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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.

Chapter 1: Customer-Replaceable Units: Class 1

1

Nexsan Unity

www.nexsan.com

25

Summary of Contents for Nexsan Unity

Page 1: ...PER 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 ...

Page 2: ...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 witho...

Page 3: ...ty 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 De s c r i p t i o n 3 7 Co n t r o l l e r 3 7 Sy n t a x 3 7 Op t i o n s 3 7 Ex a mp l e 3 7 Replacing a Unity Storage Expansion controller 39 System sub components 41 Fans 43 Replacing a fan 43 Chapter 3 Customer Replaceable...

Page 4: ...ing 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 Contents Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 4 ...

Page 5: ...upport 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 ar...

Page 6: ...ical user interface GUI italics System messages and non interactive items 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 manual...

Page 7: ...e https helper nexsansupport com unt_ onlinehelp html Contact Nexsan Unity support https helper nexsansupport com unt_support Worldwide Web site www nexsan com Related documentation The following Nexsan product manuals contain related information Nexsan Unity Online Help Nexsan Unity Hardware Reference Guide Nexsan UnityHardware Maintenance Guide Unity Next Generation Nexsan Unity Software User Gu...

Page 8: ...straight and lift with your legs When installing the system as a rack mounted component ensure that all Nexsan supplied mounting fixtures are secure All bolts and screws should be fully tightened Failure to comply with this may result in the unit not being fully supported in the rack and could lead to the product falling from the rack causing personal injury or falling onto other rack components E...

Page 9: ...upport 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 Nexsan Unity www nexsan com 9 1 ...

Page 10: ...ic 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 expos...

Page 11: ...e 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 d...

Page 12: ...ach 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 Disk drives 1 Nexsan Unity Hardware Maintenance Guide v 5 1 Uni...

Page 13: ...Figure 1 5 Event log entry for failed disk Figure 1 6 Event log entry indicating that the disk array has been rebuilt Chapter 1 Customer Replaceable Units Class 1 1 Nexsan Unity www nexsan com 13 ...

Page 14: ...6 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 S...

Page 15: ...ave all required information including the specific drive bay that the failed disk occupies proceed to Replacing data disks on page 18 Chapter 1 Customer Replaceable Units Class 1 1 Nexsan Unity www nexsan com 15 ...

Page 16: ...isk 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 notifi...

Page 17: ...ssis 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 Chapter 1 Customer Replaceable Units Class 1...

Page 18: ...ess 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 Disk drives 1 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 18 ...

Page 19: ...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 Chapter 1 Customer Replaceable Units Class 1 1 Nexsan Unity www nexsan com 19 ...

Page 20: ... 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 Disk drives 1 ...

Page 21: ...dicates 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 Ch...

Page 22: ...er 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 carrie...

Page 23: ...e 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 Chapter 1 Customer Replaceable Units Class 1 1 Nexsan Unity www nexsan com 23 ...

Page 24: ...ign 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 ...

Page 25: ...ed 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 po...

Page 26: ...icates 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 Power supply units PSUs 1 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 26...

Page 27: ...sis 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 th...

Page 28: ...e 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 Power supply units PSUs 1 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 28 ...

Page 29: ... 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 Chapter 1 Customer Replaceable Units Class 1 1 Nexs...

Page 30: ...ting 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 Power supply units PSUs 1 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 30 ...

Page 31: ... 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...

Page 32: ...Figure 1 34 Event indicating that the PSU has returned to an acceptable range Power supply units PSUs 1 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 32 ...

Page 33: ...ss 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...

Page 34: ...SFPs Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 34 ...

Page 35: ... 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 Nexsan Unity www nexsan com 35 2 ...

Page 36: ...ing 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 Unity Storage Expansion controllers 2 Nexsan Unity Hardware Mainte...

Page 37: ...0 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 details consult the Nexsan Unity nxcmd Command Line Interface Reference Guide available from the Nexsan com Unity supp...

Page 38: ... 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 Unity Storage Expansion controllers 2 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 38 ...

Page 39: ...ller 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...

Page 40: ... 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 Unity Storage ...

Page 41: ...ft 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 8...

Page 42: ...ller 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 System sub components 2 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 42 ...

Page 43: ...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 Chapter 2 Customer Replaceable U...

Page 44: ...ly 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 Fans 2 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 44 ...

Page 45: ... 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 Chapter 2 Customer Replaceable Units Class 2 2 Nexsan Unity www nexsan com 45 ...

Page 46: ...e 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 re...

Page 47: ...ding 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 Chapter 2 Customer Replaceable Units Class 2 2 Nexsan Unity www nexsan com 47 ...

Page 48: ...hat 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 ...

Page 49: ... 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 bu...

Page 50: ...cing 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 pa...

Page 51: ...e 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 Chapter 2 Customer Replaceable Units Class 2 2 Nexsan Unity www nexsan com 51 ...

Page 52: ...Fans Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 52 ...

Page 53: ...ance 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 Nexsan Unity www nexsan com 53 3 ...

Page 54: ... 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 uni...

Page 55: ...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 SF...

Page 56: ...ized 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 ...

Page 57: ...stems 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 Nexsan Unity www nexsan com 57 4 ...

Page 58: ...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 performanc...

Page 59: ... 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 Nexsan Unity www nexsan com 59 5 ...

Page 60: ...ollowed 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 d...

Page 61: ... 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 Install...

Page 62: ...ck 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 t...

Page 63: ...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 Chapter 5 Support Assisted Replacements Class 3 5 Nexsan Unity www nexsan com 63 ...

Page 64: ...ocedures 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 N...

Page 65: ...ug 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 Chapter 5 Support Assisted Replacements Class 3 5 Nexsan Unity ww...

Page 66: ...ic 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 Sy...

Page 67: ... 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 Chapter 5 Support Assisted Replacements Class 3 5 Nexsan Unity www nexsan com 67 ...

Page 68: ... 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 ...

Page 69: ... 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 Chapter 5 Support Assisted Replacements Cla...

Page 70: ...th 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 System SSDs 5 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 70 ...

Page 71: ...nication 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 Contact...

Page 72: ...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...

Page 73: ...he 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 onl...

Page 74: ...t 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 SATADom 5 Nexsan Unity Hardware Maintenance Guide v 5 1 Unity 74 ...

Page 75: ...les 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 ...

Page 76: ... nexsan com Nexsan Unity support https helper nexsansupport com unt_support Copyright 2010 2018 Nexsan Technologies Inc All Rights Reserved Nexsan is a trademark or registered trademark of Nexsan Technologies Inc The Nexsan logo is a registered trademark of Nexsan Technologies Inc All other trademarks and registered trademarks are the property of their respective owners Document Reference 20190102...

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