Dell PowerVault MD1000 Hardware Owner'S Manual Download Page 4

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Contents

Removing and Installing Drives

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Removing Drives from the Enclosure

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Installing SAS Drives in the Enclosure

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Installing SATA Drives in the Enclosure

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Removing and Installing an EMM

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Removing an EMM

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing an EMM

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing an EMM Module Cover in an Empty Bay

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Installing and Removing an EMM Module Cover

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Removing and Installing the Power Supply/Cooling Fan Module

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Removing a Power Supply/Cooling Fan Module

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Installing a Power Supply/Cooling Fan Module

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Removing and Installing the Control Panel

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Removing the Control Panel

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Installing the Control Panel

. . . . . . . . . . . . . . . . . . . . . . . . .

Removing and Installing the Midplane

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Troubleshooting Your Enclosure

Safety First—For You and Your Enclosure

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Start-Up Routine

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting a Loss of Communication Condition

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Troubleshooting External Connections

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Troubleshooting a Wet Enclosure

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Troubleshooting a Damaged Enclosure

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Troubleshooting Power Supplies

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Troubleshooting Enclosure Cooling Problems

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Troubleshooting a Fan

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Troubleshooting SAS and SATA Drives

. . . . . . . . . . . . . . . . . . . . .

Troubleshooting Enclosure Connections

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Summary of Contents for PowerVault MD1000

Page 1: ...w w w d e l l c o m s u p p o r t d e l l c o m Dell PowerVault MD1000 Storage Enclosure Hardware Owner s Manual ...

Page 2: ...tsoever without the written permission of Dell Inc is strictly forbidden Trademarks used in this text Dell the DELL logo PowerEdge PowerVault and Dell OpenManage are trademarks of Dell Inc Microsoft Windows and MS DOS are registered trademarks of Microsoft Corporation UNIX is a registered trademark of The Open Group in the United States and other countries EMC is a registered trademark of EMC Corp...

Page 3: ...e Failover When Two EMMs are Installed 16 EMM Thermal Shutdown 17 Power Supply and Cooling Fan Features 17 Enclosure Alarms 18 2 Operating Your Storage Enclosure Before You Begin 19 Cabling Your Enclosure for Unified or Split Mode 19 Connecting the Enclosure 20 Changing Your Enclosure s Operating Mode 21 Managing Your Storage Enclosure 22 Downloading Firmware 23 3 Installing Enclosure Components R...

Page 4: ... 35 Installing a Power Supply Cooling Fan Module 36 Removing and Installing the Control Panel 36 Removing the Control Panel 36 Installing the Control Panel 37 Removing and Installing the Midplane 38 4 Troubleshooting Your Enclosure Safety First For You and Your Enclosure 41 Start Up Routine 41 Troubleshooting a Loss of Communication Condition 41 Troubleshooting External Connections 43 Troubleshoot...

Page 5: ... Service 50 Automated Order Status Service 50 Technical Support Service 50 Dell Enterprise Training and Certification 51 Problems With Your Order 51 Product Information 51 Returning Items for Warranty Repair or Credit 51 Before You Call 52 Contacting Dell 52 Glossary 71 Index 79 ...

Page 6: ...6 Contents ...

Page 7: ... setting up your enclosure and technical specifications The Dell OpenManage Server Administrator documentation provides information on managing your storage solution using the Storage Management Service within Server Administrator NOTE Online configuration enclosure status and active event notification require Server Administrator version 4 5 1 or later CDs included with your enclosure provide doc...

Page 8: ...he Front Bezel Table 1 1 Front Bezel Indicators Item LED Indicator LED Icon Condition 1 Split mode green When lit indicates the enclosure is in split mode otherwise the enclosure is in unified mode For more information on both modes see Unified Mode and Split Mode 2 Power green When lit at least one power supply is supplying power to the enclosure 3 Enclosure status blue amber Steady amber Power i...

Page 9: ...Panel Features 1 enclosure status LED 4 power LED 7 drives 15 2 drive activity LED 5 split mode LED 3 drive status LED 6 enclosure mode switch Table 1 2 Front Panel Components Component Icon Condition Enclosure status LED blue amber Steady amber Power is on and enclosure is in reset state Steady blue Power is on and enclosure status is OK Flashing blue Host server is identifying the enclosure Flas...

Page 10: ...n When lit indicates the enclosure is in split mode configuration otherwise the enclosure is in unified mode For more information see Unified Mode and Split Mode Enclosure mode switch When set in its uppermost position at power on the enclosure is configured in unified mode when set in its lowermost position at power on the enclosure is configured in split mode NOTE This switch must be set prior t...

Page 11: ...er supply cooling fan module For more information see Power Supply and Cooling Fan Features Table 1 3 Drive Carrier Status LEDs LED Description Off Slot empty drive not yet discovered by server or an unsupported drive is present Steady green Drive is online Green flashing 250 milliseconds ms Drive is being identified or is being prepared for removal Green flashing On 400 ms Off 100 ms Drive rebuil...

Page 12: ...osure If only one EMM is installed it must be in the primary EMM bay see Figure 1 4 and a blank module cover must be installed in the secondary EMM bay see Installing an EMM Module Cover in an Empty Bay Figure 1 5 shows a single EMM as it appears from the rear of the enclosure The EMM connects to the enclosure via the enclosure midplane see Removing and Installing an EMM EMM connectors and compone...

Page 13: ...re unified mode only 3 In Port Link Status LED green amber Green All links into the port are connected Amber One or more links into the port are not connected Off Interface is not active 4 SAS Port Out Out Provide SAS connection for cabling to the next downchain expansion enclosure in a daisy chain unified mode only NOTE The SAS Out port is disabled if the enclosure is running split mode For more ...

Page 14: ... on whether you select the enclosure to run in either unified or split mode 6 EMM Status LED green amber Solid green EMM is functioning properly Solid amber The enclosure did not boot or was not properly configured Off EMM did not boot is not properly configured or communication between the EMM and the server is lost Green flashing 250 ms Firmware download in progress Amber flashing On 250 ms Off ...

Page 15: ...About Your System 15 Figure 1 6 Drive Slot Distribution in Split Mode vs Unified Mode EMM Control in Split Mode EMM Control in Unified Mode ...

Page 16: ...lements can be transferred from one EMM to another in the event of an EMM failure A failover occurs whenever communication is lost between an EMM and its peer In the event of a peer EMM failure the surviving EMM activates the amber status LED of the failed EMM and holds it in reset The surviving EMM then takes over the responsibility of enclosure management which includes monitoring and control of...

Page 17: ...oling fans to operate to avoid overheating CAUTION A power supply cooling fan module can be removed from a powered on enclosure however the enclosure will shut down if overheating occurs A power supply cooling fan module can be replaced without powering down the enclosure For information on removing and replacing the modules see Removing and Installing the Power Supply Cooling Fan Module Figure 1 ...

Page 18: ...nt Table 1 5 Power Supply Cooling Fan Module LED Indicators LED type LED color LED Icon Function DC power Green On DC output voltages are within specifications Off No power or voltages not within specifications Power supply cooling fan fault Amber On DC output voltages are not within specifications or one or both fans are in fault Off No fault condition is present AC power Green On AC input voltag...

Page 19: ...lation Instructions Product Information Guide for important safety regulatory and warranty information Installation and Server Management CD version 4 5 1 or later Server Administrator documentation Readme files Cabling Your Enclosure for Unified or Split Mode How you cable your enclosure to your host controller depends on the configuration you choose unified or split mode A unified configuration ...

Page 20: ...he external SAS cable s to the EMM SAS connector on the storage enclosure see Figure 1 5 and Figure 2 1 and to the RAID controller on the host system See your RAID controller documentation to ensure that the controller is properly installed If you are configuring your enclosure in unified mode connect the external SAS cable from the host controller to the In port on the EMM module of the first enc...

Page 21: ...n the on off switches on all power supply cooling fan modules see Figure 1 8 7 Turn on power to the host system 8 Check the LED indicators on the front and back of the storage enclosure If any amber fault indicators are illuminated see Troubleshooting Your Enclosure Changing Your Enclosure s Operating Mode If you decide to change the operating mode of your enclosure after initial configuration for...

Page 22: ...Storage Enclosure Disk storage within the enclosure can be configured using either the PERC 5 E Ctrl R BIOS firmware or Server Administrator For optimal management and serviceability of your enclosure Dell recommends use of Server Administrator NOTE Online configuration enclosure status and active event notification is supported with Server Administrator version 4 5 1 or later only Dell OpenManage...

Page 23: ...e Package available at support dell com NOTE Firmware download may take several minutes per enclosure During this time the host may lose communication with the enclosure After the download completes a reboot of the host server is required If loss of communication problems occur refer to Troubleshooting a Loss of Communication Condition ...

Page 24: ...24 Operating Your Storage Enclosure ...

Page 25: ...er Wrist grounding strap as explained in the safety instructions found in your Product Information Guide Removing and Replacing the Front Bezel To access the drives in your enclosure you must remove the optional front enclosure bezel If your enclosure does not have this bezel skip this section To remove the bezel 1 If the bezel is locked insert the bezel locking key in the bezel lock If the bezel ...

Page 26: ...hutting down your enclosure This section describes how to remove and install drives in your storage enclosure CAUTION Only trained service technicians are authorized to remove the enclosure cover and access any of the components inside the enclosure Before performing any procedure see your Product Information Guide for complete information about safety precautions working inside the enclosure and ...

Page 27: ... Administrator documentation for more information CAUTION Always wear a wrist grounding strap when handling equipment with static sensitive components 1 Use Server Administrator to prepare the drive for removal 2 Wait until the LED indicators on the drive carrier stop flashing 3 Squeeze the release mechanism on the front of the drive carrier see Figure 3 2 Figure 3 2 Installing and Removing Drives...

Page 28: ... into the carrier 1 If you are replacing a SAS drive in the carrier remove the four screws that secure the drive to its carrier and remove the drive see Figure 3 3 2 Position the replacement drive into the drive carrier with the drive s controller board facing the carrier shield as shown in Figure 3 3 3 From the rear of the carrier slide the drive into the carrier until it contacts the stop tab at...

Page 29: ...open carrier handle makes contact with the chassis face plate 7 Rotate the carrier handle to the closed position while continuing to push the carrier into the slot The status LED indicator see Table 1 3 for description will display a steady green if the drive is inserted properly If the indicator is not illuminated see Troubleshooting SAS and SATA Drives As the drive rebuilds the drive carrier LED...

Page 30: ...e carrier 1 If you are replacing a drive in the carrier remove the interposer unclipping it from the carrier Remove the four screws that secure the drive to its carrier and remove the drive see Figure 3 4 2 Position the replacement drive into the drive carrier with the drive s controller board facing the carrier shield as shown in Figure 3 4 3 Align the drive mounting holes with the carrier mounti...

Page 31: ...dle makes contact with the chassis face plate 7 Rotate the carrier handle to the closed position while continuing to push the carrier into the slot The status LED indicator see Table 1 3 for description will display a steady green if the drive is inserted properly If the indicator is not illuminated see Troubleshooting SAS and SATA Drives As the drive rebuilds the drive carrier LED flashes green t...

Page 32: ...inserting an EMM that is connected to a host will cause the host to lose communication with the enclosure and will require a reboot of the host server For more information see Troubleshooting a Loss of Communication Condition NOTICE To prevent damage to your enclosure you should wear a wrist grounding strap while performing the following procedures See your Product Information Guide for safety inf...

Page 33: ...in toward the enclosure until the module is retracted into the slot and secure 4 If necessary update the firmware for your EMM s See the Dell Support website at support dell com for the latest information on firmware updates NOTE If you have two EMMs installed both must be running the same firmware level For information on updating firmware see Downloading Firmware For information on EMM connectio...

Page 34: ...de the cover out of the EMM bay Figure 3 6 Removing and Installing an EMM Module Cover Removing and Installing the Power Supply Cooling Fan Module Your enclosure supports two separate modules containing an integrated power supply and two cooling fans While the enclosure can operate temporarily with only one functional power supply both cooling modules with two fans each must be present for proper ...

Page 35: ...ply cooling fan module is installed 1 Turn off the power supply you intend to remove using the on off switch 2 Unplug the AC power cable 3 Using a Phillips head screwdriver loosen the two captive screws securing the power supply cooling fan module in the bay see Figure 3 7 Figure 3 7 Replacing the Power Supply CAUTION The power supply cooling fan modules are heavy Use both hands when removing 4 Gr...

Page 36: ... Control Panel The control panel powers the LED indicators on the front panel of the system as well as the Enclosure Mode Selection switch It is connected to the backplane and cannot be removed or replaced unless the system is powered down CAUTION Only trained service technicians are authorized to remove the enclosure cover and access any of the components inside the enclosure Before performing an...

Page 37: ... slots on the edge of the chassis see Figure 3 8 2 Slide the control panel fully into the slot making sure that its connector engages into the matching backplane connector see Figure 3 8 Also make sure the guide tab on the control panel is fully inserted into the mounting slot on the backplane 3 Replace the front faceplate and re attach the 16 screws that hold it in place 4 Re install any drives y...

Page 38: ...losure midplane contains the connectors for the drives EMMs control panel and power supply cooling modules 1 Complete the Removing the Control Panel steps as shown in Removing and Installing the Control Panel 2 Remove the EMMs from the enclosure See Removing and Installing an EMM 3 Remove both power supply cooling modules from the enclosure See Removing and Installing the Power Supply Cooling Fan ...

Page 39: ...nd place it aside 6 Reaching into the enclosure chassis from the back carefully disconnect the midplane from the control panel and lift it out of the enclosure See Figure 3 10 7 To re install the midplane reverse the previous steps Figure 3 10 Removing and Installing the Midplane 1 midplane 1 ...

Page 40: ...40 Installing Enclosure Components ...

Page 41: ...art Up Routine Look and listen during the enclosure s start up routine for the indications described in Table 4 1 For a description of the front and back panel indicators see About Your System NOTE At least two drives must be installed in the enclosure Troubleshooting a Loss of Communication Condition The following activities may cause loss of communication to occur Installing or replacing an EMM ...

Page 42: ...ne Degraded Failed or Foreign NOTE These messages are logged as a result of a loss of communication and do not indicate actual hardware component failures Action 1 Power down the server 2 Verify that all storage subsystem cabling between the PERC5 E Adapter and all attached enclosures including daisy chained enclosures is properly connected and secured 3 Ensure that all the enclosures are powered ...

Page 43: ...tion on the Ctrl R utility see the Dell PERC5 E Adapter User s Guide Troubleshooting External Connections Loose or improperly connected cables and bent pins are the most likely source of problems Ensure that all external cables are securely attached to the external connectors on your system and that none of the connectors are damaged See Back Panel Indicators and Features for the back panel connec...

Page 44: ...e technicians are authorized to remove the enclosure cover and access any of the components inside the enclosure Before performing any procedure see your Product Information Guide for complete information about safety precautions working inside the enclosure and protecting against electrostatic discharge 1 Ensure that the following components are properly installed All drives both in their carrier...

Page 45: ... is turned on If the power switch is turned on continue to step 3 If the power supply s fault indicator is lit continue to step 3 NOTICE Power supply cooling fan modules are hot pluggable The enclosure can operate on a single functioning power supply however both modules must be installed to ensure proper cooling A single power supply cooling fan module can be removed from the enclosure for up to ...

Page 46: ...Help Troubleshooting SAS and SATA Drives CAUTION Only trained service technicians are authorized to remove the enclosure cover and access any of the components inside the enclosure Before performing any procedure see your Product Information Guide for complete information about safety precautions working inside the enclosure and protecting against electrostatic discharge NOTICE This procedure can ...

Page 47: ...ED and the EMM status LED are solid green for each port that is connected to a cable If they are not see Enclosure Management Module EMM 2 Make sure that all cables are attached correctly according to the enclosure mode you selected For more information on enclosure modes see Operating Your Storage Enclosure 3 If you reseated cables reboot the host server If the problem persists refer to Troublesh...

Page 48: ...48 Troubleshooting Your Enclosure ...

Page 49: ...hen prompted by Dell s automated telephone system enter your Express Service Code to route the call directly to the proper support personnel If you do not have an Express Service Code open the Dell Accessories folder double click the Express Service Code icon and follow the directions For instructions on using the technical support service see Technical Support Service and Before You Call NOTE Som...

Page 50: ...about their portable and desktop computer systems When you call AutoTech use your touch tone telephone to select the subjects that correspond to your questions The AutoTech service is available 24 hours a day 7 days a week You can also access this service through the technical support service See the contact information for your region Automated Order Status Service To check on the status of any D...

Page 51: ... Repair or Credit Prepare all items being returned whether for repair or credit as follows 1 Call Dell to obtain a Return Material Authorization Number and write it clearly and prominently on the outside of the box For the telephone number to call see the contact information for your region 2 Include a copy of the invoice and a letter describing the reason for the return 3 Include a copy of any di...

Page 52: ... business customers including Premier Platinum and Gold customers For specific web addresses for your country find the appropriate country section in the table below NOTE Toll free numbers are for use within the country for which they are listed NOTE In certain countries technical support specific to Dell XPS portable computers is available at a separate telephone number listed for participating c...

Page 53: ...try Code 61 City Code 2 E mail Australia au_tech_support dell com E mail Customer Care Australia and New Zealand apcustserv dell com Home and Small Business 1 300 655 533 Government and Business toll free 1 800 633 559 Preferred Accounts Division PAD toll free 1 800 060 889 Customer Care after sales toll free 1 333 55 option 3 Technical Support portables and desktops toll free 1 300 655 533 Techni...

Page 54: ...Country Code 32 City Code 2 Website support euro dell com E mail for French speaking Customers support euro dell com be fr emaildell Technical Support for XPS portable computers only 02 481 92 96 Technical Support for all other Dell computers 02 481 92 88 Technical Support Fax 02 481 92 95 Customer Care 02 713 15 65 Corporate Sales 02 481 91 00 Fax 02 481 92 99 Switchboard 02 481 91 00 Bermuda Gen...

Page 55: ... Small Business toll free 1 800 847 4096 Technical Support med large bus government toll free 1 800 387 5757 Technical Support printers projectors televisions handhelds digital jukebox and wireless 1 877 335 5767 Sales Home Sales Small Business toll free 1 800 387 5752 Sales med large bus government toll free 1 800 387 5755 Spare Parts Sales Extended Service Sales 1 866 440 3355 Cayman Islands Gen...

Page 56: ...d Accounts Division toll free 800 858 2557 Large Corporate Accounts GCP toll free 800 858 2055 Large Corporate Accounts Key Accounts toll free 800 858 2628 Large Corporate Accounts North toll free 800 858 2999 Large Corporate Accounts North Government and Education toll free 800 858 2955 Large Corporate Accounts East toll free 800 858 2020 Large Corporate Accounts East Government and Education tol...

Page 57: ...e 3287 5505 Switchboard Relational 3287 1200 Switchboard Fax Relational 3287 1201 Switchboard Home Small Business 3287 5000 Switchboard Fax Home Small Business 3287 5001 Dominica General Support toll free 1 866 278 6821 Dominican Republic General Support 1 800 148 0530 Ecuador General Support toll free 999 119 El Salvador General Support 01 899 753 0777 Finland Helsinki International Access Code 9...

Page 58: ... 338 339 Switchboard 01 55 94 71 00 Sales 01 55 94 71 00 Fax 01 55 94 71 01 Germany Langen International Access Code 00 Country Code 49 City Code 6103 Website support euro dell com E mail tech_support_central_europe dell com Technical Support for XPS portable computers only 06103 766 7222 Technical Support for all other Dell computers 06103 766 7200 Home Small Business Customer Care 0180 5 224400 ...

Page 59: ... dell com Technical Support Dimension and Inspiron 2969 3188 Technical Support OptiPlex Latitude and Dell Precision 2969 3191 Technical Support PowerApp PowerEdge PowerConnect and PowerVault 2969 3196 Customer Care 3416 0910 Large Corporate Accounts 3416 0907 Global Customer Programs 3416 0908 Medium Business Division 3416 0912 Home and Small Business Division 2969 3105 India E mail india_support_...

Page 60: ...870 907 4499 Ireland Sales 01 204 4444 U K Sales dial within U K only 0870 907 4000 Fax Sales Fax 01 204 0103 Switchboard 01 204 4444 Italy Milan International Access Code 00 Country Code 39 City Code 02 Website support euro dell com E mail support euro dell com it it emaildell Home and Small Business Technical Support 02 577 826 90 Customer Care 02 696 821 14 Fax 02 696 821 13 Switchboard 02 696 ...

Page 61: ...556 3490 24 Hour Automated Order Service 044 556 3801 Customer Care 044 556 4240 Business Sales Division up to 400 employees 044 556 1465 Preferred Accounts Division Sales over 400 employees 044 556 3433 Large Corporate Accounts Sales over 3500 employees 044 556 3430 Public Sales government agencies educational institutions and medical institutions 044 556 1469 Global Segment Japan 044 556 3469 In...

Page 62: ...hnical Support toll free 0800 105 Customer Service Xiamen China 34 160 910 Transaction Sales Xiamen China 29 693 115 Malaysia Penang International Access Code 00 Country Code 60 City Code 4 Website support ap dell com Technical Support Dell Precision OptiPlex and Latitude toll free 1 800 880 193 Technical Support Dimension Inspiron and Electronics and Accessories toll free 1 800 881 306 Technical ...

Page 63: ...site support euro dell com Technical Support for XPS portable computers only 020 674 45 94 Technical Support for all other Dell computers 020 674 45 00 Technical Support Fax 020 674 47 66 Home Small Business Customer Care 020 674 42 00 Relational Customer Care 020 674 4325 Home Small Business Sales 020 674 55 00 Relational Sales 020 674 50 00 Home Small Business Sales Fax 020 674 47 75 Relational ...

Page 64: ... E mail support euro dell com no no emaildell Technical Support for XPS portable computers only 815 35 043 Technical Support for all other Dell products 671 16882 Relational Customer Care 671 17575 Home Small Business Customer Care 23162298 Switchboard 671 16800 Fax Switchboard 671 16865 Panama General Support 001 800 507 0962 Peru General Support 0800 50 669 Poland Warsaw International Access Cod...

Page 65: ... Support Dimension Inspiron and Electronics and Accessories toll free 1800 394 7430 Technical Support OptiPlex Latitude and Dell Precision toll free 1800 394 7488 Technical Support PowerApp PowerEdge PowerConnect and PowerVault toll free 1800 394 7478 Customer Care toll free 1 800 394 7430 option 6 Transaction Sales toll free 1 800 394 7412 Corporate Sales toll free 1 800 394 7419 Slovakia Prague ...

Page 66: ... Sales Penang Malaysia 604 633 4810 Spain Madrid International Access Code 00 Country Code 34 City Code 91 Website support euro dell com E mail support euro dell com es es emaildell Home and Small Business Technical Support 902 100 130 Customer Care 902 118 540 Sales 902 118 541 Switchboard 902 118 541 Fax 902 118 539 Corporate Technical Support 902 100 130 Customer Care 902 115 236 Switchboard 91...

Page 67: ...ell Technical Support for XPS portable computers only 0848 33 88 57 Technical Support Home and Small Business for all other Dell products 0844 811 411 Technical Support Corporate 0844 822 844 Customer Care Home and Small Business 0848 802 202 Customer Care Corporate 0848 821 721 Fax 022 799 01 90 Switchboard 022 799 01 01 Taiwan International Access Code 002 Country Code 886 Website support ap del...

Page 68: ...l com Technical Support Corporate Preferred Accounts PAD 1000 employees 0870 908 0500 Technical Support for XPS portable computers only 0870 366 4180 Technical Support direct and general for all other products 0870 908 0800 Global Accounts Customer Care 01344 373 186 Home and Small Business Customer Care 0870 906 0010 Corporate Customer Care 01344 373 185 Preferred Accounts 500 5000 employees Cust...

Page 69: ...rt toll free 1 800 456 3355 Employee Purchase Program EPP Customers toll free 1 800 695 8133 Printers and Projectors Technical Support toll free 1 877 459 7298 Public government education and healthcare Customer Service and Technical Support toll free 1 800 456 3355 Employee Purchase Program EPP Customers toll free 1 800 695 8133 Dell Sales toll free 1 800 289 3355 or toll free 1 800 879 3355 Dell...

Page 70: ...70 Getting Help ...

Page 71: ...t system Your system s BIOS contains programs stored on a flash memory chip The BIOS controls the following Communications between the processor and peripheral devices Miscellaneous functions such as system messages bit The smallest unit of information interpreted by your system blade A module that contains a processor memory and a drive The modules are mounted into a chassis that includes power s...

Page 72: ...guration Protocol A method of automatically assigning an IP address to a client system diagnostics A comprehensive set of tests for your system DIMM Dual in line memory module See also memory module DIN Deutsche Industrie Norm directory Directories help keep related files organized on a disk in a hierarchical inverted tree structure Each disk has a root directory Additional directories that branch...

Page 73: ...A base 16 numbering system often used in programming to identify addresses in the system s RAM and I O memory addresses for devices In text hexadecimal numbers are often followed by h headless system A system or device that functions without having a keyboard mouse or monitor attached Normally headless systems are managed over a network using an Internet browser host adapter A host adapter impleme...

Page 74: ...he video adapter circuitry can be designed to run much faster than they would with a traditional expansion bus See also bus LVD Low voltage differential m Meter s mA Milliampere s MAC address Media Access Control address Your system s unique hardware number on a network mAh Milliampere hour s Mb Megabit s 1 048 576 bits MB Megabyte s 1 048 576 bytes However when referring to drive capacity the ter...

Page 75: ...stem that controls the interpretation and execution of arithmetic and logic functions Software written for one processor must usually be revised to run on another processor CPU is a synonym for processor protected mode An operating mode that allows operating systems to implement A memory address space of 16 MB to 4 GB Multitasking Virtual memory a method for increasing addressable memory by using ...

Page 76: ...ace used by a stripe is the same on each disk used A virtual disk may use several stripes on the same set of disks in an array See also guarding mirroring and RAID SVGA Super video graphics array VGA and SVGA are video standards for video adapters with greater resolution and color display capabilities than previous standards system board As the main circuit board the system board usually contains ...

Page 77: ... include memory chips in addition to your system s RAM The amount of video memory installed primarily influences the number of colors that a program can display with the appropriate video drivers and monitor capabilities video resolution Video resolution 800 x 600 for example is expressed as the number of pixels across by the number of pixels up and down To display a program at a specific graphics...

Page 78: ...78 Glossary ...

Page 79: ...F firmware downloading 23 front bezel removing and replacing 25 front panel indicators LED indicators 9 H hard drives installing and removing 28 removing and replacing 27 M Managing 22 midplane cage 38 installing and replacing 38 P power supplies troubleshooting 44 power supply features 17 R rack mounted systems installing 19 S safety 41 support contacting Dell 52 system cooling troubleshooting 45...

Page 80: ...80 Index 80 Index troubleshooting continued power supplies 44 start up routine 41 system cooling 45 wet system 43 W warranty 7 ...

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