ax replacing a battery-backed cache card- master 126682

Here is Your Customized DocumentYour Configuration is:

Action to Perform - ReplaceReplacement Type - Replace Battery-Backed Cache Card

Reporting ProblemsTo send comments or report errors regarding this document, please email:[email protected]. For issues not related to this document, contactyour service provider.Refer to Document ID: 126682

Content Creation Date 2007/9/13

Content Creation Date 2007/9/13

AX150-SeriesReplacing a Battery-Backed

Cache Card

This document describes how to replace the AX150SC or AX150SCibattery-backed cache card.

For greater clarity, the illustrations in this note show the storage-system chassisindependent of a cabinet or deskside mounting hardware.

Topics include

Handling field replaceable units (FRUs) .......................................... 2 Removing the storage processor (SP) assembly................................ 4 Raising the cover on an SP assembly with power supplies................ 6 Replacing the battery-backed cache card ......................................... 7 Lowering the cover on an SP assembly with power supplies ............ 11 Reinstalling the storage processor (SP) assembly ............................. 12 Verifying the operation of a new or replaced part using Navisphere

Express ........................................................................................ 13

1

Handling field replaceable units (FRUs)

This section describes the precautions that you must take and thegeneral procedures you must follow when removing, installing, andstoring any field replaceable unit (FRU).

Power issues and FRUs

Your storage system is designed to be powered on continuously. Mostcomponents are hot repairable; that is, you can replace these componentswhile the storage system is running. Front bezels should always beattached and each compartment should contain a FRU or filler panel toensure EMI compliance and proper air flow over the FRUs.

You should not remove a faulty FRU until you have a replacementavailable.

When you replace or install FRUs, you can inadvertently damage thesensitive electronic circuits in the equipment by simply touching them.Electrostatic charge that has accumulated on your body dischargesthrough the circuits. If the air in the work area is very dry, running ahumidifier in the work area will help decrease the risk of ESD damage.Follow the procedures below to prevent damage to the equipment.

Read and understand the following instructions:

Provide enough room to work on the equipment. Clear the worksite of any unnecessary materials or materials that naturally buildup electrostatic charge, such as foam packaging, foam cups,cellophane wrappers, and similar items.

Do not remove replacement or upgrade FRUs from their antistaticpackaging until you are ready to install them.

Before you service a storage system, gather together the ESD kitand all other materials you will need. Once servicing begins, avoidmoving away from the work site; otherwise, you may build up anelectrostatic charge.

An ESD wristband is supplied with your storage system. To use it,attach the clip of the ESD wristband (strap) to any bare (unpainted)metal on the storage system; then put the wristband around yourwrist with the metal button against your skin.

2 Replacing a Battery-Backed Cache Card

Use the ESD kit when handling any FRU. If an emergency arisesand the ESD kit is not available, follow the procedures in theEmergency procedures (without an ESD kit) section.

Emergency procedures (without an ESD kit)

In an emergency when an ESD kit is not available, use the followingprocedures to reduce the possibility of an electrostatic dischargeby ensuring that your body and the subassembly are at the sameelectrostatic potential.

These procedures are not a substitute for the use of an ESD kit. Followthem only in the event of an emergency.

Before touching any FRU, touch a bare (unpainted) metal surface ofthe cabinet or storage system.

Before removing any FRU from its antistatic bag, place one handfirmly on a bare metal surface of the storage system, and at thesame time, pick up the FRU while it is still sealed in the antistaticbag. Once you have done this, do not move around the room ortouch other furnishings, personnel, or surfaces until you haveinstalled the FRU.

When you remove a FRU from the antistatic bag, avoid touchingany electronic components and circuits on it.

If you must move around the room or touch other surfaces beforeinstalling a FRU, first place the FRU back in the antistatic bag. Whenyou are ready again to install the FRU, repeat these procedures.

Replacing a Battery-Backed Cache Card 3

Removing the storage processor (SP) assembly

Removing the SP assembly from the storage-system chassis providesaccess to internal parts that you can replace, including memory cards,system and CPU fans, and, on single-SP models, a battery-backedcache card.

1. Push the On/Off button to turn off power, and wait a full minutefor the storage system to power down (Figure 1).

Power on/off button Power LED SP A boot/fault LEDEMC3359

Figure 1 Power On/Off button

2. When the storage system is powered down, release the retentionbails and unplug the ac power cords (Figure 2).

EMC3327

Retentionbail

Figure 2 Unplugging the ac power cord from an AX150-series storage system

3. Unplug the Fibre Channel (FE), LAN, and serial cables from theback of the storage system, and label each connection for easyreference when you replace the connections.

4. Push the latches inward to release the SP assembly as you carefullypull the assembly straight out (Figure 3).


! CAUTIONThe SP assembly weighs approximately twenty pounds (9 kg) andcomes completely out of the storage-system chassis; be preparedto support the assembly to avoid dropping it.

EMC3303

SpringRelease

Figure 3 Removing the SP assembly from an AX150-series chassis

5. Place the assembly on a clean, anti-static surface.


Raising the cover on an SP assembly with power supplies

Pull the release knob, and lift the cover up and back until it clicks intoplace (Figure 4).

Once the cover is raised, you can remove a memory card, battery-backedcache card, or CPU fan from the storage-system motherboard.

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EMC3308

ReleaseKnob

Figure 4 Raising the cover on the SP assembly chassis


Replacing the battery-backed cache card

Make sure you have an ESD wriststrap attached to your wrist as youperform the following steps.

Removing the cache card

1. Remove the cache card assembly.

a. If your card does not have a metal knob attached to the springlatch, pull the assembly directly out of the connector and awayfrom the motherboard (Figure 5).

! CAUTIONThe connector pins are delicate; do not rock the cache card asyou remove it from the connector.

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10%Cover removed for clarity

Spring LatchCache Card

EMC3305

Figure 5 Removing the battery-backed cache card from the motherboard


b. If your cache card assembly includes a metal spring latch knob,pull it up as you pull the assembly directly out of the connectorand away from the motherboard (Figure 6).

! CAUTIONThe connector pins are delicate; do not rock the cache card asyou remove it from the connector.

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10%


Cover removed for clarity

EMC2818

Figure 6 Removing the battery-backed cache card from the motherboard (knob latch)

2. Place the cache card in an antistatic bag and return it to your serviceprovider.

Installing the replacement cache card

1. Remove the replacement cache card from its antistatic bag.

2. Align the new card with the motherboard connector and thesecuring tabs on the chassis base.

3. Install the cache card assembly.


a. If your card does not include a metal knob attached to the springlatch, carefully push the cache card directly into the connectoruntil the spring latch clicks into place (Figure 7).

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EMC3306

Figure 7 Connecting the cache card to the motherboard

b. If your cache card assembly includes a metal spring latch knob,pull it up as you carefully push the cache card down andinto the connector; then release the latch to secure the card inposition, as shown in Figure 8.


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EMC2819

Figure 8 Connecting the cache card to the motherboard (knob latch)


Lowering the cover on an SP assembly with power supplies

Release the spring lock on the cover, and lower the cover into place(Figure 9).

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EMC3307

Spring Lock

Figure 9 Lowering the SP assembly cover


Reinstalling the storage processor (SP) assembly

1. Slide the SP assembly into the storage-system chassis (Figure 10).

EMC3304

Figure 10 Installing the AX150-series storage processor (SP) assembly in the chassis

2. Replace the Fibre Channel (FE), LAN, serial cables, and power cordthat you removed earlier.

3. Remove and store the ESD wristband.

4. Power up the storage system.


Verifying the operation of a new or replaced part using NavisphereExpress

1. From a network-connected host, start Navisphere Express for thestorage system by entering the IP address in a browser window.

2. In the Navisphere Express navigation pane, under View, clickComponents.

3. Scan the list of components to verify that all components arerecognized and working properly.

Cache card charging in an AX-series storage system

The discharged cache card in a single-SP storage system may take 3-4hours to fully charge after powerup, during which time a green LED(visible inside the SP assembly from the rear) blinks. A solid greenLED indicates that the card is fully charged. Your storage system willoperate with cache disabled until the card can support cache.

If the cache card was completely discharged before you powered onthe storage system, Navisphere Express may report that the card isfaulted until charging completes.

If your battery-backed cache card shows an amber fault LED, or doesnot appear to be functioning properly within five hours, contact yourservice provider.


Copyright 2005 EMC Corporation. All Rights Reserved.

EMC believes the information in this publication is accurate as of its publication date. Theinformation is subject to change without notice.

THE INFORMATION IN THIS PUBLICATION IS PROVIDED "AS IS." EMC CORPORATIONMAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WITH RESPECT TOTHE INFORMATION IN THIS PUBLICATION, AND SPECIFICALLY DISCLAIMS IMPLIEDWARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Use, copying, and distribution of any EMC software described in this publication requires anapplicable software license. Trademark Information

Trademark Information

EMC2, EMC, CLARiiON, Navisphere, and PowerPath are registered trademarks and Access Logix,FLARE, MirrorView, SAN Copy, and SnapView are trademarks of EMC Corporation.

All other trademarks mentioned herein are the property of their respective owners.


tocThis document describes how to replace the AX150SC or AX150SCi bHandling field replaceable units (FRUs)Power issues and FRUsEmergency procedures (without an ESD kit)

Removing the storage processor (SP) assemblyRaising the cover on an SP assembly with power suppliesReplacing the battery-backed cache cardRemoving the cache cardInstalling the replacement cache card

Lowering the cover on an SP assembly with power suppliesReinstalling the storage processor (SP) assemblyVerifying the operation of a new or replaced part using NavispheCache card charging in an AX-series storage system

Copyright 2005 EMC Corporation. All Rights Reserved .

ax replacing a battery-backed cache card- master 126682

Documents

frusyour storage system

storage processor sp

work area

esd wristband strap

risk of esd damage

field replaceable unit

document id

power issues