage J4400 Array Chassis Replacement Guide • April 2008

FIGURE 1):

a. Remove the power cord tie strap from each power cord.

Power Cord

Connection from Host
or SIM Link IN to
Management Host

b. Disconnect each power cord from its power supply connector (see

FIGURE 1 Removing the Power Cable and Mini-SAS Cables

Connection Between
Tray 0 and Tray 1

FIGURE 1).

Caution – For products with multiple power cords, all power cords must be

disconnected to completely remove power from the system.

3. Label each mini-SAS cable connection (see

FIGURE 1) for reconnection to the

same connectors on the replacement chassis. For example, “Tray 1, SIM Link
Out to Tray 0, Host or SIM Link IN.”

4. Disconnect the labeled mini-SAS cables from each SIM board.

a. Grasp the metal body of the connector with one hand, and use your other

hand to firmly grasp and pull the tab.

b. Pull the tab gently toward the connector body, and, then with your other

hand, extract the connector from the bulkhead.

Replacing a J4400 Array Chassis 3