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2. Verify that your system meets the requirements listed in the

Replacing SAS cables section.

3. If you are replacing SAS copper cables with SAS optical cables, verify that the disk shelves in

the storage system have the latest version of disk shelf firmware by completing the following
substeps; otherwise, go to step

on page 51.

a. Enter the following command:

sasadmin expander_map

For clustered systems, you must run this command from the nodeshell.

b. Locate the disk shelf firmware information for the disk shelves in the output.

0151 is the disk shelf firmware version for shelf number one (Slot A/IOM A) in the storage
system:

Expanders on channel 4a:

Level 3: WWN 500a0980000840ff, ID 1, Serial Number ' SHU0954292G114C', Product

'DS424IOM6 ', Rev '0151', Slot A

c. Compare the firmware information in the command output with the disk shelf firmware

NetApp Downloads: Disk Shelf Firmware

to determine the most current disk

shelf firmware version.

4. The next step depends on how current the disk shelf firmware is on your disk shelves.

If the firmware version in the
command output is...

Then...

The same as the most current
version on the NetApp Support
Site

Complete Step 5 through Step 7.

No disk shelf firmware update is needed.

An earlier version than the most
current version on the NetApp
Support Site

Complete Step 5 through Step 8.

You need to update the disk shelf firmware.

5. Enter the applicable command from the system console to perform a clean shutdown:

For...

Then issue this command...

7-Mode

halt

Clustered systems

halt local

6. Replace any SAS cables.

If you are replacing more than one SAS cable, replace them one at a time to avoid confusion.

Note: Wait at least 10 seconds before connecting the port. The SAS cable connectors are
keyed; when oriented correctly into a SAS port, the connector clicks into place and the disk
shelf SAS port LNK LED illuminates green. For disk shelves, you insert a SAS cable
connector with the pull tab oriented down (on the underside of the connector). For
controllers, the orientation of SAS ports can vary depending on the platform model;
therefore, the correct orientation of the SAS cable connector varies.

7. Verify that you have correctly replaced the cables by bringing your system back up.

a. Boot the system.

b. Enter the following command at the system console:

sysconfig

For clustered systems, you must run this command from the nodeshell.

The output should be the same as Step 1; The system should be

Single-Path

or

Mixed-

Path

, and the SAS port and attached disk-shelf information should be the same.

DS4243, DS2246, DS4486, and DS4246 Installation and Service Guide

51

Replacing disk shelf components

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Summary of Contents for DS2246

Page 1: ...SAS Disk Shelves Installation and Service Guide For DS4243 DS2246 DS4486 and DS4246 June 2020 215 06427_F0 doccomments netapp com ...

Page 2: ...toring the operator display panel 34 Location of the operator display panel LEDs 34 What the operator display panel LEDs mean 35 Operator display panel console error messages 35 Monitoring the disk drives or carriers 37 Location of the disk drive or carrier LEDs 37 What the disk drive LEDs mean for DS4243 DS2246 and DS4246 disk shelves 38 What the disk carrier LEDs and H1 shelf mode mean for DS448...

Page 3: ...eplacing a power supply 55 Hot swapping or replacing an IOM 56 Replacing an operator display panel in a DS2246 disk shelf 59 Replacing disk shelves 60 Recommended power line sizes 64 Recommended AC power line sizes 64 Calculating the length of DC wires for DS4243 disk shelves 64 Rules for handling disk carriers for DS4486 disk shelves 69 Document update record 70 Copyright and trademark 74 Copyrig...

Page 4: ...storage system into a movable cabinet or rack install from the bottom up for best stability A fully loaded disk shelf is heavy Do not try to lift it by yourself Before moving the enclosure you can remove all Power Supply Units PSUs and I O Modules IOMs to minimize weight A fully loaded DS4243 or DS4246 disk shelf can weigh approximately 110 lbs 50 kg A fully loaded DS2246 disk shelf can weigh appr...

Page 5: ...ower supply must be connected to separate isolated branch circuits Provide a suitable power source with electrical overload protection to meet the requirements laid down in the technical specification Before operating replacing or removing the disk shelf or disk shelf components make sure that you have read and understand these management safety rules In order to comply with applicable safety emis...

Page 6: ...to you supplier for repair CAUTION This unit has more than one power supply cord To reduce the risk of electrical shock disconnect all power supply cords for complete isolation before servicing DS4243 DS2246 DS4486 and DS4246 Installation and Service Guide 6 SAS disk shelf safety information ...

Page 7: ...e Cabling disk shelves in a new HA pair or single controller configuration procedure in the which includes connecting the disk shelf power cords powering on the disk shelves verifying shelf IDs and cabling SAS and ACP connections If you are installing a new MetroCluster system with SAS disk shelves you should be using the appropriate MetroCluster document which might have referred you to this proc...

Page 8: ...moving a fully loaded DS4243 or DS4486 disk shelf Attention A fully populated DS4243 or DS4246 disk shelf can weigh approximately 110 lbs 49 9 kg A fully populated DS2246 disk shelf can weigh approximately 49 lbs 22 kg A DS4486 disk shelf with the two IOMs four power supplies and four disk carriers can weigh approximately 82 lbs 37 kg A fully populated disk shelf can weigh approximately150 lbs 68 ...

Page 9: ... IDs continue to be unique within the HA pair or single controller configuration If two or more SAS disk shelves have the same ID the EMS message sas shelf conflict appears on the system console and the system assigns an ID to the duplicate disk shelf You must reassign the duplicate shelf ID Note For systems running Data ONTAP 8 2 x or earlier the system assigns a soft ID number equal to or greate...

Page 10: ...king and the fault LED on the operator display panel illuminates after about five seconds alerting you that the pending disk shelf ID has not yet taken effect 8 Power cycle the disk shelf to make the shelf ID take effect You must turn off both power switches wait the appropriate amount of time and then turn them back on to complete the power cycle If ONTAP is not yet running or you are hot adding ...

Page 11: ...pairs and cable the SAS connections according to the cabling rules and worksheets defined in the SAS and ACP Cabling Guide for DS4243 DS2246 DS4486 and DS4246 Disk Shelves Disk shelf IOM disk drive and if applicable ACP firmware should be current on all disk shelves in your system before adding new disk shelves shelf FRU components or SAS cables The best practice is to always have the most current...

Page 12: ...an equipment rack or NetApp cabinet you must install the two post telco tray kit or four post rail kit that came with your disk shelf Wait at least 10 seconds before connecting the port The SAS cable connectors are keyed when oriented correctly into a SAS port the connector clicks into place and the disk shelf SAS port LNK LED illuminates green For disk shelves you insert a SAS cable connector wit...

Page 13: ...air of patch panels can be used in a path You need to supply the patch panels and inter panel cables The inter panel cables must be the same mode as the SAS optical breakout cable multimode You received a set of QSFP to MPO cable modules with each set of SAS optical breakout cables which you must attach to the MPO end of each SAS optical breakout cable The breakout cables have SC LC or MTRJ connec...

Page 14: ...oximately 82 lbs 37 kg A fully populated disk shelf can weigh approximately150 lbs 68 kg 4 Reinstall any power supplies and IOMs you removed to install your disk shelf into the rack If you installed a DS4486 disk shelf carefully unpack and insert the remaining disk carriers Note Do not place hands on the two disk drive boards exposed on the underside of the disk carrier 5 If you are adding multipl...

Page 15: ...ta ONTAP 8 2 1 or later enter acpadmin configure For 7 Mode HA pairs you can run this command from either node For clustered systems you must run this command from the nodeshell of the target node b Dedicate a network interface and specify other parameters such as network domain and netmask as prompted For 7 Mode HA pairs you must dedicate a network interface for each node Note Some storage system...

Page 16: ...y that all cables are securely fastened If a disk shelf error message appears on the console after you complete SAS cabling you need to use the information in SAS cabling error messages to determine the corrective actions you should take 2 Verify SAS connectivity by completing the following substeps For 7 Mode HA pairs you can run these commands from the system console of either node For clustered...

Page 17: ...you can specify that storage system by using the o owner_name option To determine the owner_name you can run the hostname command at the console of either controller c Enter the following command to verify the assignments that you made disk show v 5 If you are currently using the ACP capability or want to start using it complete the following substeps otherwise go to the next step If you are cabli...

Page 18: ... Data ONTAP detects more than one Serial Attached SCSI SAS disk shelf connected to the same adapter with the same disk shelf number Corrective action 1 Change the disk shelf number on the disk shelf to one that does not conflict with other shelves attached to the same adapter 2 Halt the system and reboot the disk shelf 3 If the problem persists contact technical support Verifying the disk drive di...

Page 19: ... and no action is needed If there is a message containing disk fw downrevWarning and text stating disks have downrev firmware that you need to update update the disk drive firmware to the most current version using the applicable command at the advanced privilege level For 7 Mode disk_fw_update For clustered Data ONTAP from the clustershell storage disk firmware update Attention These commands man...

Page 20: ...o to Step 4 otherwise the procedure is complete 4 If you are using ACP verify that the ACP firmware is the most current version a Enter the following command at the system console storage show acp For clustered Data ONTAP enter this command through the nodeshell b Locate the ACP firmware information for the hot added shelf in the output You should see command output similar to the following Altern...

Page 21: ...t Site a Go to Disk Shelf Firmware on the NetApp Support Site NetApp Downloads Disk Shelf Firmware b Click the download link for all current Disk Shelf I O Module Firmware at the top of the page You are brought to Instructions for Downloading and Installing Disk Shelf and ACP Firmware c Update the ACP firmware by following the instructions DS4243 DS2246 DS4486 and DS4246 Installation and Service G...

Page 22: ...tive IQ Config Advisor to view any SAS cabling error messages and the corrective actions you should take NetApp Downloads Config Advisor You must have already removed all aggregates from the disk drives in the disk shelves you are removing Attention If you attempt this procedure with aggregates on the disk shelf you are removing you could fail the system with a multi disk panic For information abo...

Page 23: ...cribed in the cabling guide the IOM and or IOM ports might be different Path A refers to the A side disk shelf I O module IOM A located in the top or left of the disk shelf depending on your disk shelf model Path B refers to the B side disk shelf I O module IOM B located in the bottom or right of the disk shelf depending on your disk shelf model The first disk shelf in the stack is the disk shelf ...

Page 24: ... this procedure 2 Verify that no aggregates are on the disk drives in the disk shelves you are removing by completing the applicable substeps If your system is operating in Then 7 Mode a Enter the following command aggr status r If you have traditional volumes you enter the vol status r command For multipath HA configurations you can enter the command from the console of either controller b Check ...

Page 25: ... ONTAP storage disk show shelf shelf_number b Check the output and take the appropriate action If the output shows Then For 7 Mode Not Owned or FAILED For clustered Data ONTAP unassigned or broken Go to the next step The disk drives in the disk shelves you are removing are in the correct state Any disk drives in the disk shelves you are removing have ownership You can use the Removing ownership fr...

Page 26: ...ck of the specified disk shelves flash LEDs continue to flash for up to five minutes Note You need to be certain of which disk shelves you are removing so that you can correctly recable path A and path B later in this procedure Even if you are removing an entire stack of disk shelves it is recommended that you use this command To physically identify disk shelf 3 you enter storage shelf identify 0b...

Page 27: ...e stack you are removing and putting it aside then move the stack to stack cable connected from the last disk shelf IOM B ACP circle port in the stack you are removing to the same ACP port in the last disk shelf of the previous stack The last stack i Uncable the ACP shelf to shelf connections and put the cables aside ii Uncable the ACP intrastack connections from the first disk shelf IOM B ACP squ...

Page 28: ... Remove the cable connecting the IOM A SAS circle port of the disk shelf being removed and the IOM A SAS square port of the next disk shelf in the stack and set it aside b Move the cable connecting the IOM A SAS square port of the disk shelf being removed to the IOM A SAS square port of the next disk shelf in the stack The last disk shelf in a stack a Remove the cable connecting the IOM A SAS squa...

Page 29: ...cause ACP connections are independent of the data path there is no need to recable according to path A and path B If you are removing Then The first shelf in a stack a Remove the cables connecting the ACP circle ports of IOM A and IOM B of the first disk shelf and the ACP square ports of the next disk shelf in the stack and set them aside b Move the cable connecting the Ethernet port on the contro...

Page 30: ...t ACP connectivity is reestablished by entering the following command from the console of either controller storage show acp The ACP discovery cycle takes about 21 minutes to complete When ACP connectivity is reestablished the output for line item ACP connectivity status shows Full Connectivity 11 If when you removed ownership from the disk drives as part of the preparation for this procedure you ...

Page 31: ... the screws securing the disk shelf to the rack 8 Remove the disk shelf from the rack To make the disk shelf lighter and easier to maneuver remove the power supplies and I O Modules IOMs Avoid removing the disk drives or carriers if possible because excessive handling can lead to internal damage You might want to use a mechanical hoist or lift if you are moving a fully loaded DS4243 or DS4486 disk...

Page 32: ...ctor with the pull tab oriented down on the underside of the connector 10 Turn on the power to the storage system 11 Reboot the storage system 12 If applicable return the failed part to NetApp as described in the RMA instructions that are shipped with the kit Contact technical support at NetApp Support 888 463 8277 North America 00 800 44 638277 Europe or 800 800 80 800 Asia Pacific if you need th...

Page 33: ...ic disk shelf more easily Initiating the mode causes the green and amber LEDs on a specific disk shelf to blink in unison In addition the shelf digital display alternates between flashing H0 and the shelf ID number The following table summarizes how the H0 shelf mode and LEDs behave when you initiate and exit the H0 shelf mode Note The Using the H0 shelf mode section describes how to initiate and ...

Page 34: ...ED remains solid 2 Exit the H0 shelf mode by entering the following command at the console of either controller in an HA pair storage shelf identify adapter_name shelfshelf_ID off storage shelf identify 2a shelf5 off The following takes place once the disk shelf has exited the H0 shelf mode The shelf digital display only shows the shelf ID number The LEDs on the disk drives or carriers power suppl...

Page 35: ...e disk shelf IOMs and power supplies are functioning normally Disk shelf fault Amber An error occurred with the function of a disk drive IOM or power supply Activity Green A link is established between the disk shelf and the storage system or another disk shelf that it is attached to Operator display panel console error messages When the SCSI Enclosure Services SES process on the disk shelf detect...

Page 36: ...hat detected the warning condition might be faulty 4 If the problem persists after the module or modules are replaced replace the disk shelf 5 If the problem persists contact technical support for assistance ses status temperatureError Description This message occurs when the indicated disk shelf temperature sensor reports a temperature that exceeds the specifications for the disk shelf or its com...

Page 37: ...l is secure if possible 4 If the problem persists and if the shelf has multiple temperature sensors but only one exhibits the problem replace the module that contains the sensor reporting the error 5 If the problem persists contact technical support Monitoring the disk drives or carriers You can monitor the health of the disk drives or carriers by familiarizing yourself with the location of the LE...

Page 38: ...rogress Amber fault Solid There is an error with the function of the disk drive or carrier See console error messages Note In some versions of Data ONTAP when a disk drive fails due to excessive link errors adapter errors or timeouts the fault LED does not illuminate This makes it difficult to physically locate the disk drive that needs to be replaced NetApp Bugs Online Bug ID 767822 What the disk...

Page 39: ... the disk carrier Attention It can take up to 12 hours or more for each terabyte of data to finish copying from a good disk to a spare disk The disk copies operate in the background and are throttled to minimize impact to client I O Do not remove any faulted disk carrier while the disk shelf is in H1 shelf mode or while any amber LEDs are blinking You can safely remove a disk carrier only when all...

Page 40: ... the adapter and loop ID of the SCSI Enclosure Services SES controlled target for which the SES has control fail Corrective action 1 Check the LEDs on the disk shelf and the disk shelf modules on the back of the disk shelf to see whether there are any abnormalities If the modules appear to be problematic replace the applicable module 2 If the SES target is a disk drive check to see whether the dis...

Page 41: ...the hardware The following illustration shows the front of the IOM and the location of the LEDs Note Although IOM6 appears on the IOM in the illustration the LED locations are the same for IOM3 LNK LNK IOM6 IOM6 1 2 1 Fault 2 LNK What the IOM LEDs mean You can determine the status of the I O modules IOMs by understanding the meaning of the IOM LEDs when they are illuminated At power up the fault L...

Page 42: ...control path capability Corrective action Replace the module In some disk shelf types this function is integrated into the SAS interface modules ses status ACPWarn Description This messages occurs when a non fatal condition has been detected in the ACP processor that provides alternate control path capability Corrective action Replace the module In some disk shelf types this function is integrated...

Page 43: ...following illustration shows the location of the LEDs on the power supply used in the DS2246 and DS4486 disk shelves AC 1 2 3 4 1 PSU OK 2 DC fault 3 AC fault DS4243 DS2246 DS4486 and DS4246 Installation and Service Guide 43 Monitoring disk shelf components ...

Page 44: ...d PSU OK Green Power supply is functioning normally Note The other three LEDs are not illuminated Fan fault Amber An error occurred with the function of the fan AC fault Amber The power supply is not turned on or the AC power cord is not plugged in DC fault Amber The power supply cannot provide DC voltage to the disk shelf within margin Power supply console error messages When an SES element on a ...

Page 45: ... Description This message occurs when a critical condition is detected in the indicated disk storage shelf current sensor The disk shelf might be able to continue operation Corrective action 1 Verify that the power supply and the AC line are supplying power 2 Monitor the power grid for abnormalities 3 Replace the power supply 4 If the problem persists contact technical support ses status temperatu...

Page 46: ... reporting the error 5 If the problem persists contact technical support Note You can display temperature thresholds for each disk shelf by using the environment shelf command For clustered systems you must run this command from the nodeshell of the target node DS4243 DS2246 DS4486 and DS4246 Installation and Service Guide 46 Monitoring disk shelf components ...

Page 47: ...pairs with external storage the external storage must be cabled as multipath HA For FAS22xx single controller configurations with external storage the external storage must be cabled as dual path multipath Disk shelf IOM disk drive and if applicable ACP firmware should be current on all disk shelves in your system before adding new disk shelves shelf FRU components or SAS cables The best practice ...

Page 48: ...udes the set of breakout cables patch panels and inter panel cables If you are using SAS optical multimode breakout cables the following rules apply You can use these cables for controller to stack and shelf to shelf connections If you use multimode breakout cables for a shelf to shelf connection you can only use it once within a stack of disk shelves You must use SAS optical multimode QSFP to QSF...

Page 49: ...he output is displayed as Mixed Path HA for an HA pair This is because the internal storage is cabled as single path HA and the external storage is cabled as multipath HA 2 If you are replacing SAS copper cables with SAS optical cables verify that the disk shelves in the storage system have the latest version of disk shelf firmware by completing the following substeps otherwise go to Step 4 a Ente...

Page 50: ...r varies a Replace cables on Side A one cable at a time The Side A cables are the cables connected to IOM A of each disk shelf b Verify that you have correctly replaced the SAS cables by entering the following command at the console of either controller sysconfig The output should be the same as Step 1 the system should be Multi Path HA or Multi Path and the SAS port and attached disk shelf inform...

Page 51: ... is needed An earlier version than the most current version on the NetApp Support Site Complete Step 5 through Step 8 You need to update the disk shelf firmware 5 Enter the applicable command from the system console to perform a clean shutdown For Then issue this command 7 Mode halt Clustered systems halt local 6 Replace any SAS cables If you are replacing more than one SAS cable replace them one ...

Page 52: ...e disk copies operate in the background and are throttled to minimize impact to client I O The What the disk carrier LEDs and H1 shelf mode mean for DS4486 disk shelves section describes the LED and H1 shelf mode behavior that indicates when it is safe to remove a faulted disk carrier You must have read and understood Rules for handling disk carriers for DS4486 disk shelves to prevent damage to th...

Page 53: ...age disk option show You can enter the command on either controller module If automatic drive assignment is enabled the output shows on in the Auto Assign column for each controller module b If automatic drive assignment is enabled disable it storage disk option modify node node_name autoassign off You must disable automatic drive assignment on both controller modules 2 Properly ground yourself 3 ...

Page 54: ...ully seated into the midplane and the handle clicks into place Be sure to close the cam handle slowly so that it aligns correctly with the face of the disk drive or carrier 10 If you are replacing another disk drive or carrier repeat Steps 2 through 8 11 If you disabled automatice drive assignment in Step 1 then manually assign drive ownership and then reenable automatic drive assignment if needed...

Page 55: ...stem console warning message and the illuminated fault LED on the power supply 3 Turn off the power supply and disconnect the power cables a Turn off the power switch on the failed power supply b Open the power cord retainer and unplug the power cord from the power supply c Unplug the power cord from the power source 4 Squeeze the latch on the cam handle until it releases and then open the cam han...

Page 56: ...then you should wait for a maintenance period to hot swap or replace an IOM Note Single controller single path configurations must be halted to replace an IOM therefore this type of configuration does not require a version of Data ONTAP that contains the two bug fixes Your disk shelf model must support the IOM that you are using to replace the failed IOM For example only 6 Gb I O modules IOM6 are ...

Page 57: ...iguration Go to the next step A single path HA configuration supported on FAS2040 FAS22xx and FAS25xx a Determine the target node which node controller the failed IOM belongs to IOM A belongs to Controller 1 IOM B belongs to Controller 2 b Take over the target node For systems operating Data ONTAP in 7 Mode from the console of the partner node cf takeover For clustered systems from the clustershel...

Page 58: ...Do not use excessive force when sliding the IOM into the disk shelf you might damage the connectors 8 Reconnect the stack cabling Wait at least 10 seconds before connecting the port The SAS cable connectors are keyed when oriented correctly into a SAS port the connector clicks into place and the disk shelf SAS port LNK LED illuminates green For disk shelves you insert a SAS cable connector with th...

Page 59: ...equires that you halt your system Attempting to remove the operator display panel before halting your system causes a system panic Steps 1 Ground yourself to the storage system chassis using the grounding leash 2 Shut down the storage system by entering the applicable command If your storage system is operating in Then enter the applicable command 7 Mode From the system console halt Cluster Mode F...

Page 60: ...t halt your system to replace a disk shelf Before you begin The disk shelf model you are installing must meet the storage system requirements specified in the Hardware Universe which includes supported shelf models supported disk drive types maximum number of disk shelves in a stack and supported Data ONTAP versions NetApp Hardware Universe About this task If you are installing DS4486 disk shelves...

Page 61: ...ives or carriers if possible because excessive handling can lead to internal damage Attention If you must remove disk carriers from the DS4486 disk shelf do not place hands on the two disk drive boards exposed on the underside of the disk carrier Note You might want to use a mechanical hoist or lift if you decide to move a DS4243 or DS4486 that is fully populated CAUTION A fully populated DS4243 o...

Page 62: ...ing in 7 mode then enter options disk auto_assign If your system is operating in Clustered Data ONTAP then enter storage disk option modify autoassign b If your system does not have disk auto assignment enabled or if disk drives in the same stack are owned by both controllers assign disk drive ownership otherwise go to the next step The following substeps address basic disk ownership assignment fo...

Page 63: ...63 8277 North America 00 800 44 638277 Europe or 800 800 80 800 Asia Pacific if you need the RMA number or additional help with the replacement procedure DS4243 DS2246 DS4486 and DS4246 Installation and Service Guide 63 Replacing disk shelf components ...

Page 64: ...cuit 25 feet 12 AWG 10 AWG 8 AWG 8 AWG 50 feet 8 AWG 6 AWG 6 AWG 4 AWG 75 feet 6 AWG 4 AWG 4 AWG 2 AWG 220V single phase 20A circuit 30A circuit 40A circuit 50A circuit 25 feet 14 AWG 12 AWG 12 AWG 10 AWG 50 feet 12 AWG 10 AWG 8 AWG 8 AWG 75 feet 10 AWG 8 AWG 6 AWG 6 AWG The following table lists the approximate equivalent wire gauge AWG to Harmonized Cordage AWG 8 10 12 Harmonized mm mm mm mm mil...

Page 65: ...w VOC VSOURCE VLOAD Kirchoff s Voltage Law Example 1 This example uses the following given values Given VDROP 2V Maximum voltage drop through input source and cable VMIN 40V Minimum input voltage IMAX 8 6A Maximum input current at 40V VOC 48V Measured VLOAD 47 5V Measured RTEST 10Ω 300W DS4243 DS2246 DS4486 and DS4246 Installation and Service Guide 65 Recommended power line sizes ...

Page 66: ...RTOTAL 2 8 6 RTOTAL RTOTAL 2 8 6 RTOTAL 233 x RTEST x 10 For example if you have a 12 gauge wire solid strand at room temperature you use the following calculation Total cable length Total cable length 75 ft RCABLE DC resis 1 128 0017 ft AWG Strand DC resistance1 Ω ft Total cable length2 ft 25 C 75 C 25 C 75 C 12 Solid 0017 0020 75 64 DS4243 DS2246 DS4486 and DS4246 Installation and Service Guide ...

Page 67: ...ge drop through input source and cable VMIN 40V Minimum input voltage IMAX 8 6A Maximum input current at 40V RSOURCE 0 Solution VDROP IMAXRTOTAL RTOTAL VDROP IMAX RTOTAL 2 8 6 RTOTAL 0 233 RTOTAL RSOURCE RCABLE RCABLE RTOTAL RSOURCE RCABLE 0 233 0 RCABLE 0 233 For example if you have a solid strand 12 gauge wire at room temperature you use the following calculation Total cable length Total cable l...

Page 68: ...om Alpha Wire wire manufacturer 2 Combined positive and negative run Using other wire sizes If you need greater length for your combined positive and negative DC wires you must choose a wire with a lower resistance and calculate the total cable length For example a solid 10 AWG has a lower DC resistance than a serial 12 AWG DS4243 DS2246 DS4486 and DS4246 Installation and Service Guide 68 Recommen...

Page 69: ...r knife into the ESD bag Open the ESD bag by hand or cut the top off with a pair of scissors Retain the ESD bag and any packing material for the disk carrier in case you must return it later Note NetApp requires that all returned disk carriers be in an ESD rated bag Always wear an ESD wrist strap grounded to an unpainted surface on your storage enclosure chassis If a wrist strap is unavailable tou...

Page 70: ...not have any SAS cabling errors and to download and run Active IQ Config Advisor to verify SAS cabling is correct Added bullet items to the Hot adding a SAS disk shelf procedure s Before you begin section It is a best practice to have the current version of the Disk Qualification Package DQP installed before hot adding a disk shelf Nondisruptive stack consolidation is not supported Added a bullet ...

Page 71: ...ta ONTAP 8 1 4 or later Data ONTAP 8 2 1 or later or Data ONTAP 8 3 or later to hot swap an IOM Updated the Changing the disk shelf ID procedure note in Step 8 to state that if you decide to change the shelf ID after your storage system is running Data ONTAP you must wait at least 70 seconds instead of 30 seconds before turning the power back on to complete the power cycle Modified the Installing ...

Page 72: ... The past feature update records from the DS4243 and DS2246 guides are captured below Updated the minimum supported Data ONTAP releases for the DS4243 and DS2246 disk shelves to address fixed in Bug ID 509721 and 525950 The minimum supported Data ONTAP releases are the same for DS2246 DS4243 and DS4246 disk shelves DS2246 Feature release date Feature updates May 2011 Removed support for the FAS205...

Page 73: ...release family or Data ONTAP 8 0 or a later release in the 8 x release family SAS and ACP cabling information and procedures moved to the SAS and ACP Cabling Guide for DS4243 DS2246 DS4486 and DS4246 Disk Shelves Cluster Mode commands were included for applicable procedures Photos of the PSUs were updated they now show the correct LED label on the back of the PSUs The PSU LED OK icon was corrected...

Page 74: ...in at any time and without notice NetApp assumes no responsibility or liability arising from the use of products described herein except as expressly agreed to in writing by NetApp The use or purchase of this product does not convey a license under any patent rights trademark rights or any other intellectual property rights of NetApp The product described in this manual may be protected by one or ...

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