This document provides instructions for replacing a disk module in a Celerra NX4 storage system. It describes removing the front bezel of the disk processor enclosure or disk array enclosure, safely removing the faulty disk module, installing the replacement module, and reinstalling the front bezel. Guidelines are provided for handling field replaceable units and disk modules to prevent electrostatic discharge damage.

1. 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 chassis
independent of a cabinet or deskside mounting hardware.
Before installing a replacement disk.....................................................................................................................2
Configuration rules and recommendations........................................................................................................3
Handling field replaceable units (FRUs)..............................................................................................................4
Handling disk modules..........................................................................................................................................6
Unlocking and removing the DPE-AX or DAE-AX front bezel.......................................................................7
Removing a disk module.......................................................................................................................................8
Installing a disk module.......................................................................................................................................10
Installing and locking the DPE-AX or DAE-AX front bezel...........................................................................13
Verifying the operation of a new or replacement part.....................................................................................14
Checking system status........................................................................................................................................16
Returning the failed part......................................................................................................................................17
EMC® AX4-5F8 Architecture for NX Series
Replacing a Disk Module

2. Before installing a replacement disk
CAUTION: Before you install a replacement disk, make certain any hot spare configured with the
original disk pool is completely reconstructed:
1. In a browser on a network-connected host, start Navisphere® Express for the storage
system 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 a
list 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 necessary
data to the hot spare.
2 Replacing a Disk Module
Before installing a replacement disk

3. 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 are
installing 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 new
disk. If the version of FLARE OE running on your storage system does not support the
disk you are installing, you must upgrade your storage system to the latest version of
FLARE OE before installing the new disk. For information on the minimum revision of
FLARE OE that supports each disk type, see the AX4-5 Series Disk and FLARE OE Matrix
in the Technical descriptions section of the Learn page on the storage-system support
website. You can generate instructions for upgrading FLARE OE from the Upgrade section
of 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 bound
to match the smallest capacity disk, you will waste disk space if the disks do not have
the 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 in
any other slot; the DPE-AX and DAE-AX allow unused slots (with filler modules) between
drives.
For additional information about disk pools and other disk configuration topics, generate
the appropriate planning guide in the Plan section on the Install page of the storage system
support website.
Configuration rules and recommendations 3
Configuration rules and recommendations

4. Handling field replaceable units (FRUs)
This section describes the precautions that you must take and the general procedures that
you 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 hot
swappable; that is, you can replace or install these components while the storage system is
running. Front bezels should always be attached and each compartment should contain a
FRU 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 electronic
circuits in the equipment by simply touching them. Electrostatic charge (ESD) that has
accumulated on your body discharges through the circuits. If the air in the work area is very
dry, running a humidifier 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 work site of any unnecessary
materials or materials that naturally build up electrostatic charge, such as foam packaging,
foam cups, cellophane wrappers, and similar items.
◆ Do not remove replacement or upgrade FRUs from their antistatic packaging until you
are ready to install them.
◆ Before you service a storage system, gather together the ESD kit and all other materials
you will need. Once servicing begins, avoid moving 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 the
ESD wristband (strap) to any bare (unpainted) metal on the storage system; then put the
wristband 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 not
available, follow the procedures in the Emergency procedures (without an ESD kit) on
page 4.
Emergency procedures (without an ESD kit)
In an emergency when an ESD kit is not available, use the procedures below to reduce the
possibility of an electrostatic discharge by ensuring that your body and the subassembly
are at the same electrostatic potential. These procedures are not a substitute for the use of
an ESD kit. Follow them only in the event of an emergency.
4 Replacing a Disk Module
Handling field replaceable units (FRUs)

5. ◆ Before touching any FRU, touch a bare (unpainted) metal surface of the cabinet or storage
system.
◆ Before removing any FRU from its antistatic bag, place one hand firmly on a bare metal
surface of the storage system, and at the same time, pick up the FRU while it is still sealed
in the antistatic bac. Once you have done this do not move around the room or touch
other furnishings, personnel, or surfaces until you have installed the FRU.
◆ When you remove a FRU from the antistatic bag, avoid touching any electronic
components and circuits on it.
◆ If you must move around the room or touch other surfaces before installing a FRU, first
place 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 field replaceable units (FRUs)

6. Handling disk modules
Disk modules are extremely sensitive electronic components. Always handle a disk module
gently, 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 a
list 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 attempting
to use the new modules in your storage system.
◆ Always wear a properly attached ESD wristband when removing or replacing a disk
module.
◆ When removing a disk module, pull the module partially out of the slot, then wait 30
seconds for the drive to spin down before removing it.
◆ Place modules on a soft, antistatic surface, such as an industry-standard antistatic foam
pad 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.
6 Replacing a Disk Module
Handling disk modules

7. 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 on
page 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

8. Removing a disk module
1. Attach an ESD wristband to your wrist and the storage system (see Handling field
replaceable 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 45
degrees from the disk (Figure 2 on page 9).
b. Pull the module straight out about 2 inches (5 centimeters) from its slot, and wait 30
seconds 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 or mostly off, you do not need to wait for the disk to stop spinning:
a. Press the red tab in and pull the ejector handle out; do not pull the handle past 45
degrees from the disk (Figure 2 on page 9).
8 Replacing a Disk Module
Removing a disk module

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

10. 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 field
replaceable 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.
10 Replacing a Disk Module
Installing a disk module

11. 4. Gently push the module in by pressing on the right-most thumb space (Figure 4 on page
11).
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
Installing a disk module

12. 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.
12 Replacing a Disk Module
Installing a disk module

13. 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 of
the 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 slightly
to 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

14. Verifying the operation of a new or replacement part
Use Navisphere Express® or Navisphere® Manager to verify the operation of a new or
replacement part.
If the storage system is running Navisphere Express, use Navisphere Express to verify the
operation of a new or replacement part.
If the storage system is running Navisphere Manager, use Navisphere Manager to verify
the operation of a new or replacement part.
Note: All AX4-5 series storage systems ship with Navisphere Express installed. To use Navisphere
Manager, you need to upgrade your storage system to Navisphere Manager.
Verify the operation of a new or replacement part using Navisphere
Express
1. In a browser on a network-connected host, start Navisphere® Express for the storage
system 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 working
properly.
If fault lights on storage system are still lit, go to the Celerra Tools page on the
http://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 on
the size of the disk, how much data is on the disk, and whether I/O is running during the
rebuild, this process can take from a few minutes to many hours. If Navisphere Manager is
installed on the storage system, you can determine the progress of the rebuild process from
Navisphere Manager by viewing the properties for a LUN containing the replacement disk.
The Percent Rebuilt entry on the LUN Properties dialog box displays either the percentage
of the rebuild completed during the rebuild process and 100% when the process is complete.
14 Replacing a Disk Module
Verifying the operation of a new or replacement part

15. Verifying the operation of a new or replacement part using Navisphere
Manager
1. Start Navisphere® Manager for the storage system by entering the IP address in a browser
window.
2. In the Navisphere Manager Storage tree, locate the icon for the storage system in which
you installed or replaced the part, expand the storage-system icon, and select the Physical
icon.
3. Expand the enclosure in which you installed or replaced the part, and navigate to the
part.
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 the
http://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 on
the size of the disk, how much data is on the disk, and whether I/O is running during the
rebuild, this process can take from a few minutes to many hours. You can determine the
progress of the rebuild process from or Navisphere Manager by viewing the properties for
a LUN containing the replacement disk. The Percent Rebuilt entry on the LUN Properties
dialog box displays either the percentage of the rebuild completed during the rebuild process
and 100% when the process is complete.
Verifying the operation of a new or replacement part using Navisphere Manager 15
Verifying the operation of a new or replacement part

16. 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_checkup
Check Version: <NAS_version>
Check Command: /nas/bin/nas_checkup
Check Log : /nas/log/checkup-run.100128-181007.log
-------------------------------------Checks-------------------------------------
Control Station: Checking if file system usage is under
limit.............. Pass
Control Station: Checking if NAS Storage API is installed
correctly........ Pass
Control Station: Checking if NBS clients are
started....................... Pass
Control Station: Checking if NBS configuration
exists...................... Pass
Control Station: Checking if NBS devices are
accessible.................... Pass
Control Station: Checking if NBS service is
started........................ Pass
Storage System : Checking for unsupported storage
profile.................. Pass
Storage System : Checking if Fibre Channel zone checker is set
up.......... N/A
Storage System : Checking if Fibre Channel zoning is
OK.................... N/A
Storage System : Checking if proxy arp is
setup............................ Pass
Storage System : Checking SPA SPB
communication............................ Pass
--------------------------------------------------------------------------------
If the output of the nas_checkup command indicates any problems, correct the problems
and re-do the command before continuing.
16 Replacing a Disk Module
Checking system status

17. Returning the failed part
Ship the failed part to your service provider as described in the instructions that were
included with the replacement part.
Returning the failed part 17
Returning the failed part

18. Copyright © 2008 - 2010 EMC Corporation. All rights reserved.
Published September 2010
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18 Replacing a Disk Module