Nx4 Disk Replace

This document describes how to replace a disk module in a disk processor enclosure (DPE-AX)or disk array enclosure (DAE-AX) in a Celerra NX4 system.

A DPE-AX and DAE-AX are parts of the AX4-5F8 storage system in the NX4 system.

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

Before installing a replacement disk.....................................................................................................................2Configuration rules and recommendations........................................................................................................3Handling field replaceable units (FRUs)..............................................................................................................4Handling disk modules..........................................................................................................................................6Unlocking and removing the DPE-AX or DAE-AX front bezel.......................................................................7Removing a disk module.......................................................................................................................................8Installing a disk module.......................................................................................................................................10Installing and locking the DPE-AX or DAE-AX front bezel...........................................................................13Verifying the operation of a new or replacement part.....................................................................................14Checking system status........................................................................................................................................16Returning the failed part......................................................................................................................................17

EMC® AX4-5F8 Architecture for NX Series

Replacing a Disk Module

Before installing a replacement disk

CAUTION: Before you install a replacement disk, make certain any hot spare configuredwith theoriginal disk pool is completely reconstructed:

1. In a browser on a network-connected host, start Navisphere® Express for the storagesystem by entering the IP address of an SP in the storage system.

(Refer to the release notes on the storage-system support website support website for alist of supported browsers.)

2. In the navigation pane, under Manage, click Hot Spare.

3. Verify that the Replacing field says:

Data has been reconstructed to the hot spare.

4. If the hot spare is still transitioning, wait until the disk pool has written all necessarydata to the hot spare.

2 Replacing a Disk Module

Before installing a replacement disk

Configuration rules and recommendations

The following rules and recommendations apply:

◆ If possible, all disks in an enclosure should have the same speed and capacity. If you areinstalling a disk with a new speed and/or capacity, you need to verify that the FLARE®operating environment (OE) version running on the storage system supports this newdisk. If the version of FLARE OE running on your storage system does not support thedisk you are installing, you must upgrade your storage system to the latest version ofFLARE OE before installing the new disk. For information on the minimum revision ofFLARE OE that supports each disk type, see the AX4-5 Series Disk and FLARE OEMatrixin the Technical descriptions section of the Learn page on the storage-system supportwebsite. You can generate instructions for upgrading FLAREOE from theUpgrade sectionof Service & Support page on the storage-system support website.

◆ All disks in a disk pool should have the same capacity. Since all disks in a pool are boundto match the smallest capacity disk, you will waste disk space if the disks do not havethe same capacity.

◆ All disks in a disk pool should have the same speed.

◆ You cannot use disk modules in slots 0-3 as hot spares. You can configure a hot spare inany other slot; theDPE-AX andDAE-AXallowunused slots (with fillermodules) betweendrives.

For additional information about disk pools and other disk configuration topics, generatethe appropriate planning guide in the Plan section on the Install page of the storage systemsupport website.

Configuration rules and recommendations 3

Configuration rules and recommendations

Handling field replaceable units (FRUs)

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

Power issues and FRUs

Your storage system is designed to be powered on continuously. Most components are hotswappable; that is, you can replace or install these components while the storage system isrunning. Front bezels should always be attached and each compartment should contain aFRU or filler panel to ensure EMI compliance and proper air flow over the FRUs.

You should not remove a faulty FRU until you have a replacement available.

When you replace or install FRUs, you can inadvertently damage the sensitive electroniccircuits in the equipment by simply touching them. Electrostatic charge (ESD) that hasaccumulated on your body discharges through the circuits. If the air in the work area is verydry, running a humidifier in thework areawill help decrease the risk of ESDdamage. Followthe procedures below to prevent damage to the equipment.

Read and understand the following instructions:

◆ Provide enough room to work on the equipment. Clear the work site of any unnecessarymaterials ormaterials that naturally build up electrostatic charge, such as foampackaging,foam cups, cellophane wrappers, and similar items.

◆ Do not remove replacement or upgrade FRUs from their antistatic packaging until youare ready to install them.

◆ Before you service a storage system, gather together the ESD kit and all other materialsyouwill need. Once servicing begins, avoidmoving away from the work site; otherwise,you may build up an electrostatic charge.

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

◆ Use the ESD kit when handling any FRU. If an emergency arises and the ESD kit is notavailable, follow the procedures in the Emergency procedures (without an ESD kit) onpage 4.

Emergency procedures (without an ESD kit)

In an emergency when an ESD kit is not available, use the procedures below to reduce thepossibility of an electrostatic discharge by ensuring that your body and the subassemblyare at the same electrostatic potential. These procedures are not a substitute for the use ofan ESD kit. Follow them only in the event of an emergency.



◆ Before touching any FRU, touch a bare (unpainted)metal surface of the cabinet or storagesystem.

◆ Before removing any FRU from its antistatic bag, place one hand firmly on a bare metalsurface of the storage system, and at the same time, pick up the FRUwhile it is still sealedin the antistatic bac. Once you have done this do not move around the room or touchother furnishings, personnel, or surfaces until you have installed the FRU.

◆ When you remove a FRU from the antistatic bag, avoid touching any electroniccomponents and circuits on it.

◆ If you must move around the room or touch other surfaces before installing a FRU, firstplace the FRU back in the antistatic bag. When you are ready again to install the FRU,repeat these procedures.

Handling field replaceable units (FRUs) 5


Handling disk modules

Diskmodules are extremely sensitive electronic components. Always handle a diskmodulegently, and observe the following guidelines:

◆ Whenever possible or practical, replace a disk module with another of the same model.

Refer to the storage-system support website or contact your sales/service provider for alist of approved disk replacements.

◆ Follow the instructions in the section on handling FRUs in this document.◆ Disk modules are sensitive to the extreme temperatures sometimes encountered during

shipping. We recommend that you leave new disk modules in their shipping material,and expose the package to ambient temperature for at least four hours before attemptingto use the new modules in your storage system.

◆ Always wear a properly attached ESD wristband when removing or replacing a diskmodule.

◆ When removing a disk module, pull the module partially out of the slot, then wait 30seconds for the drive to spin down before removing it.

◆ Place modules on a soft, antistatic surface, such as an industry-standard antistatic foampad or the container used to ship the module.

Never place a disk module directly on a hard surface.

◆ Never hit modules, stack modules, or allow them to tip over or fall.◆ Avoid touching any exposed electronic components and circuits on the disk module.◆ Do not remove a faulty disk module until you have a replacement module (with the

same or an approved part number) or a filler module available.

The part number (PN005xxxxxx) appears on the front of the module.


Handling disk modules

Unlocking and removing the DPE-AX or DAE-AX front bezel

The front bezel is required for EMI compliance when the storage system is powered up.Remove it only to replace or add a part.

You must remove the storage system's front bezel to gain access to the disk modules.

1. Unlock the front bezel by turning the key at the front of the enclosure counterclockwise(Figure 1 on page 7).

2. Press the buttons on the front of the bezel and pull the bezel toward you (Figure 1 onpage 7).

Figure 1. Unlocking and removing the front bezel

Unlocking and removing the DPE-AX or DAE-AX front bezel 7

Unlocking and removing the DPE-AX or DAE-AX front bezel

Removing a disk module

1. Attach an ESD wristband to your wrist and the storage system (see Handling fieldreplaceable units (FRUs) on page 4.

2. If the active light that points to the disk is on steadily:

a. Press the red tab in and pull the ejector handle out; do not pull the handle past 45degrees from the disk (Figure 2 on page 9).

b. Pull the module straight out about 2 inches (5 centimeters) from its slot, and wait 30seconds for the disk to stop spinning (Figure 2 on page 9).

c. Pull the module straight out of it slot, and place it on a static-free surface.

3. If the active light is off ormostly off, you do not need towait for the disk to stop spinning:

a. Press the red tab in and pull the ejector handle out; do not pull the handle past 45degrees from the disk (Figure 2 on page 9).



b. Pull the module straight out of it slot, and place it on a static-free surface (Figure 2on page 9).

Figure 2. Removing a disk module

Removing a disk module 9


Installing a disk module

CAUTION: If you are installing multiple disk modules in a storage system that is powered up,wait at least 10 seconds before sliding the next disk module into position.

1. Attach an ESD wristband to your wrist and the storage system (see Handling fieldreplaceable units (FRUs) on page 4).

2. Align the disk module with the guides in the slot (Figure 3 on page 10).

Figure 3. Aligning the disk module with the guides in the slot

3. Ensure the ejector handle is open at a 45 degree angle from the disk.



4. Gently push the module in by pressing on the right-most thumb space (Figure 4 on page11).

Figure 4. Pressing the right-most thumb space

5. Engage the ejector handle to fully seat the disk module (Figure 5 on page 12).

An audible click indicates the ejector handle is fully seated.

Installing a disk module 11


The disk module’s active light flashes to indicate the spin up sequence is occurring.

Figure 5. Engaging the ejector handle

6. Remove and store the ESD wristband.



Installing and locking the DPE-AX or DAE-AX front bezel

1. Hold the front bezel by its edges and engage it with the two brackets on either side ofthe enclosure (Figure 6 on page 13).

2. Push the bezel in until you feel it latch in place, and then pull back on the bezel slightlyto make sure it is secured (Figure 6 on page 13).

3. Lock the bezel by turning the key clockwise (Figure 6 on page 13).

Figure 6. Installing and locking the front bezel

Installing and locking the DPE-AX or DAE-AX front bezel 13

Installing and locking the DPE-AX or DAE-AX front bezel

Verifying the operation of a new or replacement part

Use Navisphere Express® or Navisphere®Manager to verify the operation of a new orreplacement part.

If the storage system is running Navisphere Express, use Navisphere Express to verify theoperation of a new or replacement part.

If the storage system is running Navisphere Manager, use Navisphere Manager to verifythe operation of a new or replacement part.

Note: All AX4-5 series storage systems ship with Navisphere Express installed. To use NavisphereManager, you need to upgrade your storage system to Navisphere Manager.

Verify the operation of a new or replacement part using NavisphereExpress

1. In a browser on a network-connected host, start Navisphere® Express for the storagesystem by entering the IP address of an SP in the storage system.

2. In the Navisphere Express navigation pane, under View, click Components.

3. Scan the list of components to verify that all components are recognized and workingproperly.

If fault lights on storage system are still lit, go to the Celerra Tools page on thehttp://Powerlink.EMC.com website for more information.

Replacement disk rebuilding

A replacement disk is rebuilt by restoring data to it from the RAID group. Depending onthe size of the disk, how much data is on the disk, and whether I/O is running during therebuild, this process can take from a few minutes to many hours. If Navisphere Manager isinstalled on the storage system, you can determine the progress of the rebuild process fromNavisphereManager by viewing the properties for a LUN containing the replacement disk.The Percent Rebuilt entry on the LUN Properties dialog box displays either the percentageof the rebuild completed during the rebuild process and 100%when the process is complete.



http://Powerlink.EMC.com

Verifying the operation of a new or replacement part using NavisphereManager

1. Start Navisphere®Manager for the storage systemby entering the IP address in a browserwindow.

2. In the Navisphere Manager Storage tree, locate the icon for the storage system in whichyou installed or replaced the part, expand the storage-system icon, and select the Physicalicon.

3. Expand the enclosure in which you installed or replaced the part, and navigate to thepart.

4. Verify that the part is in the enclosure and that it is not faulted.

If fault lights on storage system are still lit, go to the Celerra Tools page on thehttp://Powerlink.EMC.com website for more information.

Replacement disk rebuilding

A replacement disk is rebuilt by restoring data to it from the RAID group. Depending onthe size of the disk, how much data is on the disk, and whether I/O is running during therebuild, this process can take from a few minutes to many hours. You can determine theprogress of the rebuild process from or Navisphere Manager by viewing the properties fora LUN containing the replacement disk. The Percent Rebuilt entry on the LUN Propertiesdialog box displays either the percentage of the rebuild completed during the rebuild processand 100% when the process is complete.

Verifying the operation of a new or replacement part using Navisphere Manager 15


http://Powerlink.EMC.com

Checking system status

Before you begin

You should still be in your HyperTerminal session.

Procedure

To view the system state:

1. Enter the following command to verify the system state:

# /nas/bin/nas_checkup

Example:

# /nas/bin/nas_checkup

]# /nas/bin/nas_checkupCheck Version: <NAS_version>Check Command: /nas/bin/nas_checkupCheck Log : /nas/log/checkup-run.100128-181007.log-------------------------------------Checks-------------------------------------Control Station: Checking if file system usage is underlimit.............. PassControl Station: Checking if NAS Storage API is installedcorrectly........ PassControl Station: Checking if NBS clients arestarted....................... PassControl Station: Checking if NBS configurationexists...................... PassControl Station: Checking if NBS devices areaccessible.................... PassControl Station: Checking if NBS service isstarted........................ PassStorage System : Checking for unsupported storageprofile.................. PassStorage System : Checking if Fibre Channel zone checker is setup.......... N/AStorage System : Checking if Fibre Channel zoning isOK.................... N/AStorage System : Checking if proxy arp issetup............................ PassStorage System : Checking SPA SPBcommunication............................ Pass--------------------------------------------------------------------------------

If the output of the nas_checkup command indicates any problems, correct the problemsand re-do the command before continuing.


Checking system status

Returning the failed part

Ship the failed part to your service provider as described in the instructions that wereincluded with the replacement part.

Returning the failed part 17

Returning the failed part

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Published September 2010

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Nx4 Disk Replace