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Calculating the length of DC wires

Example 2:

This example uses the following given values.

AWG

Strand

DC resistance(1) [

/ft.]

Total cable length(2)

[ft]

Solid

.0017

.0020

7/20

.0015

.0018

19/25

.0017

.0020

65/30

.0018

.0022

165/34

.0016

.0019

. Data from Alpha Wire, wire manufacturer

Combined positive and negative run

Total cable length

= 75 ft

CABLE

DC resis.

.128Ω

.0017Ω/ft

Given

DROP

= 2V

Maximum voltage drop through input source

and

cable

MIN

= 40V

Minimum input voltage

MAX

= 8.6V

Maximum input current at 40V

SOURCE

≅

Содержание DS14mk2 AT

Страница 1: ...liance Inc 495 East Java Drive Sunnyvale CA 94089 USA Telephone 1 408 822 6000 Fax 1 408 822 4501 Support telephone 1 888 4 NETAPP Documentation comments doccomments netapp com Information Web http ww...

Страница 2: ...Appliance Company DataFabric Data ONTAP FAServer FilerView MultiStore NearStore NetCache SecureShare SnapLock SnapManager SnapMirror SnapMover SnapRestore SnapVault Spinnaker Networks the Spinnaker N...

Страница 3: ...e ATA disk 16 Chapter 3 Replacing Disk Shelf Devices 19 Replacing a disk shelf 20 Removing a disk shelf from a single disk shelf configuration 22 Removing a disk shelf from a loop 24 Installing a disk...

Страница 4: ...iv Table of Contents Calculating the length of DC wires 47 Appendix C Feature Update Record 53 Appendix D Communications Regulations 55 Regulatory notices 56 Index 59...

Страница 5: ...ll computer system hardware and operation Basic understanding of common networking concepts and practices Working familiarity with accepted tools and procedures for installing and operating sensitive...

Страница 6: ...ust follow to avoid personal injury Formatting convention Type of information Italic type Words or characters that require special attention File names and path names Man page names Book titles in cro...

Страница 7: ...and the two input power terminals for the DC power supply must be connected to separate isolated branch circuits To reduce the risk of personal injury or equipment damage allow internal components ti...

Страница 8: ...lliert sein und die beiden Eingangsstromklemmen f r das Gleichstrom Netzteil m ssen an separate und isolierte Abzweigleitungen angeschlossen sein Zum Schutz vor K rperverletzung oder Sachsch den am Ge...

Страница 9: ...Roadmap for the DS14mk2 AT About this chapter This chapter provides a roadmap for installing the DS14mk2 AT disk shelf Topics in this chapter This chapter discusses the following topics Before you be...

Страница 10: ...be 1 Each disk shelf is shipped with its assigned ID set on its back panel You must ensure that the disk shelf has the correct ID number on the label The ID label is on the right side of the disk shel...

Страница 11: ...he direction of the drive bays the ID label on the right side of the disk shelf includes the loop ID The loop ID identifies the disks in the disk shelf The last sheet of the quick reference cards that...

Страница 12: ...4 Before you begin your installation Supported disk drives See the System Configuration Guide at http now netapp com for more information about supported drives and platforms...

Страница 13: ...r existing system or if your new system was not shipped in a system cabinet Installation and Setup Instructions for your storage appliance 3 Connect the disk shelf to the storage appliance Only in the...

Страница 14: ...r storage appliance or Installing a disk shelf on page 26 or Appendix A Hot adding a DS14mk2 AT on page 37 If the system was shipped in a system cabinet you must connect the system cabinet to redundan...

Страница 15: ...ons of the various LEDs on the disk shelf and describes the corrective actions you can take Note The quick reference cards in the slide out tray at the base of the disk shelf describe the function of...

Страница 16: ...your storage appliance console Location of LEDs The following illustration shows the location of the disk shelf ID display and the front panel LEDs Note The Fault and System LEDs are amber The other t...

Страница 17: ...EDs indicate and recommends a corrective action Front operation panel console error messages The following error messages appear on your storage appliance console if an SES element on the front operat...

Страница 18: ...panel Alarm Element 1 failed The alarm on the front operation panel failed Replace the disk shelf Display Element 1 failed The display element on the front operation panel failed Replace the disk she...

Страница 19: ...fferent types of messages that appear on the storage appliance console in response to a command monitoring the AT FCX Location of the module LEDs The AT FCX module is in the middle of the back of the...

Страница 20: ...S element on the AT FCX module fails See Hot Swapping the AT FCX module on page 34 for more information The output displayed on the console is similar to the following example Example Mon Aug 25 21 34...

Страница 21: ...the disk shelf failed Replace the AT FCX module as described in Hot Swapping the AT FCX module on page 34 Temperature sensor 2 not installed or failed Contact storagetechnical support Environmental se...

Страница 22: ...ted with the power supplies from the error messages displayed on your storage appliance console Location of LEDs Each power supply which contains two LEDs is encased in a device carrier and housed at...

Страница 23: ...ailed Contact storagetechnical support to replace the power supply Power supply Element 2 failed The power supply unit on the right at the back of the disk shelf failed Contact storagetechnical suppor...

Страница 24: ...toring the ATA disk The ATA disk has two LEDs The LEDs indicate whether the disk is functioning normally or there are problems with the hardware Location of LEDs The following illustration shows the A...

Страница 25: ...e third sheet of the quick reference cards that come with each disk shelf It shows the disk drive LEDs normal and fault conditions and recommends corrective actions Note The rest of the third sheet of...

Страница 26: ...18 Monitoring the ATA disk...

Страница 27: ...ow to replace disk shelves in a rack disks in a disk shelf and other devices Topics in this chapter This chapter discusses the following topics Replacing a disk shelf on page 20 Replacing a disk in a...

Страница 28: ...nformation about hot adding a disk shelf see Appendix A Hot adding a DS14mk2 AT on page 37 Disk shelf cabling requirements The following table lists the cabling requirements for the disk shelves Cable...

Страница 29: ...d information For details about removing a disk shelf from a rack see the following topics Removing a disk shelf from a single disk shelf configuration on page 22 Removing a disk shelf from a loop on...

Страница 30: ...isplay at the front of your storage appliance displays the following message Halted 4 Turn off the power switch on the disk shelf 5 Disconnect the two disk shelf power cords from the disk shelf 6 Disc...

Страница 31: ...Chapter 3 Replacing Disk Shelf Devices 23 10 Go to Installing a disk shelf in a rack on page 26 to add the replacement shelf Step Action...

Страница 32: ...displays the following message Halted 4 Turn off the power switch on the disk shelf 5 Disconnect the two disk shelf power cords from the disk shelf that you are going to remove 6 Disconnect and remov...

Страница 33: ...isk shelf to the storage appliance 2 Remove any Fibre Channel cables that are connected to the output port of the last disk shelf in the loop Caution Failure to do this step causes an open loop panic...

Страница 34: ...e following steps WARNING WARNING You must install each disk shelf with either the two post telco tray kit or the four post rail kit that came in your shipment package If you choose to mid mount the d...

Страница 35: ...e the disk shelf 2 Select the correct label from the envelope identified in Step 2 and attach it to the right flange of the new disk shelf 7 If you are adding multiple disk shelves on the same loop re...

Страница 36: ...er disk shelves or to your storage appliance See Disk shelf cabling requirements on page 20 for additional requirements Note AT FCX B is in the lower middle of the back of the disk shelf A FAS270c or...

Страница 37: ...disks into a half empty disk shelf replace or install the disks one at a time to allow your storage appliance to recognize the existence of each new disk Removing a disk To remove a disk complete the...

Страница 38: ...is using the grounding leash 2 Orient the device carrier so that the release mechanism is at the top 3 Insert the disk into the guide slot in the disk shelf and firmly push it in until it engages the...

Страница 39: ...the same disk shelf replace them one at a time to avoid powering down the disk shelf Removing a power supply To remove a power supply complete the following steps Step Action 1 Put on the antistatic...

Страница 40: ...ns first negative then positive then ground For negative ground installations first positive then negative then ground 3 Press the cam mechanism levers toward each other to release the power supply ha...

Страница 41: ...connector 3 Press the cam mechanism levers toward each other to engage the power supply into place 4 If the disk shelf has Then An AC power supply 1 Plug the power cord into the power receptacle and f...

Страница 42: ...e backplane at the back of the disk shelf enclosure Assumptions about this procedure The assumptions about this procedure are that the AT FCX modules on the disk shelf use multipath connections to you...

Страница 43: ...adaptername The Data ONTAP System Administrator s Guide 7 0 1 or later provides more information about these commands 4 Disconnect the module that you are removing from the loop cabling 5 Using the t...

Страница 44: ...36 Hot Swapping the AT FCX module...

Страница 45: ...follow this recommendation may cause the loop to crash Error messages The following error messages appear on your storage appliance console if your attempt at hot adding the DS14mk2 AT is unsuccessful...

Страница 46: ...38 Hot adding a DS14mk2 AT Hot adding a disk shelf to an existing loop on page 39 Hot adding a disk shelf to an existing adapter in your system on page 42...

Страница 47: ...ONTAP 7 0 4 or later Note Earlier versions of the Data ONTAP 7 0 x are not supported Hot adding a disk shelf to an existing loop To hot add a disk shelf to an existing loop complete the following ste...

Страница 48: ...speed setting on the module to a 1 Gb See the following illustration Note The FAS270 and FAS270c function at a 1 Gb loop speed An incorrectly set loop speed on the DS14mk2 AT results in an open loop c...

Страница 49: ...connect it to the new shelf you end up with an open loop panic 8 Connect one end of the cable to the AT FCX A Input on the new disk shelf 9 Connect the other end of the provided cable to the AT FCX A...

Страница 50: ...iance Step Action 1 Ground yourself to the system chassis using the grounding leash 2 Install the disk shelf Follow Step 3 through Step 9 of Installing a disk shelf on page 26 Since the disk shelf is...

Страница 51: ...lf 8 Connect one end of the provided cable to the adapter in your storage appliance 9 Verify that all the cables are securely fastened Caution Poorly secured cables cause the storage appliance to pani...

Страница 52: ...44 Hot adding a disk shelf to an existing adapter in your system...

Страница 53: ...endix This appendix describes how to determine the power line lengths running from the storage appliance to the power source Topics in this appendix This appendix discusses the following information R...

Страница 54: ...ists the recommended conductor size for 2 voltage drop for a particular distance in feet taken from the Radio Engineer s Handbook The following table list the approximate equivalent wire gauge America...

Страница 55: ...ositive and negative wires that connect the DC power supply to the DC source Example 1 This example uses the following given values VSOURCE Voltage across the internal source resistance VOC Voltage ac...

Страница 56: ...g the length of DC wires Given VDROP 2V Maximum voltage drop through input source and cable VMIN 40V Minimum input voltage IMAX 8 6V Maximum input current at 40V VOC 48V Measured VLOAD 47 5V Measured...

Страница 57: ...use the following calculation VLOAD I RTEST I VLOAD RTEST VOC VSOURCE VLOAD VOC IRS VLOAD RS VOC VLOAD I RS VOC VLOAD VLOAD RTEST RS VOC VLOAD VLOAD 48V 47 5V 47 5V 0 105 RTOTAL RCABLE RSOURCE RCABLE...

Страница 58: ...7 20 0015 0018 85 71 12 19 25 0017 0020 75 64 12 65 30 0018 0022 71 58 12 165 34 0016 0019 80 67 1 Data from Alpha Wire wire manufacturer 2 Combined positive and negative run Total cable length Total...

Страница 59: ...e lengthb ft 25 C 75 C 25 C 75 C 12 Solid 0017 0020 136 116 12 7 20 0015 0018 155 129 12 19 25 0017 0020 136 116 12 65 30 0018 0022 129 105 12 165 34 0016 0019 145 122 Solution VDROP IMAXRTOTAL RTOTAL...

Страница 60: ...nger run for your combined positive and negative DC wires 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 solid 1...

Страница 61: ...the release in which it was implemented and all subsequent releases unless otherwise specified Feature updates Feature first implemented in Feature release date Initial release of this guide Data ONTA...

Страница 62: ...54 Feature Update Record...

Страница 63: ...Communications Regulations 55 D Communications Regulations About this appendix This appendix lists the regulatory notices you need to be aware of when installing and operating your Network Appliance...

Страница 64: ...ance with Part 15 of CFR 47 This equipment has been tested and found compliant with Part 15 of the CFR 47 rules for Class A digital devices These rules are designed to provide reasonable protection fr...

Страница 65: ...a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures Voluntary Control Council for Interference by Information Technology E...

Страница 66: ...58 Regulatory notices...

Страница 67: ...AT FCX defined v audience v C command fcstat device_map 41 halt 22 24 storage disable 35 storage enable 35 console error messages AT FCX 12 cooling element element 1 and 2 15 front operation panel 9 O...

Страница 68: ...installing in a disk shelf 32 interpreting LEDs power supply 17 location of LEDs 14 power cord with 33 power switch for 33 removing from a disk shelf 31 replacing 31 power supply error messages coolin...

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