Nexsan Unity Maintenance Manual

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HYPER-UNIFIED STORAGE

Nexsan Unity

Hardware Maintenance Guide

Firmware Version Unity v. 5.1

NEXSAN | 325 E. Hillcrest Drive, Suite #150 | Thousand Oaks, CA 91360 USA

Printed Wednesday, January 02, 2019 | www.nexsan.com

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Trademarks

Nexsan® is a trademark or registered trademar k of Nexsan Technologies, Inc. The Nexsan logo is a registered trademark of Nexsan Technologies, Inc.

Allother trademarks and registered trademarks are the property of their respective owners.

Patents

This pr oduct isprotected by one or more of the following patents, and other pending patent applications worldwide:

United States patents US8,191,841, US8,120,922;

United Kingdom patents GB2466535B, GB2467622B, GB2467404B, GB2296798B, GB2297636B

About this document

Unauthorized use, duplication, or modification of this document in whole or in part without the written consent of Nexsan Corporation is strictly prohibited. Nexsan Technologies, Inc. reserves the right to make changes to this manual, as well as the equipment and software described in this manual, at any time without notice. This manual may contain links to Web sites that were current at the time of publication, but have since been moved or become inactive. It may also contain links to sites owned and operated by third parties. Nexsan is not responsible for the content of any such third-party site.

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Contents

Contents 3

Chapter 1: Customer-Replaceable Units: Class 1 9

ESD protection 10 Disk drives 11

Identifying failed disk drives 11

Data disk failures 11

FASTier disk failures 16 Replacing data disks 18 Replacing FASTier drives 22

Power supply units (PSUs) 25

Identifying failed power supply units (PSUs) 25 Replacing a standard PSU 28 Replacing a US 460 PSU 30

SFPs 33

Chapter 2: Customer Replaceable Units: Class 2 35

Unity Storage Expansion controllers 36

Identifying a failed controller 36

Check the front panel LEDs for controller errors 36

Identify the controller numbers using the CLI 37

Desc ription 37

Controller 37

Syntax 37

Options 37

Example 37

Replacing a Unity Storage Expansion controller 39

System sub-components 41 Fans 43

Replacing a fan 43

Chapter 3: Customer Replaceable Units: Class 3 53

Unity Storage System controllers 54

Replacing a Unity Storage System controller 54

Chapter 4: Support-Assisted FRUs: Class 2 57

DIMMs 58 Identifying a failed DIMM 58

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Contents

Chapter 5: Support-Assisted Replacements: Class 3 59

Chassis 60

Identifying a failed chassis 60 Replacing a chassis 60

System SSDs 64

Replacing the FASTier Cache SSD 64 Replacing the OS SSD 68

Record system settings 68

Back up the old OS SSD 68

Install the new OS SSD 68

Transfer data to the new OS SSD 71

Re-enter IPMI settings 71

Replace and restore the OS SSD on the other unit 72

SATADom 72

Replacing a SATADom 72

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About this document

This Hardware Maintenance Guide provides information and detailed procedures for the removal and replacement of these Nexsan Unity Unity 2.0/5.0 Hardware systems:

Nexsan Unity 2200™ Storage System

Nexsan Unity 4400™ Storage System

Nexsan Unity 6900™ Storage System

Nexsan Unity 2200X™ Storage Expansion

Nexsan Unity Storage 224X™ Expansion

Nexsan Unity Storage 316X™ Expansion

Nexsan Unity Storage 424X™ Expansion

Nexsan Unity Storage 460X™ Expansion

The replacement procedures are considered either Customer-Replaceable Units (CRUs) or support-assisted Field-Replaceable Units (FRUs). CRUs can be performed without any assistance whereas support-assisted FRUs always require help from Nexsan Technical Support. All procedures are rated based on the associated risk to the system should the procedure not be followed correctly. Class 1 procedures have the lowest associated risk and Class 3 procedures have the highest associated risk. Below are the classes used in this manual to group procedures:

CRU: Class 1

CRU: Class 2

CRU: Class 3 (highest risk)

FRU: Class 1

FRU: Class 2

FRU: Class 3 (highest risk)

Contact Nexsan Support for assistance if you identify issues with any of the following components:

HBA cards

CPUs

DIMMs

NVDIMMs

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About this document

Audience

This guide has been prepared for the following audience:

Any qualified NST/Unityadministrator.

Conventions

Here is a list of text conventions used in this document:

Convention Description

underlined blue

boldface Text that refers to labels on the physical unit or interactive items in the graphical user

monospace

monospace bold

italics System messages and non-interactive items in the graphical user interface (GUI)

Cross-references, hyperlinks, URLs, and email addresses.

interface (GUI).

Text that is displayed in the command-line interface (CLI) or text that refers to file or directory names.

Text strings that must be entered by the user in the command-line interface or in text fields in the graphical user interface (GUI).

References to Software User Guides

Notes, Tips, Cautions, and Warnings

Note Notes contain important information, present alternative procedures, or call attention to certain items.

Tip Tips contain handy information for end-users, such as other ways to perform an action.

CAUTION: In hardware manuals, cautions alert the user to items or situations which may cause

damage to the unit or result in mild injury to the user, or both. In software manuals, cautions alert the user to situations which may cause data corruption or data loss.

WARNING: Warnings alert the user to items or situations which may result in severe injury or death to the user.

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About this document

Contacting Nexsan

For questions about Nexsan products, please visit the Nexsan support Web page, and the Nexsan Unity

Documents and Downloads page. If you are unable to find the answer to your question there, please see our

contact information below.

Service and support

Nexsan's Technical Services Group provides worldwide assistance with installation, configuration, software support, warranty, and repair for all Nexsan products. A variety of service and support programs are available to provide you with the level of coverage and availability your operation requires.

Nexsan Unity Documents & Downloads page:

https://helper.nexsansupport.com/unt_ downloads.html

Unity Online Help page:

https://helper.nexsansupport.com/unt_ onlinehelp.html

Contact Nexsan Unity support:

https://helper.nexsansupport.com/unt_support

Worldwide Web site:

www.nexsan.com

Chapter 1:Customer-Replaceable Units: Class 1

Class 1 CRUs - The following components of the Nexsan Unity Storage Systems are replaceable by the customer without assistance from Technical Support and have little associated risk of causing a complete or partial system failure if the documented replacement procedure is followed correctly. However, if you are unsure about a specific step or process, please contact Nexsan Support for assistance.

This chapter contains the following sections:

ESD protection 10

Disk drives 11

Power supply units (PSUs) 25

SFPs 33

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ESD protection

CAUTION: Computer components and disk drives are sensitive to electrostatic discharge (ESD). Follow all appropriate anti-static procedures to prevent damage to your equipment or components.

► To prevent ESD damage:

Use the anti-static wrist-strap shipped with Unity whenever you are performing maintenance on the Unity Storage System.

Figure 1-1: Using the anti-static wrist strap

Before touching components with your hands or with any tools, and before removing any components from their anti-static bags, ground any electrostatic charge from your person by touching a grounded metal object.

Handle printed circuit boards by their edges only. Do NOT touch any of a board’s components, chips, modules, or contacts.

When handling replaceable components, do NOT touch any exposed pins or contacts.

Place components and modules into their anti-static bags when they are not in use.

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Chapter 1: Customer-Replaceable Units: Class 1

Disk drives

Disk drives (either data drives or FASTier drives) are mounted in drive carriers to simplify their installation and removal from the chassis.

CAUTION: Disk drive carriers help promote proper airflow for drives. For this reason, even empty carriers without disk drives installed MUST remain in the chassis.

Identifying failed disk drives

If a disk drive fails, the Unity Storage System software interfaces and enclosures display the appropriate warnings.

Data disk failures

Firstly, when a disk fails, a warning is displayed on the Unity Storage System Dashboard panel.

Figure 1-2: Data disk failure error popup

Also, one of two other indicators appears:

If a spare disk is available, the Tasks in Progress dialog displays a “resilvering” process, which means that the spare disk is being configured as a replacement for the failed disk.

Note It can take several hours to several days for the disk resilvering process to complete, depending on how

much data needs to be copied to the spare disk.

If there is no spare disk available, the Storage Pool node also displays a failure icon.

Secondly, the disk LEDs on the front of the Unity Storage System indicate which disk has failed.

A steady red LEDon a drive indicates failure.

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Disk drives

Figure 1-3: Example drive LEDs:Unity 2200 (left) and US 460

► Troubleshooting

On the Unity navigation bar, click System >Troubleshoot to display the troubleshooting popup, which contains more information about each Issue that the Unity System is currently experiencing, and resolution steps.

Figure 1-4: Troubleshooting information

► Check Event Viewer

On the Unity navigation bar, click System >Event Viewer. The Event Viewer includes Critical, Warning, Error, and optionally Information events. Click a link to an event to display a popup of the information.

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Figure 1-5: Event log entry for failed disk

Figure 1-6: Event log entry indicating that the disk (array) has been rebuilt

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Disk drives

Figure 1-7: Event log entry for a degraded storage pool

In the command-line interface (CLI), run the drives command. The number of the drive bay where the failed disk is installed will be missing from the list.

Example, with “Slot 5” missing, indicating the failed disk:

ES260768-176-01:A:/>drives Enumerating drives... Drives in NST5100 (Chassis ID 100000001, Slots: 16)

* Slot 1: ATA-INTEL-SSDSA2CW30 0362 (Serial: XXXXXXX, Size: 300 GB) * Slot 2: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 3: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 4: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 6: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 7: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 8: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 9: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 10: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 11: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 12: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 13: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 14: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 15: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 16: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB)

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When you have all required information, including the specific drive bay that the failed disk occupies, proceed to Replacing data disks on page18.

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Disk drives

FASTier disk failures

When a FASTier disk fails,

a warning is displayed on the Unity Storage System Dashboard panel. Click the Warning icon , displayed beside the Unity System name for details, as shown here:

Figure 1-8: FASTier disk failure error popup

the disk LEDs on the front of the unit indicate which disk has failed. See Figure 1-3

► For more information about the failed FASTier disk:

Do one or more of the following:

Open the Event Viewer to display system events. Click an event to open a detail dialog with additional information.

Figure 1-9: Event log entry for failed FASTier disk

Note Because there is no other Unity notification of a failed FASTier drive, it is highly recommended that you

configure Unity to send an e-mail whenever a CRITICAL event occurs so that you are notified in the event of a FASTier failure. See "Event logging and notification" in the Nexsan Unity Software User Guide.

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In the command-line interface (CLI), run the drives command to display information about the disk failure.

Example, with “Slot 1” missing, indicating the failed FASTier™ disk:

ES260768-176-01:A:/>drives Enumerating drives... Drives in NST5100 (Chassis ID 100000001, Slots: 16)

* Slot 2: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 3: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) * Slot 4: SEAGATE-ST32000444SS 0006 (Serial: XXXXXXX, Size: 2.0 TB) . . .

When you have all required information, including the specific drive bay that the failed disk occupies, proceed to Replacing FASTier drives on page22.

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Disk drives

Replacing data disks

It is always recommended that you replace failed disk drives immediately to ensure that the system has an adequate number of spare drives.

► To replace a failed data drive:

1. Press the release switch down to unlatch the drive extraction lever. The lever pops out.

Figure 1-10: Unlatching the extraction lever

2. Using the drive extraction lever, pull the disk drive out approximately 1/2 to 1 inch, then grasp the drive carrier body and remove the drive the rest of the way.

Figure 1-11: Removing the disk drive

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3. Remove the drive carrier from the failed disk and attach it to the new disk.

Figure 1-12: Drive carrier screw locations

Figure 1-13: US 460

CAUTION: ALWAYS put replacement disk drives into the slot from which the failed disk drives were removed. Do NOT move disk drives between slots.

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Disk drives

4. Install the new disk drive:

a. Line up the carrier guides with the guides on the front of the Nexsan Unity chassis and slide the disk

drive into the slot.

b. Hook the top of the extraction handle onto the lip of the chassis.

Figure 1-14: Installing the new disk drive

c. Press the extraction handle until it clicks into place.

Figure 1-15: Latching the new disk into place

The appropriate disk LED lights up green to let you know that the disk is operating properly.

If the storage pool had an available spare, the new disk is configured as a spare. The failure icons in Unity are cleared and the Event Viewer shows that the disk has been restored.

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Figure 1-16: Event indicating that a disk (array) has been rebuilt

If the storage pool did not have an available spare, the new disk is “resilvered” and built into the storage pool (see Identifying failed disk drives on page11). Resilvering can take several hours to several days.

When all failure conditions are addressed (the disk is replaced, resilvering is complete, and the storage pool is operating normally), the Event Viewer indicates this.

Note In some cases, the storage pool error (see Identifying failed disk drives on page11) is not automatically

cleared when the resilvering process is complete. In such cases, perform the following procedure:

► To clear the storage pool error after disk resilvering is complete:

1. On the Unity navigation bar, select Storage > Storage Pools.

2. Click the link to the pool that displays the error.

3. Check the Attempt to clear error state check box and click OK.

Figure 1-17: Attempt to clear error state check box

The storage pool error is cleared.

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Disk drives

Replacing FASTier drives

► To replace a failed FASTier drive:

1. First you must remove the failed FASTier drive from the storage pool to which it is assigned:

a. On the Unity navigation bar, select Storage > Storage Pools.

b. Click the link to the pool that the FASTier disk is assigned to.

c. Select Summary >FASTier Cache.

Unity displays the number of available FASTier devices on the system. This number is the number of installed FASTier disks, minus one.

d. Make the appropriate FASTier cache assignments, either READor WRITE, depending on your

system and disk options. See "FASTier caching by storage system" in the Unity Software User Guide.

e. Click the Apply button.

2. Press the latch switch down to unlatch the drive extraction lever. The lever pops out.

Figure 1-18: Unlatching the extraction lever

3. Using the drive extraction lever, pull the disk drive out approximately 1/2 to 1 inch, then grasp the drive carrier body and remove the drive the rest of the way.

Figure 1-19: Removing the FASTier drive

CAUTION: ALWAYS put replacement disk drives into the slot from which the failed disk drives were removed. Do NOT move disk drives between slots.

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4. Remove the drive carrier from the failed disk and attach it to the new disk.

Figure 1-20: Example drive carrier screw locations

Note US 460 Expansions do not use drive carriers for each drive.

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Disk drives

5. Install the new disk drive:

a. Line up the carrier guides with the guides on the front of Unity chassis and slide the disk drive into

the slot.

b. Hook the bottom of the extraction handle beneath the lip of the chassis.

Figure 1-21: Installing the new FASTier drive

c. Press the extraction handle until it clicks into place.

Figure 1-22: Latching the FASTier disk into place

An event is recorded in the event log and can be accessed in the Event Viewer.

6. Assign the new FASTier drive to the storage pool that the old FASTier drive was assigned to.

a. On the Unity navigation bar, select Storage > Storage Pools.

b. Click the link to the pool that the FASTier disk is assigned to.

c. Select Summary >FASTier Cache.

Unity displays the number of available FASTier devices on the system. This number is the number of installed FASTier disks, minus one.

d. Make the appropriate FASTier cache assignments, either READor WRITE, depending on your

system and disk options. See "FASTier caching by storage system" in the Unity Software User Guide.

e. Click the Apply button.

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Power supply units (PSUs)

Unity Storage Systems include redundant power supply units (PSUs). In case one fails, the unit can continue to operate for a brief period using only the power from the other PSU.

Note The cooling fans in each PSU operate on separate circuits from the power supply itself. If one PSU fails,

its fans continue to run on power supplied by the other PSU.

CAUTION: When a failed PSU is removed, ALWAYS replace it as soon as possible. Two functional PSUs are necessary to maintain proper operation and cooling for the unit.

Identifying failed power supply units (PSUs)

A failed power supply unit (PSU) is indicated by a critical error icon at the top of the Unity Dashboard. Click the icon for details.

Figure 1-23: Power supply failure error from the Dashboard

On most Unity systems, the front-panel power failure LED corresponding to the failed PSU is illuminated, and the status LED on the back of the PSU is either red or off.

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Power supply units (PSUs)

Standard power failure LED (left) and PSU status LED (right)

US460 front power LED(left) and rear ACInput LED

Note If the front chassis power failure LED is flashing rather than steadily lit up, this indicates a fan failure

rather than a PSU failure. See Fans on page43.

► For more information about the failed PSU, do one or more of the following:

On the Unity navigation bar, click System >Troubleshoot to display the troubleshooting popup, which contains more information about the PSU failure.

Figure 1-24: Troubleshooting popup

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Check Event Viewer: On the Unity Dashboard , click Events to open the Event Viewer, with links to Critical, Warning, Error, and Information events.

Figure 1-25: Event log entry for failed PSU

In the command-line interface (CLI), run the sensors command to display information about the failure.

Example, with Power Supply (right from front) showing a status of “down”

Sensors for E5110 chassis: ERROR * Power Supply(right from front) (discrete): down

* Power Supply(left from front) (discrete): normal

* Temperature (right from front) (temperature): normal [30 C]

* Temperature (left from front) (temperature): normal [35 C]

* 5V supply voltage (voltage): unknown [0.00V]

* 12V supply voltage (voltage): unknown [0.00 V]

* 5V supply current (misc): unknown

* 12V supply current (misc): unknown

When you have all required information, including the specific power supply unit that has failed, continue with the appropriate replacement procedure.

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Power supply units (PSUs)

Replacing a standard PSU

► To replace a standard PSU:

1. Remove the power cord from the failed PSU.

Figure 1-26: Removing the power cord

2. Fold down the extraction handle and press the latch tab inward, to the left.

Figure 1-27: Unlatching the PSU

3. Gently pull the extraction handle and remove the PSU from the slot, supporting its weight with your other hand.

Figure 1-28: Removing the PSU

4. Orient the replacement PSU so that the latch tab is on the right.

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5. Guide the new PSU into the slot and slide it in until it is fully seated.

Figure 1-29: Installing the new PSU

CAUTION: Make certain that the power supply unit is FULLY SEATED before applying power.

6. Place the power cord in the power socket on the PSU.

Figure 1-30: Applying power to the PSU

The PSU Status LED lights up green to let you know that the new PSU is working properly, and the power fail LED on the front of the unit turns off. Also, an event is recorded in the event log and can be accessed in the Event Viewer. To open Event Viewer, on the Unity Dashboard, click Events.

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Power supply units (PSUs)

Figure 1-31: Event indicating that the PSU has returned to an acceptable range

Replacing a US 460 PSU

► To replace a US 460 PSU:

1. Remove the power cord from the failed PSU.

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2. Fold down the extraction handle.

Figure 1-32: Unlatching the PSU

3. Gently pull the extraction handle and remove the PSU from the slot, supporting its weight with your other hand.

4. Guide the new PSU into the slot and slide it in until it is fully seated.

CAUTION: Make certain that the power supply unit is FULLY SEATED before applying power by plugging in the unit.

5. Place the power cord in the power socket on the PSU.

Figure 1-33: Applying power to the PSU

The PSU Status LED lights up green to let you know that the new PSU is working properly, and the power LED on the front of the unit turns green. Also, an event is recorded in the event log and can be accessed in the Event Viewer. On the Unity Dashboard , click Events to open the Event Viewer.

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Power supply units (PSUs)

Figure 1-34: Event indicating that the PSU has returned to an acceptable range

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SFPs

SFPs (small form pluggable) ports on the Fibre Channel can be individually replaced in case of failure. This procedure only applies to Unity Storage Systems equipped with Fibre Channel cards.

CAUTION: Only perform this procedure if the system is wired for redundancy. This is to avoid loss of network connectivity or access to external storage.

► To replace SFPs on a Fibre Channel:

1. Remove the cable from the SFP connector.

2. Fold down the small extraction handle on the SFP, then gently pull the SFP out of the slot.

Figure 1-35: Removing the SFP

3. Orient the new SFP so that the extraction handle points up.

4. Gently slide the new SFP into the slot until it is fully seated.

Figure 1-36: Replacing the SFP

5. Attach the cable you removed in Step 1 to the new SFP connector.

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SFPs

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Chapter 2

Chapter 2:Customer Replaceable Units: Class 2

Class 2 CRUs - The following components of Nexsan Unity are replaceable by the customer, typically without assistance from Technical Support, but do have some associated risk of causing a complete or partial system failure if the documented replacement procedure is not followed correctly. If you are unsure about a specific step or process, please contact Nexsan Support for assistance.

This chapter contains the following sections:

Unity Storage Expansion controllers 36

System sub-components 41

Fans 43

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Unity Storage Expansion controllers

When one Unity Storage Expansion controller fails, its resources (Pool Resource Group and storage pools) are migrated to the remaining Unity Storage Expansion controller automatically.

Identifying a failed controller

A failed controller in a storage system is indicated in Unity by error in the Cluster Status section of the Dashboard panel.

Figure 2-1: Controller failure icons

Check the front panel LEDs for controller errors

► For all Unity Storage Systems

The heartbeat LED turns red.

Figure 2-2: Controller fault LED indicators

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Identify the controller numbers using the CLI

You can identify the controller numbers using the Unity nxcmd command-line interface.

► To display controller number:

Enter the nics command in the nxcmd CLI.

Description This command displays the physical locations of the network ports on the current

Controller node.

Controller Run this command on the controller where the network ports you wish to view information

for are located.

Syntax

Options None

Example

For details, consult the Nexsan Unity nxcmd Command Line Interface Reference Guide, available from the Nexsan.com Unity support page.

nics

System Chassis : Unity 2200

System Node # : 2

igb0 : 1000 RJ45 - 1G Copper Network Port

onboard, first port from the left

igb1 : 1000 RJ45 - 1G Copper Network Port

onboard, second port from the left

igb2 : 1000 RJ45 - 1G Copper Network Port

onboard, third port from the left

igb3 : 1000 RJ45 - 1G Copper Network Port

onboard, fourth port from the left

► For more information about the failed controller:

1. Check Event Viewer: On the Unity Dashboard , click Events to open the Event Viewer, which displays Critical, Warning, and Error events. Click Error events to list Controller events.

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Unity Storage Expansion controllers

Figure 2-3: Event log entry for failed controller

2. On the Unity navigation bar, click System >Troubleshoot to display the troubleshooting window, which contains more information about the controller failure.

Figure 2-4: The troubleshoot popup

When you have all required information, including the specific controller that has failed, continue with the appropriate replacement procedure.

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Replacing a Unity Storage Expansion controller

► To replace a failed Unity Storage Expansion controller:

1. Remove the SAS cables from the failed controller, being sure to label each SAS cable with the number of the SAS port to which it was attached.

2. For standard controllers, remove the retaining bolt on the controller that needs to be replaced. See

Replacing a Unity Storage System controller on page54.

3. For the US 460 Expansion, remove the controller retaining bolt.

Figure 2-5: US 460 Expansion controller retaining bolt

4. Pull down the extraction handle to disengage the controller from the unit, then gently pull the controller out of the chassis, supporting its weight with the other hand.

Figure 2-6: Removing the Unity Storage Expansion controller

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Unity Storage Expansion controllers

5. Guide the new controller into the slot and slide it in until some resistance is met, then push the extraction handle up to seat the controller.

Figure 2-7: Inserting the new Unity Storage Expansion controller

6. Re-secure the controller retaining bolt.

a. For standard controllers, see Replacing a Unity Storage System controller on page54.

b. For the US 460 Expansion, fasten the controller retaining bolt.

7. Replace the SAS cables on the new controller, being sure to put all cables back into the proper ports. See Step 1.

8. Open Unity and verify that the new controller is being recognized by the system. See Navigating Unity in the Nexsan Unity hardware Reference Guide.

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System sub-components

Standard Unity Storage System controllers contain the following field-replaceable units:

Fans on page43

System SSDs on page64

SATADom on page72

To replace any of the sub-components, the failed component must be identified, the cluster’s resources migrated to the other cluster in the system, and the storage system or controller shut down.

Note For US 460 Expansions, the sub components described in this section are not individually replaceable.

The entire canister is replaced. Please contact Nexsan Support for assistance.

► To prepare a Unity Storage System for sub-component replacement, do the following:

1. For Fans, use the sensors command in the command-line interface (CLI). See Accessing the nxadmin CLI and Using the nxadmin CLI’s command-based shell in the Unity CLI Reference Guide.

Example, showing Lower Fan 3 status as “down [0.0 RPM]”:

Node: ES200030-001-02 Location: left (from the front) Sensors for E5110:

* CPU 1 status (discrete): normal

* CPU 2 status (discrete): normal

* CPU 1 core voltage (voltage): normal [1.01 V]

* CPU 2 core voltage (voltage): normal [1.02 V]

* Lower Layer Fan 1 (fan): normal[9384 RPM]

* Lower Layer Fan 2 (fan): normal[9384 RPM]

ERROR * Lower Layer Fan 3 (fan): down [0.00 RPM]

* Upper Layer Fan 1 (fan): normal [7680 RPM]

* Upper Layer Fan 2 (fan): normal [8160 RPM]

* Upper Layer Fan 3 (fan): normal [8400 RPM]

2. Once you identify the failed component, migrate cluster resources from the cluster containing the failed component to the other cluster using Unity. See Moving Cluster Resources in the Nexsan Unity Software User Guide for details.

3. Shut down the unit or controller node containing the failed component through Unity. See Shutting down the cluster or individual cluster nodes in the Nexsan Unity Software User Guide.

4. Remove all communication cables from the unit or controller containing the failed component.

Note Be sure to label each cable with the name and number of the port to which it was attached.

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System sub-components

5. Unscrew the retaining bolt on the controller’s extraction handle. See step 3 in Replacing a Unity Storage

System controller on page54.

6. Pull down the extraction handle to disengage the controller from the unit, then gently pull the controller out of the chassis, supporting its weight with the other hand. See Replacing a Unity Storage System

controller on page54.

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Fans

Unity Storage System fans are essential for maintaining proper internal temperature and should be replaced immediately if found to be faulty.

A failed fan usually causes a temperature warning LED on the front panel to light up.

Replacing a fan

RAID Unity Storage Systems have six fans per controller: three on the motherboard (designated Lower Layer) and three on raised brackets (designated Upper Layer).

Figure 2-8: Locations of fans in a controller

► To replace an upper layer fan

1. Perform the component identification, migrate cluster resources, and controller removal steps under

System sub-components on page41.

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Fans

2. Gently lift the fan from its slot.

Figure 2-9: Removing upper layer fans

3. If necessary, snip the pull ties holding the fan’s power wires to the chassis.

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4. Unclip the retaining tab on the power plug and gently remove it from the socket.

Figure 2-10: Disconnecting the fan’s power plug

5. Insert the power plug for the replacement fan into the socket and gently press until the retaining tab clicks.

6. If necessary, re-secure the power wires with new pull ties.

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Fans

7. Gently place the replacement fan into the slot. Press firmly down to ensure that it is properly seated.

Figure 2-11: Replacing upper layer fans

8. Guide the controller into the slot and slide it in until some resistance is met, then push the extraction handle up to seat the controller. See Replacing a Unity Storage System controller on page54.

9. Re-secure the extraction handle retaining bolt. See Replacing a Unity Storage System controller on page54.

10. Replace all cables on the new controller.

Notes: Be sure to put all cables back into the proper ports. See Step 4 under System sub-components

on page41.

If the controller does not automatically start up, select it in Unity and click the Turn On button in its Properties panel at the bottom of the screen.

11. Verify that the new fan is working using the sensors command in the command-line interface (CLI). See

Accessing the nxadmin CLI and Using the nxadmin CLI’s command-based shell in the Nexsan Unity CLI reference Guide.

12. Migrate the resources back to the controller you removed using Unity. See Moving Cluster Resources in the Nexsan Unity Software User Guide.

► To replace the lower layer fan 1:

1. Perform the component identification and controller removal steps under System sub-components on page41.

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2. Unscrew and remove the bracket holding the upper layer fans in place. Set it aside.

Figure 2-12: Removing the fan bracket

3. Gently lift the fan from its slot.

Figure 2-13: Removing Lower Layer Fan 1

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Fans

4. Unclip the retaining tab on the power plug and gently remove it from the socket.

Figure 2-14: Disconnecting the fan’s power plug

5. Insert the power plug for the replacement fan into the socket and gently press until the retaining tab clicks.

6. Gently place the replacement fan into the slot. Press firmly down to ensure that it is properly seated.

Figure 2-15: Replacing Lower Layer Fan 1

7. Line up the notches in the sides of the bracket with the tabs on the controller.

Figure 2-16: Lining up the bracket for replacement

8. Re-secure the bracket with the screws you removed in Step 2.

9. Guide the controller into the slot and slide it in until some resistance is met, then push the extraction handle up to seat the controller. See Replacing a Unity Storage System controller on page54.

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10. Re-secure the extraction handle retaining bolt. See Replacing a Unity Storage System controller on page54.

11. Replace all cables on the new controller.

Notes: Be sure to put all cables back into the proper ports. See Step 4 under System sub-components

on page41.

If the controller does not automatically start up, select it in Unity and click the Turn On button in its Properties panel at the bottom of the screen.

12. Verify that the new fan is working using the sensors command in the command-line interface (CLI). See

Accessing the nxadmin CLI and Using the nxadmin CLI’s command-based shell in the Nexsan Unity CLI Reference Guide.

13. Migrate the resources back to the controller you removed using Unity. See Moving Cluster Resources in the Nexsan Unity Software User Guide.

► To replace a lower layer fan 2 or 3 (Unity 2200 or Unity 2200X):

1. Perform the component identification and controller removal steps under System sub-components on page41.

2. Remove Upper Layer Fan 1, but do not detach it from power (see Replacing a fan on page43, far left photograph). Set it aside.

3. If necessary, unscrew the fan bracket from the back of the controller and remove it.

Figure 2-17: Removing the fan bracket

4. Gently lift the fan from its slot.

Figure 2-18: Removing Primary Fan 2 or 3

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5. Snip the pull ties holding the fan’s power wires to the chassis.

6. Unclip the retaining tab and gently remove the power plug from the socket.

Figure 2-19: Disconnecting the fan’s power plug

7. Insert the power plug for the replacement fan into the socket and gently press until the retaining tab clicks.

8. Re-secure the power wires with new pull ties.

9. Gently place the replacement fan into the slot. Press firmly down to ensure that it is properly seated.

Figure 2-20: Replacing Primary Fan 2 or 3

10. If necessary, replace the fan bracket.

11. Replace Secondary Fan 1 (see Replacing a fan on page43, far left photograph). Press firmly down to ensure that it is properly seated.

12. Guide the controller into the slot and slide it in until some resistance is met, then push the extraction handle up to seat the controller. See Replacing a Unity Storage System controller on page54.

13. Re-secure the extraction handle retaining bolt. See Replacing a Unity Storage System controller on page54.

14. Replace all cables on the new controller.

Notes: Be sure to put all cables back into the proper ports. See Step 4 under System sub-components

on page41.

If the controller does not automatically start up, select it in Unity and click the Turn On button in its Properties panel at the bottom of the screen.

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15. Verify that the new fan is working using the sensors command in the command-line interface (CLI). See the Nexsan Unity nxadmin CLI Reference Guide.

16. Migrate the resources back to the controller you removed using Unity. See Moving Cluster Resources in the Nexsan Unity Software User Guide.

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Fans

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Chapter 3

Chapter 3:Customer Replaceable Units: Class 3

Class 3 CRUs - The following components of the Nexsan Unity Storage Systems are replaceable by the customer, typically without assistance from Technical Support, but do have a high associated risk of causing a complete or partial system failure if the documented replacement procedure is not followed correctly. If you are unsure about a specific step or process, please contact Nexsan Support for assistance.

This chapter contains the following sections:

Unity Storage System controllers 54

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Unity Storage System controllers

When one Unity Storage System controller fails, its resources (Pool Resource Group and storage pools) are migrated to the remaining Unity Storage System controller automatically.

Replacing a Unity Storage System controller

► To replace a Unity Storage System controller:

1. Shut down the failed controller through Unity. See Shutting down the cluster or individual cluster nodes in of the Nexsan Unity Software User Guide for details.

2. Remove all cables from the failed controller, being certain to label each with the name and number of the port to which it was attached.

3. Unscrew the retaining bolt on the extraction handle of the controller that needs to be replaced.

Figure 3-1: Unscrewing the controller retaining bolt (standard expansions)

4. Pull down the extraction handle to disengage the controller from the unit, then gently pull the controller out of the chassis, supporting its weight with the other hand.

Figure 3-2: Removing the Unity Storage System controller

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5. Remove all SFPs, HBA cards, DIMMs, and the SATADom from the failed controller and install them into the same slots on the replacement controller. See SFPs on page33, and SATADom on page72 for details.

You MUST install the HBA cards into the same slots on the replacement controller as they occupied on the failed controller.

CAUTION: Be certain to press the metal clip on the side of the SATADom inward to unlatch it before removing the SATADom. Failure to do so may cause for the clip to break.

CAUTION: Be sure that the SATADom power cable wires are clear of the edge of the controller. Failure to do so may result in damage to the wires when the controller is replaced.

Figure 3-3: Locations of HBA cards, SFPs, DIMMs, and the SATADom

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6. Guide the new controller into the slot and slide it in until some resistance is met, then push the extraction handle up to seat the controller.

Figure 3-4: Inserting the new controller

7. Re-secure the extraction handle retaining bolt. See Replacing a Unity Storage System controller on page54.

8. Replace all cables on the new controller, being sure to put all cables back into the proper ports. See Step2.

9. Open Unity and verify that the new controller is being recognized by the system. See "Finding Unity features" in the Nexsan Software User Guide.

Notes: If the controller does not automatically start up, select it inUnity and click the Turn On button in

its Properties panel at the bottom of the screen.

It may take a few minutes for the new controller to fully start up.

10. Reconfigure the IPMI settings for the controller. See "Setting or modifying IPMI settings" in the Nexsan Unity Software User Guide.

11. Migrate the failed controller’s resources to the new controller in Unity. See Moving Cluster Resources in the Nexsan Unity Software User Guide.

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Chapter 4

Chapter 4:Support-Assisted FRUs: Class 2

Class 2 Support-Assisted FRUs - The following components of the Nexsan Unity Storage Systems are replaceable only with assistance from Nexsan Support as they have some associated risk of causing a complete or partial system failure. Please contact Nexsan Support if one of the following components has failed.

This chapter contains the following sections:

DIMMs 58

Identifying a failed DIMM 58

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DIMMs

Dual in-line memory modules (DIMMs) supply the random-access memory (RAM) for Unity. In cases of failure, they can be replaced.

Note A failed DIMMaffects the entire controller, but replacement of a DIMMcan only be done by Nexsan

Support Group. Please contact Nexsan Support immediately if you suspectz a failed DIMM in your Unity Storage Systems.

Identifying a failed DIMM

DIMM failure can be difficult to diagnose without the assistance of Nexsan Support; however, the following may help you identify a potentially failed DIMM:

If you have autolog enabled, the analyzer will likely detect a failed DIMM.

If you are familiar with the amount of RAMthat you have, run the top command in the command line interface (CLI)to see if the amount is lower than you think it should be. See Accessing the nxadmin CLI and Using the nxadmin CLI’s command-based shell in the Unity CLI Reference Guide. You can also check if the amount of RAMis comparatively lower than the other controller.

A failed DIMM often causes a drop in the system's performance.

Note It is possible for DIMMs to only partially fail. In this case, the top command in the nxadmin CLI may not

show lower RAMlevels and there may not be a visible drop in performance. However, seemingly random failures and system crashes will likely still occur and are important signs of DIMM failure.

If you suspect DIMM failure, contact Nexsan Support for assistance.

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Chapter 5

Chapter 5:Support-Assisted Replacements: Class 3

Class 3 Support-Assisted FRUs - The following components of the Nexsan Unity Storage Systems are replaceable only by qualified Nexsan Support personnel as they have a high associated risk of causing a complete or partial system failure. Please contact Nexsan Support if one of the following components has failed.

This chapter contains the following sections:

Chassis 60

System SSDs 64

SATADom 72

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Chassis

Use this procedure to diagnose whether the Unity System has a failed chassis.

Identifying a failed chassis

Only Nexsan Support is able to officially diagnose a chassis as failed. If you suspect a failed chassis please first ensure that no other component may be responsible for the failure; see:

Identifying failed disk drives on page11

Identifying a failed DIMM on page58

Identifying a failed controller on page36

If you have eliminated the possibility of failure in any other component, please contact Nexsan Support for assistance.

Replacing a chassis

This procedure is only to be followed if the chassis was officially diagnosed as failed by Nexsan Support. For more information, see Identifying a failed chassis above.

► To remove a chassis:

CAUTION: A minimum of two people are required for safe removal and replacement of the chassis.

1. Shut down both controllers using Nexsan Unity. See "Shutting down the cluster or individual cluster nodes" in the Nexsan Unity Software User Guide for details.

2. Remove all cables, being certain to label each with the name and number of the port to which it was attached.

3. Remove both controllers from the failed chassis. Take note of the positioning of the controllers.

4. Remove the thumbscrews that hold the front of the chassis to the rack.

Figure 5-1: Example - Removing thumbscrews

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5. To remove the chassis, slide the inner-chassis rails from the outer-rack rails ensuring equal pressure on both rails. You may have to press the locking tabs to release the chassis, prior to sliding. Place the chassis aside.

Figure 5-2: Example - Locking tabs

CAUTION: Do not pick up the server by the front handles, they are only designed to pull the chassis from the rack.

Note As replacement chassis ship with chassis rails pre-installed, it is not necessary to remove the chassis

rails from the old chassis.

► To install a replacement chassis:

1. Lift the chassis from each side—not from the front or back.

2. Line up the inner-chassis rails with the front of the outer-rack rails.

Figure 5-3: Example - Installing a chassis

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3. Slide the inner-chassis rails into the outer-rack rails, keeping the pressure even on both sides. Depress the locking tabs when inserting.

Figure 5-4: Example - Depressing the rail locking tabs

4. Push the chassis completely into the rack. You should hear the locking tabs "click"when in position.

5. Tighten the thumbscrews that hold the front of the chassis to the rack.

Note The thumbscrews are already attached to the front of the chassis.

Figure 5-5: Example - Tightening the thumbscrews

6. Install both controllers into the same slots in the replacement chassis as the old chassis.

7. Replace all cables, ensuring that they are put back into the proper ports. See Step 2 of To remove a chassis.

8. Transfer the disk drives from the old chassis to the replacement chassis in the same configuration. See

Replacing FASTier drives on page22 and Replacing data disks on page18.

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9. Open Nexsan Unity and verify that both controllers are being recognized by the system. Click Cluster Status in the Unity Dashboard for more options.

Notes: If the controllers do not automatically start up, select each controller in Unity and click the Turn

On Controller button.

It may take a few minutes for the controllers to fully start-up.

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System SSDs

Unity Storage Systems have two internal solid-state disks (SSDs): One FASTier write cache SSD and one drive used for the Unity operating system (the OS SSD).

See:

Replacing the FASTier Cache SSD below

Replacing the OS SSD on page68

Replacing the FASTier Cache SSD

The FASTier Cache SSD replacement procedure involves both software and hardware steps. It is necessary that you perform these procedures with assistance by Technical Support, see Contacting Nexsan on page7.

Note The FASTier Write Cache SSD is the drive that is attached to the SATA1 port.

► To replace a FASTier Cache SSD drive:

1. Contact Technical Support and have them prepare your Unity for the SSDreplacement.

2. Perform the migrate cluster resources, unit shutdown, and cover removal steps under System sub-

components on page41.

Note If the FASTier data cables are not fed through the plastic guides on the top of the clear plastic disk

shelf, proceed to step 4.

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3. Unplug the FASTier data cables from the motherboard and slide them out of the plastic guides on top of the shelf.

Note Label each cable with the port it was plugged into so that it can be replaced in the proper plug when

you are finished.

Figure 5-6: Unplugging FASTier cords and sliding them out of the plastic guides

4. Remove the power and data cables from the cache SSD drive.

Note Label each power and data cable with the drive from which it was removed so that it can be properly

replaced when you are finished.

Figure 5-7: Unplugging OS SSD drive

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System SSDs

5. Unlatch the shelf on either side and remove it.

Figure 5-8: Removing the plastic shelf

6. Turn the shelf over and unscrew the old cache SSD drive to remove it.

Figure 5-9: Removing the old cache SSD drive

7. Attach the new cache SSD drive to the shelf.

8. Place the plastic shelf back into the unit (see Figure 5-8).

9. Re-attach the power and data cables to the cache SSD (see Figure 5-7).

10. Thread the FASTier data cables back through the plastic guides and re-attach them to the motherboard (see Figure 5-6).

11. Replace the top cover (see System sub-components on page41) and secure it with the cover screws (see System sub-components on page41).

12. Return the unit to the rack.

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13. Replace all communication cables on the unit.

Note Be sure to put all cables back into the proper ports. See Step 4 under System sub-components on

page41.

14. Re-attach the power cables to the power supply units (PSUs) to turn the unit back on.

15. Allow Technical Support to configure the new battery-backed cache SSDdisk.

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System SSDs

Replacing the OS SSD

The OS SSD replacement procedure involves both software and hardware steps. To make the process easier, it has been divided into five sections.

It is necessary that you perform these procedures with Technical Support assistance. See Contacting

Nexsan on page7 for telephone numbers and email addresses for your region.

Record system settings

Some system settings must be reconfigured after the OS SSD is replaced. It is necessary, therefore, to write these settings down so that they can be properly re-entered later.

► To record system settings:

1. Ensure that IPMI is properly configured on the unit, and write down the IPMI settings:

a. On the Unity Dashboard, click Cluster Status.

b. Click Status >IPMI.

c. Make sure that the IPMI settings are configured; if they are not, you must configure them, including

assigning an IPMI address to each controller node.

d. Write down all IPMI settings.

2. Write down all IP and network settings:

a. On the Unity Dashboard, click Cluster Status.

b. Click Status >IP Configuration.

c. Write down all IP and network settings.

3. Determine which node is the active node and which is the passive node.

Note Although both controller nodes in the Active/Active Cluster implementation are “active”, the

controller node that is currently hosting the cluster management services is considered the active controller by the system. It's best to replace the OS SSD on the passive node first, and then replace the OS SSD on the active node.

a. Open a separate SSH session to each node.

b. On each node, log on as nxadmin.

c. When the command prompt appears, type menu, then press the Enter key.

d. When the main menu is displayed, type 2 (Shutdown and Reboot Menu), then press the Enter key.

e. Type 8 (Power Control Menu...) and press the Enter key.

f. Type 2 (Show Status) and press the Enter key to display the node’s status, either active or passive.

Back up the old OS SSD

The operating system and system configuration reside on the OS SSD. It is therefore necessary to copy this information from the old OS SSD to the new one. However, this process can only be done by Technical Support, see Contacting Nexsan on page7.

When Technical Support has finished backing up the OS SSD, you may then continue with the next procedure.

Install the new OS SSD

Note The OS SSD is the drive that is attached to the SATA0 port.

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► To remove the old OS SSD and install the new one:

1. Perform the unit shutdown and cover removal steps under System sub-components on page41.

Note If the FASTier data cables are not fed through the plastic guides on the top of the clear plastic disk

shelf, proceed to step 3.

2. Unplug the FASTier data cables from the motherboard and slide them out of the plastic guides on top of the shelf.

Note Label each cable with the port it was plugged into so that it can be replaced in the proper plug when

you are finished.

Figure 5-10: Unplugging FASTier cords and sliding them out of the plastic guides

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System SSDs

3. Remove the power and data cables from the OS SSD drive.

Note Label each power and data cable with the drive from which it was removed so that all cables can be

correctly replaced when you are finished.

Figure 5-11: Unplugging OS SSD drive

4. Unlatch the shelf on either side and remove it.

Figure 5-12: Removing the plastic shelf

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5. Turn the shelf over and unscrew the old OS SSD drive to remove it.

Figure 5-13: Removing the old OS SSD drive

6. Attach the new OS SSD drive to the shelf.

7. Place the plastic shelf back into the unit (see Replacing the OS SSD on page68).

8. Re-attach the power and data cables to the OS SSD (see Replacing the OS SSD on page68).

9. Thread the FASTier data cables back through the plastic guides and re-attach them to the motherboard (see Replacing the OS SSD on page68).

10. Replace the top cover (see System sub-components on page41) and secure it with the cover screws (see System sub-components on page41).

11. Return the unit to the rack.

12. Replace all communication cables on the unit.

Note Be sure to put all cables back into the proper ports. See Step 4 under System sub-components on

page41.

13. Re-attach the power cables to the power supply units (PSUs) to turn the unit back on.

Transfer data to the new OS SSD

When the passive controller comes back online, Technical Support must then transfer data to the new OS SSD. To contact Technical Support, see Contacting Nexsan on page7.

When the OS SSD data has been restored, you may then continue to the next procedure.

Re-enter IPMI settings

► To re-enter IPMI settings for the restored controller:

1. On the Unity Dashboard, click Cluster Status.

2. Click Status >IPMI.

3. Using the settings you recorded in Step 1 of Record system settings on page68, re-enter the IPMI settings for this unit.

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SATADom

Replace and restore the OS SSD on the other unit

You must now replace the OS SSD, reconfigure IP and network settings, and restore the operating system and system configuration on the other unit.

► To replace and restore the OS SSD on the other unit:

1. Perform the unit shutdown and cover removal steps under System sub-components on page41.

2. When the unit is shut down, perform the procedures under Install the new OS SSD on page68, Transfer

data to the new OS SSD on the previous page, and Re-enter IPMI settings on the previous page for the

unit.

SATADom

The SATADom (Serial ATA Disk on Module) replacement procedure involves both software and hardware steps, and must be performed on both controllers in a clustered environment.

The process has been divided into the following sections:

Replacing a SATADom below

It is necessary that you perform these procedures with the assistance of Technical Support, see Contacting

Nexsan on page7.

Replacing a SATADom

Each Unity Storage System controller has one 16GB OSSATADom.

If an OS SATADom fails, the controller will become unresponsive. If you suspect a failed OSSATADom, please contact Technical Support to make an official diagnosis, see Contacting Nexsan on page7.

► To record system settings:

In some instances, system settings must be reconfigured after the SATADom is replaced. It is therefore important to write these settings down so that they can be properly re-entered after installation.

Ensure that IPMI is properly configured on the unit, and write down the IPMI settings:

1. On the Unity Dashboard, click Cluster Status.

2. Click Status >IPMI.

3. Make sure that the IPMI settings are configured; if they are not, you must configure them, including assigning an IPMI address to each controller node.

4. Write down all IPMI settings.

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5. On a clustered system, determine which controller node is the active node and which is the passive node.

Note Although both controller nodes in the Active/Active Cluster implementation are “active”, the

controller node that is currently hosting the cluster management services is considered the active controller by the system. If you are replacing SATADoms on both controllers, you should replace the SATADom on the passive controller first, and then replace the SATADom on the active controller.

a. Open a separate SSH session to each controller node.

On each node, log on as nxadmin.

c. When the command prompt appears, type menu, then press the Enter key.

d. When the main menu is displayed, type 2 (Shutdown and Reboot Menu), then press the Enter key.

e. Type 8 (Power Control Menu...) and press the Enter key.

f. Type 2 (Show Status) and press the Enter key to display the node’s status, either active or passive.

g. Type 1 (Show Location) and press the Enter key to display the position of the controller in the

chassis; for example, Left side of chassis from front, slot 01.

► To back up the old SATADom:

The operating system and system configuration reside on the SATADom. It is therefore necessary to copy this information from the old SATADom to the new one. This process can only be done by Technical Support, see Contacting Nexsan on page7.

Once Technical Support has completed backing up the SATADom, you may continue with the following procedures.

► To remove and replace the SATADom:

1. Remove the controller from the system. See Unity Storage Expansion controllers on page36 for directions.

2. Press the small, metal latch near the base of the SATADom, then gently remove the SATADom from the socket.

Note The SATADom may be hard to remove. Do NOT force it, but gently oscillate it from side to side

until it comes out.

Figure 5-14: Removing the old SATADom

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SATADom

3. Remove the SATADom power cable from the board next to the SATADom socket.

Figure 5-15: Removing the SATADom’s power cable

4. Attach the new SATADom to its power cable, then plug the new SATADom power cable into the socket on the board.

Figure 5-16: Connecting the new SATADom power cord

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Chapter 5: Support-Assisted Replacements: Class 3

5. Gently plug the new SATADom into the socket until the latch clicks.

Figure 5-17: Inserting the new SATADom

CAUTION: Be sure that the SATADom power cable wires are clear of the edge of the controller. Failure to do so may result in damage to the wires when the controller is replaced.

Figure 5-18: Power cable placement, good (left) and bad (right)

6. Slide the controller back into the chassis and reattach all cables. See Unity Storage Expansion

controllers on page36 for directions.

► To transfer data to the new SATADom:

When the controller comes back online, Technical Support must then transfer data to the new SATADom. To contact Technical Support, see Contacting Nexsan on page7.

► To re-enter IPMI settings for the restored controller:

1. On the Unity Dashboard, click Cluster Status.

2. Click Status >IPMI. See Step 1 of To record system settings: on page72.

3. Using the IPMIsettings you wrote down, re-enter the IPMI settings for this controller.

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Nexsan Head quarters

325 E. Hillcrest Drive, Suite #150 Thousand Oaks, CA 91360 United States of America

Nexsan Can ada

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Nexsan Ship pin g

302 Enterprise Street , Suite A Escondido, CA 92029 United States of America

Nexsan Unity Docu ments & Downlo ads pag e:

https://helper.nexsansupport.com/unt_support

Worldwide Web

www.nexsan.com

Nexsan® is a trademark or registered trademar k of Nexsan Technologies, Inc. The Nexsan logo is a registered trademark of Nexsan Technologies,Inc.

Allother trademarks and registered trademarks are the property of their respective owner s.

Document Reference:20190102AM113646

Nexsan UK

Units 33–35, Parker Centre, Mansfield Road Derby, DE21 4SZ United Kingdom

Nexsan Unity support:

https://helper.nexsansupport.com/unt_support

This pr oduct isprotected by one or more of the following patents, and other pending patent applications worldwide:

United States patents US8,191,841, US8,120,922;

United Kingdom patents GB2466535B, GB2467622B, GB2467404B, GB2296798B, GB2297636B