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Appendix B: Recommended Power Line Sizes

81

Calculating the length of DC wires

Use these variable
definitions

To calculate the maximum combined length of the positive and negative wires
between the DC source and DC power supplies, use the following variable
definitions:

How to calculate the
length

The following two examples show how to calculate the maximum combined
length of the positive and negative wires that connect the DC power supply to the
DC source.

Example 1:

This example uses the following given values.

◆

V

SOURCE

Voltage across the internal source

resistance

◆

V

OC

Voltage across an open circuit of the

input source

◆

V

LOAD

Voltage across a load, R

TEST

,

connected to the input source

◆

R

TEST

Test resistor of known value, that is,

10Ω

at

300W

◆

R

CABLE

DC resistance of the cable at a given

length

◆

R

SOURCE

DC resistance of the source

◆

R

TOTAL

Combined DC resistance of the cable

and DC source:

R

TOTAL

= R

SOURCE

+ R

CABLE

◆

V = IR

Ohm’s Law

◆

V

OC

= V

SOURCE

+ V

LOAD

Kirchoff’s Voltage Law

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Содержание DiskShelf 14mk2 FC

Страница 1: ...vice Guide Network Appliance 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 I...

Страница 2: ...arks of Network Appliance Inc in the U S A and or other countries Cryptainer Cryptoshred Datafort and Decru are registered trademarks and Lifetime Key Management and OpenKey are trademarks of Decru a...

Страница 3: ...g the Fibre Channel disk 29 Chapter 3 Replacing Disk Shelf Devices 33 Replacing a disk shelf 34 Removing a disk shelf from a single disk shelf configuration 37 Removing a disk shelf from a loop 39 Ins...

Страница 4: ...o an existing adapter in your system 74 Appendix B Recommended Power Line Sizes 79 Recommended AC power line sizes 80 Calculating the length of DC wires 81 Appendix C Feature Update Record 87 Appendix...

Страница 5: ...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 tim...

Страница 6: ...liert 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 Ger...

Страница 7: ...sks within a disk shelf ESH refers to the device with the enclosure services processor that communicates the environmental data of the disk shelf to the filer and that provides high availability shoul...

Страница 8: ...able lists different character formats used in this guide to set off special information Formatting convention Type of information Italic type Words or characters that require special attention Placeh...

Страница 9: ...contains instructions that you must follow to avoid damage to the equipment a system crash or loss of data WARNING WARNING A warning contains instructions that you must follow to avoid personal injur...

Страница 10: ...x Preface...

Страница 11: ...apter This chapter provides a roadmap for installing the DS14 DS14mk2 FC and DS14mk4 FC disk shelf Topics in this chapter This chapter discusses the following topics Differences between the various di...

Страница 12: ...switch The 1 Gb loop speed setting must be used if the disk shelf is connected to the FAS270 The 2 Gb loop speed setting must be used if there is any component on any part of the loop that is only cap...

Страница 13: ...ed with all shelf models ESH4 Does not support the use of ESH4 ESH4 functions at 1 Gb or 2 Gb loop speed depending on the system configuration Does not have a terminate switch ESH4 functions at 1 Gb 2...

Страница 14: ...disk shelf IDs in each loop must start at 1 The ID of a single disk shelf must be 1 Note When connecting a DS14 or DS14mk2 FC with LRCs to a preexisting mixed shelf loop of FC7 FC8 and or FC9 the DS14...

Страница 15: ...ower cycle the disk shelf for the new ID to take effect The disk shelf ID display on the front of the disk shelf blinks until you power cycle the disk shelf Note If you enter a shelf ID that is not fr...

Страница 16: ...on 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 sheets of the quick reference cards that come wit...

Страница 17: ...Guide at http now netapp com for more information on supported drives and platforms Drive bay requirements For enclosure services monitoring to work drive bays 0 and 1 must contain a disk This requir...

Страница 18: ...oes 1 Storage controller Uses a subset of SCSI 3 commands to monitor the disk shelf for data related to disk presence temperature power supply units and fan status 2 Storage controller Sends the comma...

Страница 19: ...not shipped in a system cabinet Installation and Setup Instructions for your storage controller 3 Connect the disk shelf to the storage controller Only in the following scenarios If the disk shelf in...

Страница 20: ...rce Yes Installation and Setup Instructions for your storage controller Installing a disk shelf in a rack on page 41 or Appendix A Hot adding a DS14 DS14mk2 FC DS14mk4 FC on page 68 If the system was...

Страница 21: ...the various LEDs on the disk shelf Note The quick reference cards in the slide out tray at the base of the disk shelf describe the functions of each LED on the disk shelf and the suggested course of...

Страница 22: ...our storage controller 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 23: ...ront operation panel The following illustrations are of the first sheets of the quick reference cards that come with your disk shelf They shows the normal and fault conditions that the LEDs indicate a...

Страница 24: ...ails For information about replacing a disk shelf see Replacing a disk shelf on page 34 Error message Action required Temperature sensor Element 1 failed The temperature sensor on the front operation...

Страница 25: ...ter 2 Monitoring the Disk Shelf 15 Display Element 1 failed The alarm on the front operation panel failed Contact Network Appliance customer service to replace the disk shelf Error message Action requ...

Страница 26: ...ed LED lights up to indicate the speed of operation You can also identify any hardware failure associated with the module from the error messages displayed on your storage controller console This sect...

Страница 27: ...stration shows the location of the LEDs for an LRC with an optical input interface and copper output interface The following illustration shows the location of the LEDs for an ESH The following illust...

Страница 28: ...for future functionality LED status on the modules The following illustrations are of the second sheets of the quick reference cards that come with your disk shelf The rest of the second sheet of the...

Страница 29: ...ee Replacing an LRC ESH ESH2 ESH4 module on page 51 Error message Action required Temperature sensor Element 2 failed The temperature sensor on LRC module A on the top back of the disk shelf failed Co...

Страница 30: ...and ESH4 ESH2 and ESH4 This error message occurs during the process of hot upgrading SES electronics Element 1 failed Module A on the top back of the disk shelf failed Contact Network Appliance custo...

Страница 31: ...point but it is not possible now Even if traffic is flowing through the Fibre Channel loop contact Network Appliance customer service to replace the ESH ESH2 ESH4 SES electronics Element 1 not instal...

Страница 32: ...t Clock Delta Insert Count Stall Count Util LIP Count IN OUT 32 33 34 35 36 37 38 39 40 41 42 43 44 45 0 1 2 3 4 5 6 7 8 9 10 11 12 13 OK TERM OK OK OK OK OK OK OK OK BYP TBI OK OK EMPTY OK OK 8 8 10...

Страница 33: ...XPORT ERROR Communication with the ESH ESH2 ESH4 is not possible Shelf state Description OK Terminate switch is in the Off position This DS14 DS14mk2 FC is connected to another DS14 DS14mk2 FC in the...

Страница 34: ...comma loss of signal BYP RPRT Port bypassed due to redundant port connection BYP STALL Port bypassed due to excessive stall errors BYP WRD Port bypassed due to excessive word errors BYP CRC Port bypa...

Страница 35: ...f drive was bypassed Invalid Word Count Number of times this port saw invalid FC AL words transmitted Is zero under normal operation Removal and addition of disks and a reset of the adapter might gene...

Страница 36: ...e to bypass this port Yes if drive was bypassed Utilization Relative use of this port versus other ports in the ESH ESH2 ESH4 This value does not reflect the real time use of what the ports are curren...

Страница 37: ...sociated with the power supplies from the error messages displayed on your storage controller console Location of LEDs Each power supply which contains two LEDs is encased in a device carrier and hous...

Страница 38: ...ppliance customer service 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 Network Appliance customer service t...

Страница 39: ...ng the Fibre Channel disk The Fibre Channel 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 illustra...

Страница 40: ...s pulsing every half second For DS14 and DS14mk2 FC The following illustration is a correction of the third sheet of the quick reference cards that come with your disk shelf Reinsert drive Replace dri...

Страница 41: ...Chapter 2 Monitoring the Disk Shelf 31 For DS14mk4 FC...

Страница 42: ...32 Monitoring the Fibre Channel disk...

Страница 43: ...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 34 Replacing a disk in a dis...

Страница 44: ...A Hot adding a DS14 DS14mk2 FC DS14mk4 FC on page 68 Caution Hot removal of disk shelves is not supported Shutdown of filer FAS appliance is required to remove shelves from system Disk shelf cabling...

Страница 45: ...modules None HSSDC2 to HSSDC2 To connect disk shelves with ESH modules None SC to LC To connect storage controller with optical adapters to disk shelves with LRC modules None HSSDC to DB9 To connect s...

Страница 46: ...For detailed information about removing a disk shelf from a rack see the following topics Removing a disk shelf from a single disk shelf configuration on page 37 Removing a disk shelf from a loop on p...

Страница 47: ...ler FAS appliance Shut down the filer FAS appliance by entering the following command at the console halt Caution Always use the halt command to perform a clean shutdown NetCache appliance 1 From the...

Страница 48: ...grounding strap connecting the disk shelf and storage controller 8 Use a Phillips screwdriver to remove the screws securing the disk shelf to the telco tray the mid mount bracket or the four post rac...

Страница 49: ...iance Shut down the filer FAS appliance by entering the following command at the console halt Caution Always use the halt command to perform a clean shutdown NetCache appliance 1 From the Appliance Ma...

Страница 50: ...helf is very heavy when fully loaded it is advised that at least two people remove the disk shelf 10 If you are Then Not installing a replacement disk shelf for the disk shelf you removed and it is th...

Страница 51: ...information 2 Verify that you received the envelope with the disk shelf ID labels 3 Ground yourself to the system chassis using the grounding leash 4 Use the rail kit installation flyer in the rail k...

Страница 52: ...n Examples of these components are the DS14mk2FC SFPs HBAs or drives For the 4 Gb loop speed setting to be used all components on any part of the loop must be of 4 Gb capable Examples of these compone...

Страница 53: ...Shelf Devices 43 11 Connect the two disk shelf power cords to each disk shelf that you are adding 12 Turn on the power first to the disk shelves and then to the storage controller 13 Reboot the storag...

Страница 54: ...autosupport warning message is then sent DISK FAIL Bypassed by ESH Preparing to replace a disk Before you replace a disk in a disk shelf you must first check the disk shelf to ensure that after you r...

Страница 55: ...ult LED on the disk to illuminate For more information about LEDs see Monitoring the Fibre Channel disk on page 29 For more information about disk commands see the Data ONTAP System Administrator s Gu...

Страница 56: ...peat Step 1 through Step 4 Step Action Step Action 1 Put on the antistatic wrist strap and grounding leash 2 Orient the device carrier so that the release mechanism is at the top 3 Insert the device c...

Страница 57: ...disk shelf Removing a power supply To remove a power supply complete the following steps Step Action 1 Put on the antistatic wrist strap and grounding leash 2 If you have a disk shelf with Then An AC...

Страница 58: ...sm levers in the middle of the power supply to release it The following figure shows how to release the CAM mechanism At the top of the rear of the unit Using your thumb and index finger press the CAM...

Страница 59: ...o hands to support its weight Step Action Step Action 1 Put on the antistatic wrist strap and grounding leash 2 If the power supply CAM mechanism is Then slide the power supply in the power supply bay...

Страница 60: ...er supply 1 Plug the power cord into the power receptacle and fasten it with the clamp 2 Plug the other end of the power cord into a grounded AC power source A DC power supply 1 Connect the positive n...

Страница 61: ...for Channel B Note The Input and Output ports on module A on the disk shelves are inverted from module B Connectors in a module The modules have the following connectors For detailed information This...

Страница 62: ...le that is connected to the Fibre Channel loop complete the following steps Step Action 1 Put on the antistatic wrist strap and grounding leash 2 If the disk shelf connects to a Then Filer FAS applian...

Страница 63: ...ect the module from the Fibre Channel cabling 5 Using the thumb and index finger of both hands press the levers on the CAM mechanism on the module to release it 6 Pull the module out of the disk shelf...

Страница 64: ...e requirements to support the disk shelf and module combination See the System Configuration Guide at http now netapp com for more information 2 Put on the antistatic wrist strap and grounding leash 3...

Страница 65: ...ESH2 with an ESH4 requires that you perform a minimum upgrade to Data ONTAP 6 4 4 or later and replace both modules in the disk shelf A hot swap of an ESH with an ESH4 is not supported with NetCache...

Страница 66: ...nd to disable the loop in which the failed module is a connection storage disable adapter adaptername The Data ONTAP Storage Administration Guide 7 0 or later provides more information about these com...

Страница 67: ...ce the terminate switch to the Off position For ESH A it is in the down position and for ESH B it is in the up position An ESH2 or an ESH4 with like modules Go to Step 5 5 If you are hot swapping Then...

Страница 68: ...age the connector 8 Use the appropriate cable to reconnect both modules of the disk shelf to the other disk shelves or to your storage controller See Disk shelf cabling requirements on page 34 for add...

Страница 69: ...ailable at 1 Gb loop speed LRC to ESH ESH2 hot upgrade only is supported Caution An ESH4 upgrade is not supported ESH ESH2 to LRC hot downgrade is supported Downgrades from ESH4 are not applicable DS1...

Страница 70: ...2 Put on the antistatic wrist strap and grounding leash 3 From the storage controller console enter the following command to disable Loop A storage disable adapter adaptername 4 If you are Then Hot up...

Страница 71: ...thumb and index finger of both hands press the levers on the CAM mechanism on the module to release it and pull it out of the disk shelf 7 Wait for the following console message Module x is not instal...

Страница 72: ...on shelf As long as only the modules in loop A are upgraded you also receive the following error message Element 1 component is from a different product family This is an unsupported configuration 12...

Страница 73: ...em About this appendix This appendix discusses how to install a DS14 DS14mk2 FC DS14mk4 FC into an existing system Topics in this appendix This appendix discusses the following topics Adding a disk sh...

Страница 74: ...RCs Adding the disk shelf To add a DS14 DS14mk2 FC disk shelf into an existing mixed shelf loop on a storage controller complete the following steps WARNING WARNING You must install each disk shelf wi...

Страница 75: ...the front of your NetApp appliance displays the following message Halted 6 If the last disk shelf in the loop is Then An FC7 or FC8 disk shelf 1 Remove the terminator from the Output Terminator conne...

Страница 76: ...lf installed above an FC9 disk shelf 11 If the DS14 DS14mk2 FC Then Is the only disk shelf being added to the loop Turn the terminate switches on LRCs A and B to the On position Note Because LRC B on...

Страница 77: ...the disk shelf for the new ID to take effect The disk shelf ID display on the front of the disk shelf blinks until you power cycle the disk shelf 3 Select the correct label from the envelope identifie...

Страница 78: ...mk4 FC the following requirements must be met Error messages The following error messages appear on your storage controller console if your attempt at hot adding the DS14 DS14mk2 FC is unsuccessful If...

Страница 79: ...switch on LRC ESH A and LRC ESH B on the new disk shelf are not in the On position The shelf to shelf cable between the now second to last disk shelf and the newly added disk shelf is defective or is...

Страница 80: ...your filer Step Action 1 Verify that your NetApp appliance meets the minimum software requirements to support the disk shelf and module combination See the System Configuration Guide at http now neta...

Страница 81: ...e used if there is any component on any part of the loop that is only capable of 2 Gb operation Examples of these components are the DS14mk2FC SFPs HBAs or drives For the 4 Gb loop speed setting to be...

Страница 82: ...the disk shelf you added has Then LRC or ESH modules Turn on the power to the disk shelf Caution You must power up the new disk shelf before you connect it to the last disk shelf in the loop because...

Страница 83: ...e terminate switch of the newly added disk shelf to the On position for LRC ESH A down and LRC ESH B up Caution Failure to place the terminate switches in the On position causes the storage controller...

Страница 84: ...and Module B connects to Port C or Port D Hot adding a disk shelf to an existing adapter To hot add a disk shelf to an existing loop complete the following steps Caution To hot add disk shelves to a...

Страница 85: ...FAS270 or the DS14 The 2 Gb loop speed setting must be used if there is any component on any part of the loop that is only capable of 2 Gb operation Examples of these components are the DS14mk2FC SFP...

Страница 86: ...0 or the DS14 The 2 Gb loop speed setting must be used if there is any component on any part of the loop that is only capable of 2 Gb operation Examples of these components are the DS14mk2FC SFPs HBAs...

Страница 87: ...ange of the new disk shelf 11 If the disk shelf you added has Then ESH2 ESH4 modules Turn on the power to the disk shelf and you must wait 30 seconds for the shelf electronics to finish initializing L...

Страница 88: ...minate switch of the newly added disk shelf to the On position for LRC ESH A down and LRC ESH B up Caution Failure to place the terminate switches in the On position causes the storage controller to p...

Страница 89: ...endix This appendix describes how to determine the power line lengths running from the storage controller to the power source Topics in this appendix This appendix discusses the following information...

Страница 90: ...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 91: ...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 92: ...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 93: ...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 94: ...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 95: ...e length2 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 96: ...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 97: ...6 1 1 July 2001 Update to include hot adding of disk shelves to NetCache appliances NetCache 5 2 August 2001 Update to include FAS900 series Data ONTAP 6 3 August 2002 Update to include DS14mk2FC Upda...

Страница 98: ...the System Configuration Guide at http now netapp com for information February 2007 Update to specify loop speed usage requirements Data ONTAP 6 4 4 and later for selected platforms See the System Con...

Страница 99: ...Communications Regulations 89 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 100: ...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 101: ...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 102: ...llowing standards EN 60950 2002 Information Technology Equipment Safety EN 55022 1998 Emissions Requirements for Information Technology Equipment EN 50024 1998 Immunity Requirements for Information Te...

Страница 103: ...ngth of 81 device carrier defined vii differences between the disk shelves drives in drive carriers 3 ESH 3 ESH2 3 ESH4 3 LRC 3 power supplies 3 shelf chassis 2 disk drive compatibility 7 disk shelf I...

Страница 104: ...on panel 12 power supply 27 loops defined vii LRC error messages SES electronics element 1 and 2 20 Temperature sensor element 2 and 3 19 LRC module defined vii LRC ESH ESH2 console error messages 19...

Страница 105: ...44 LRC ESH ESH2 modules 51 power supplies 47 requirements drive bay 7 rules for drive bays 7 S shelf state messages FAILED 23 INIT REQD 22 MISSING 23 OFFLINE 22 ONLINE 22 special messages ix storage...

Страница 106: ...96 Index...

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