Instruction/ maintenance manual of the product MD3000 Dell
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www .dell.com | support.dell.com Dell™ PowerV ault™ MD3000 RAID Enclosure Hardware Owner’ s Manual.
Notes, Notices, and Cautions NOTE: A NOTE indicates important i nformation that helps you make better use of your computer . NOTICE: A NOTICE indicates either potential da mage to hardware or loss of da ta and tells you how to avoid the problem. CAUTION: A CAUTION indicates a potential for propert y damage, personal injury , or death.
Contents 3 Contents 1 About Y our Sy stem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Enclosure Features . . . . . . . . . . . . . . . . . . . . . .
4 Contents Supported RAID Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 RAID 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 RAID 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents 5 Updating Enclosure Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . 54 RAID Controller Module Firmware . . . . . . . . . . . . . . . . . . . . . 54 Phy sical Disk Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Expansion Enclosure Firmware .
6 Contents T roubleshooting Enclosure Cooling Problems . . . . . . . . . . . . . . . . . 72 T roubleshooting a Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 T roubleshooting SAS Phy sical Disks . . . . . . . . . . . . . . . . . . . . . .
About Y our Sy stem 7 About Y our Sy stem The Dell™ P owerV ault™ MD3000 is a 3U rack-mount ed external Redundant Array of Independent Disks (R AID ) enclosure capable of accommodating up to 15 3.
8 About Y our Sy stem • Up to 2 TB (2036 GB) storage on a single virtual disk • Support for up to two P owerV ault MD1000 expansio n enclosur es through SAS Out port connectors on the R AID controller modules NOTE: These numbers represent maximum theoretical perf ormance based on sy stem architecture.
About Y our Sy stem 9 • The Getting Started Guide provides an overview of enclosure features, setting up your enclosure , and technical specifications. • Setting Up Y our P owerV ault MD3000 provides an overview of setting up and cabling your storage array .
10 About Y our Sy stem Figure 1-1. LEDs on the Front Bezel Front-Panel Indicators and Features F igure 1-2 shows the LED indicators and components on the enclosure ’s front panel (optional locking bezel not shown). T able 1-2 lists the conditi ons and functions indicated by each.
About Y our Sy stem 11 Figure 1-2. Front-Panel Features 1 enclosure status LED 2 powe r LED 3 split mode LED (unused) 4 enclosure mode switch (unused) 5 phy sical disks (15) T able 1-2. Front-Panel Components Component Icon Condition Enclosure status LED (blue/amber) Steady amber: P ower is on and enclosure is in reset state.
12 About Y our Sy stem NOTICE: This sy stem does not support user -customizable operating modes. Therefore, the split mode LED and enclosure mode switch are no t functional. However , if additional expans ion enclosures are daisy chained to your sy stem, the enclosure mode switch on the RAID array enclosure must be in single-mode position.
About Y our Sy stem 13 Back-Panel Indicators and Features F igure 1-4 shows the back-panel featur es of the enc losure. T wo R AID controller modules and two power supply/cooling fan modules must be installed for t he enclosure to operate properly . However , the enclosure can run temporarily on one power supply/cooling fan module .
14 About Y our Sy stem RAID Controller Modules The R AID controller modules provide high-performance, advanced virtual disk configuration, and fault- tolerant disk subsystem management.
About Y our Sy stem 15 • One SAS Out port connector • Debug port (Dell support only) F or a description of each component on the front panel of the RAID controller module, see T able 1-4. F or an explanation of how to connect the enclosur e using the R AID controller module ports, see "Cabling Y our R AID Enclosure" on page 21.
16 About Y our Sy stem The R AID controller module connects to the enclosure midplane vi a the two midplane connectors on its internal (rear) panel. The R AID cont roller module is shown in F igure 1-6. Figure 1-6. RAID Controller Module 8 Ethernet Link LED (green) Green: Ethernet connection is active.
About Y our Sy stem 17 Battery Backup Unit Each R A ID controller contains a three-cell lithium -ion battery backup unit (BBU) that powers the controller ’s cache memory and preserves the cache con tents in the event of a power outage of up to 72 hours.
18 About Y our Sy stem Write-Through Cache W rite-through cache is a caching stra tegy whereby data is written to t he physical disk before completion status is returned to the host operating system. W rit e-through cache is considered mor e secure than write-back cache, since a power failure is less li k ely to cause loss of da ta.
About Y our Sy stem 19 T able 1-5. Power Supply/Co oling Fan Module LED Indicators T ype Color Icon Function DC power Green On: DC output voltages are within specifications.
20 About Y our Sy stem.
Cabling Y our R AID Enclosure 21 Cabling Y our RAID Enclosure This section provides the following information: • P rocedures for connecting your RAID enclosur e to a host system • A description of.
22 Cabling Y our RAID Enclosure Each MD3000 R A ID controller module also contains a SAS Out port connec tor . This port allows you the option to connect the R AID enclo sure to an e xpansion enclosure. Cabling the Enclosure Y ou can cable your enclosure to up to four hosts and up to two e xpansion enclosures.
Cabling Y our R AID Enclosure 23 Figure 2-1. Cabling One Host with Nonredundant Data Paths Figure 2-2. Cabling T wo Hosts with Nonredundant Data Paths single-HBA host server RAID controlle r module 0 .
24 Cabling Y our RAID Enclosure Figure 2-3. Cabling a T wo-Node C luster (Single HBA, Nonredundant Data Paths from Each Node) F igure 2-4 and Figur e 2-5 show redund ant, high-availability cabling conf igurations for one and two hosts. If any one path fails, at least one HBA is still connected to one R AID controller .
Cabling Y our R AID Enclosure 25 Figure 2-5. Cabling a Single Host (Sing le-HBA) Using Redund ant Data Paths Dual SAS In-Port Configurations F igure 2-6 through F igure 2-12 show supported nonr edundant and redundant cabling configurations to MD3000 R AID controller modules wi th two SAS In port connectors.
26 Cabling Y our RAID Enclosure Figure 2-6. Cabling Up to Four Hosts with Nonredundant Data Paths F igure 2-7 through F igure 2-10 show redundant, high-availability cabl ing configurations for one and two hosts. If any one path fails, at least one HB A is still connected to one R AID controller .
Cabling Y our R AID Enclosure 27 Figure 2-7. Cabling a Single Host (Dual HBA with Four Cable Co nnections) Using Redundant Data Paths Figure 2-8. Cabling a Single Host (S ingle HBA) Using Re dundant D.
28 Cabling Y our RAID Enclosure Figure 2-9. Cabling T wo Hosts (with Dual HBAs) Using Re dundant Data Paths Figure 2-10. Cabling T wo Hosts (with Si ngle HBAs) Using Redundant Data Paths dual-HBA host.
Cabling Y our R AID Enclosure 29 F igure 2-11 through F igure 2-12 show r edundant, two- node cluster configurations using a single RAID enclosure that is subsequently e xpa nded to two more storage enclosur es. Figure 2-11. Cabling a T wo-Node Cluster (Single HBA, Redundant Data Paths from Each Node) Figure 2-12.
30 Cabling Y our RAID Enclosure F or a more detailed discussion of r edundancy and no nredundancy , as well as alternate path software, see "Hardwar e Redundancy and F ailover" on page 49.
Cabling Y our R AID Enclosure 31 d Using the MD Storage Manager , update the MD 3000 RAID controller firmware to the latest version available on support.dell.com ( Support → Download F irmware → Download R AID Controller Module F irmware ) and the NVSR AM ( Support → Download F irmware → Download R AID Controller Module NVSRAM ).
32 Cabling Y our RAID Enclosure d Using the MD Storage Manager , update the MD3000 RAID controller firmware ( Support → Download F irmware → Download R AID Controller Module F irmware ) and the NVSR AM ( Support → Download F irmware → Download R AID Controller Module NVSRAM ).
Using Y our RAID Enclosure 33 Using Y our RAID Enclosure This section covers the following information: • Basic concepts of a R AID solution including physical disks, virt ual disks, and disk groups.
34 Using Y our RAID Enclosure Phy sical Disk States The R AID controller module recognizes the physical disk states ( mode and status reported in MD Storage Manager) described in T able 3-1.
Using Y our RAID Enclosure 35 Virtual Disks and Disk Groups When configuring a storage array , you wo uld normally proceed in this order : • Or ganize the physical disks into disk groups.
36 Using Y our RAID Enclosure Using multiple physical disks has several advant ages over using a single physical disk, including: • Placing data on multiple physical disks, called striping , means that input/output (I/O) operations can occur simultaneously and improve performance.
Using Y our RAID Enclosure 37 RAID Level Usage T o ensure best performance, you should select an op timal RAID level when you cr eate a system physical disk.
38 Using Y our RAID Enclosure Global Hot Spares The MD3000 supports global hot spar es. A global hot spar e can repla ce a failed physical disk in any virtual disk with a redundant R AID le vel as lon.
Using Y our RAID Enclosure 39 RAID Operations and Features This section details the following R AID operations and features supported by your enclosur e or RAID controller: • Virtual disk operations.
40 Using Y our RAID Enclosure Media Verification Another background task performed on the R AID co ntroller module is medi a verification of all configured physical disks in a disk group.
Using Y our RAID Enclosure 41 Segment Size Migration Segment size refers to the amount of data (in kil obytes) that the R AID cont roller module writes on a single physical disk in a virtual disk befor e writing data on the next physical disk. V alid values for the segment size are 8, 16, 32, 64, 128, 256, and 512 KB.
42 Using Y our RAID Enclosure Disk Group Operations Limit The maximum number of active, concurrent disk group processes per controller is one. This limit is applied to the following disk group process.
Using Y our RAID Enclosure 43 When you migrate a physical disk or a disk grou p from one MD3000 array to another , the MD3000 you migrate to will recognize any data structur es an d/or metadata you had in place on the migrating MD3000.
44 Using Y our RAID Enclosure • Enabling pr emium features befor e migration — Befor e migrating disk groups and virtual disks, enable the requir ed premium featur es on the destination stor age array .
Using Y our RAID Enclosure 45 • Y ou plan to have all attached hosts shar e access to all virtual disks on th e storage array . When you choose this type of configuration, all of the hosts must have the same operating system and must have special software (such as clustering softwar e ) to manage virtual disk sharing and accessibility .
46 Using Y our RAID Enclosure Snapshot Virtual Disks A snapshot is a point-in-time image of a virtual disk. The snapshot provides an image of the virtual disk at the time the snapshot was created.
Using Y our RAID Enclosure 47 V olume Shadow-Copy Service The Microsoft V olume Shadow-copy Service (VSS) is a storage management interface for Microsoft W indows Server ® 2003. VSS enables your storage array to interact with third- party applications that use the VSS Application P rogramming Interface.
48 Using Y our RAID Enclosure T arget V irtual Disk — When you start a virtual disk copy , the targ et virtual disk maintains a copy of the data from the source virtual disk. Y ou can choose whet her to use an existing virt ual disk or cr eate a new virtual disk as the target virtual disk.
Using Y our RAID Enclosure 49 Hardware Redundancy and Failover This section provides basic information that will help you determine how to c onnect a host to the RAID controller modules in a R AID enclosure in or der to achieve r edundancy and failover .
50 Using Y our RAID Enclosure P aths used by the preferr ed controller to acce ss either the disks or the host are called the pr eferred paths ; redundant paths ar e called the alternate paths . If a failure causes the preferr ed path to become inaccessible, the storage array automatically uses the alternate path to access data.
Using Y our RAID Enclosure 51 This cabling topology , when used with alternate path software, ensur es a redundant path from the host server to the virtual disks.
52 Using Y our RAID Enclosure Figure 3-3. T wo Hosts, each with T w o Cable Connections This cabling topology , when used with alternate path software, ensur es a redundan t path from the host to the virtual disks.
Using Y our RAID Enclosure 53 RAID Controller Failover Modes F ailover provides redundant access to the virtual di sks owned by eithe r R AID controller module on the storage array . F ailover happens automatically (and transparently). As a r esult, the host(s) never loses access through the preferr ed contro ller which owns the virtual disk.
54 Using Y our RAID Enclosure Updating Enclosure Firmware Y ou can use MD Storage Manager to upgrade the firmware for the R A ID controller module, the controller NVSR AM, and the physical disks. In a re dundant configuration, the R AID controller module firmware can be upgraded with no interruption to data access.
Installing Enclosure Components 55 Installing Enclosure Components This section explains how to in stall the following components: • F ront bezel (optional) • Physical disk s and disk carriers •.
56 Installing Enclosure Components Figure 4-1. Installing and Re moving the Front Bezel 4 T o replace the bezel, insert the interlocking notc h into the U-shaped handle on the side of the front enclosure panel. 5 Snap the left side of the bezel into place in the U-shaped handle on the left side of the enclosure .
Installing Enclosure Components 57 CAUTION: Alway s wear a wrist grounding strap when h andling equipment with static-sensitive components. 1 W ait until the LED indicators on the physical disk carrier stop flashing. 2 Squeeze the release mechanism on the front of the physical disk carrier (see F igure 4-2).
58 Installing Enclosure Components CAUTION: Alway s wear a wrist grounding strap when h andling equipment with static-sensitive components. 1 P erform the following steps to install the new physical d.
Installing Enclosure Components 59 2 Wi t h t h e physical disk carrier handle open, carefully align the ch annel on the disk carrier guide rail with the appropriate disk slot ke ying featur e on the chassis face plate, and insert the disk (see Fi g u r e 4 - 2 ) .
60 Installing Enclosure Components Figure 4-4. Removing and Ins talling a RAID Controller Module Installing a RAID Controller Module 1 Carefully insert the R AID controlle r module into the empty module slot. 2 P u sh the module to the back of the slot until it is firmly seated in the backplane connector (see Fi g u r e 4 - 4 ) .
Installing Enclosure Components 61 CAUTION: Only trained service technicians ar e authorized to remove the enclos ure cover and access any of the components inside the enclosure.
62 Installing Enclosure Components 5 Disconnect the battery unit from th e connector by sliding it towards th e back of the controller , then remove it from the controller module. 6 Place the replacement battery unit into the contro ller module tray and push the battery unit into the connector on the R AID controller circuit board.
Installing Enclosure Components 63 Figure 4-6. Replacing the Power Supply CAUTION: The power supply/cooling fan modules are heavy . Use both hands when removing. 3 Grasp the handle on the power supply and carefully pull the module out of the bay (see F igure 4-6).
64 Installing Enclosure Components Removing and Installing the Control Panel The control panel powers the LED ind icators on the front panel of the system enclosure. It is connected to the backplane and cannot be r emoved or replaced unless the system is powered down.
Installing Enclosure Components 65 Figure 4-7. Removing and Re placing the Control Panel 6 Using a T orx T10 driver , remove all 16 scr ews from the front faceplate of the enclosure as shown in Fi g u r e 4 - 7 . 7 Remove the front faceplate from the enclos ure and place it on a flat, secur e surface.
66 Installing Enclosure Components 6 Reconnect power cables to the enclosure and power it back on. 7 P ower on the host server . Removing and Installing the Midplane CAUTION: Only trained service technicians ar e authorized to remove the enclos ure cover and access any of the components inside the enclosure.
Installing Enclosure Components 67 Figure 4-8. Removing and Replacing the Controller/Power Supply Cage 5 Slide the controller/power supply cage out of the enclosure and 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 F igure 4-9).
68 Installing Enclosure Components Figure 4-9. Removing and Installing the Midplane 1 midplane 1.
T roubleshooting Y our Enclosure 69 T roubleshooting Y our Enclosure Safety First—For Y ou and Y our Enclosure T o perform certain procedures in this document, you must work inside t he enclosure. While working inside the enclosure, do not attempt to perform service e xcept as explained in this guide and elsewhere in your documentation.
70 T roubleshooting Y our Enclosure T roubleshooting a Wet Enclosure Problem • Liquid spilled on the enclosure . • Ex cessive humidity . Action CAUTION: Only trained service technicians ar e authorized to remove the enclos ure cover and access any of the components inside the enclosure.
T roubleshooting Y our Enclosure 71 • R AID controller modules • Enclosure midplane 2 Ensure that all cables ar e properly connected a nd that there are no bent pins in the connector . If problems are encounter ed, see "Getting Help" on page 77.
72 T roubleshooting Y our Enclosure T roubleshooting Enclosure Cooling Problems Problem • Systems management software issues a fan-r elated error message. Action Ensure that none of the following conditions e xist: • Ambient temperature is too high.
T roubleshooting Y our Enclosure 73 NOTICE: This procedure can destroy data stored on the phy sical disks. Before you continue, back up all files on the disk. Problem • A single physical disk is not seen in MD Storage Manager . Action 1 Remove the physical disk from the enclosure.
74 T roubleshooting Y our Enclosure T roubleshooting Enclosure Connections Problem • Enclosur e is not seen by attached host controller . Action • Inspect R AID controller module cables for connectiv ity problems, such as damaged or disconnected cables and poor connections.
T roubleshooting Y our Enclosure 75 Critical Conditions The storage array will generate a criti cal event if the RAID co ntroller module detect s a critical condition that could cause immediate failure of the enclosur e and/or loss of data.
76 T roubleshooting Y our Enclosure.
Getting Help 77 Getting Help Obtaining Assistance CAUTION: If you need to remove the sy stem cover , first disconnect the po wer and modem cables from all electrical outlets. 1 Complete the procedures in "T roubleshooting Y our Enclosure" on page 69.
78 Getting Help www .euro .dell.com (Europe only) www .dell.com/la (Latin American countries) www .dell.ca (Canada only) Y ou can access Dell Support through the following websites and e-mail addr esses: • Dell Support websites support.dell.com support.
Getting Help 79 Support Service Dell's support service is available 24 hours a day , 7 days a week, to answer yo ur questions about Dell hardwar e.
80 Getting Help Returns that are missing any of the pr eceding requir ements will be r efused at our receiving dock and returned to you. Before Y ou Call NOTE: Have your Express Service Code ready when you call . The code helps Dell's au tomated-suppor t telephone sy stem direct your call more efficiently.
Getting Help 81 Antigua and Barbuda W ebsite: www .dell.com.ag E-mail: la-techsupport@dell.com General Support 1-800-805-5924 Aom e n T e chnical Support (Del l™ Dimension™, Dell Inspiron™, Dell.
82 Getting Help Austria (V ienna) International Access Code: 900 Country Code: 43 City Code: 1 We b s i t e : support.euro.dell.com E-mail: tech_support_central_europe@dell.
Getting Help 83 Brazil International Access Code: 00 Country Code: 55 City Code: 51 W ebsite: www .dell.com/br E-mail: BR- T echSupport@dell.com Customer Care and T ech Support 0800 90 3355 T echnical.
84 Getting Help Chile (Santiago) Country Code: 56 City Code: 2 We b s i t e : www .dell.com/cl E-mail: la-techsupport@dell.com Sales and Customer Support toll-free: 1230-020-4823 China (Xiamen) Country Code: 86 City Code: 592 T echnical Support website: support.
Getting Help 85 Colombia W ebsite: www .dell.com/cl E-mail: la-techsupport@dell.com General Support 01-800-915-4755 Costa Rica W ebsite: www .dell.com/cr E-mail: la-techsupport@dell.com General Support 0800-012-0231 Czech Republic (P rague) International Access Code: 00 Country Code: 420 W ebsite: support.
86 Getting Help Ecuador We b s i t e : www .dell.com/ec E-mail: la-techsupport@dell.com General Support (calling from Quito) toll-free: 999-119-877-655-3355 General Support (calling from Guayaquil) toll-free: 1800-999-119-877-655- 3355 El Salvador We b s i t e : www .
Getting Help 87 F rance (P aris) (Montpellier) International Access Code: 00 Country Code: 33 City Codes: (1) (4) W ebsite: support.euro .dell.com Home and Small Business T echnical Support for XPS 08.
88 Getting Help Greece International Access Code: 00 Country Code: 30 We b s i t e : support.euro.dell.com T echnical Support 00800-44 14 95 18 Gold Service T echnical Support 00800-44 14 00 83 Switchboard 2108129810 Gold Service Switchboard 2108129811 Sales 2108129800 Fa x 2108129812 Grenada E-mail: la-techsupport@dell.
Getting Help 89 India W ebsite: support.ap.dell.com E-mail: india_support_desktop@dell.com india_support_notebook@dell.com india_support_Server@dell.com T echnical Support (XPS computers) 0802 506 803.
90 Getting Help Italy (Milan) International Access Code: 00 Country Code: 39 City Code: 02 We b s i t e : support.euro.dell.com Home and Small Business T echnical Support 02 577 826 90 Customer Care 0.
Getting Help 91 Japan (Kawasaki) International Access Code: 001 Country Code: 81 City Code: 44 W ebsite: support.jp.dell.com T echnical Support (XPS) toll-free: 0120-937-786 T echnical Support outside.
92 Getting Help Korea (Seoul) International Access Code: 001 Country Code: 82 City Code: 2 E-mail: krsupport@dell.com Support toll-free: 080-200-3800 T echnical Support (XPS) toll-free: 080-999-0283 S.
Getting Help 93 Malaysia (P enang) International Access Code: 00 Country Code: 60 City Code: 4 W ebsite: support.ap.dell.com T echnical Support (XPS) toll-free: 1800 885 784 T echnical Support (Dell P.
94 Getting Help Netherlands (Amsterdam) International Access Code: 00 Country Code: 31 City Code: 20 We b s i t e : support.euro.dell.com T echnical Support for XPS 020 674 45 94 T echnical Support fo.
Getting Help 95 P oland (W arsaw) International Access Code: 011 Country Code: 48 City Code: 22 W ebsite: support.euro .dell.com E-mail: pl_support_tech@dell.
96 Getting Help Singapore (Singapore) International Access Code: 005 Country Code: 65 NOTE: The phone numbers in this section should be called from within Singapore or Malay sia only.
Getting Help 97 Spain (Madrid) International Access Code: 00 Country Code: 34 City Code: 91 W ebsite: support.euro .dell.com Home and Small Business T echnical Support 902 100 130 Customer Care 902 11.
98 Getting Help Ta i w a n International Access Code: 002 Country Code: 886 We b s i t e : support.ap.dell.com E-mail: support.dell.com.cn/email T echnical Support (XPS) toll-free: 0080 186 3085 T ech.
Getting Help 99 U.K. (Bracknell) International Access Code: 00 Country Code: 44 City Code: 1344 W ebsite: support.euro .dell.com E-mail: dell_direct_support@dell.
100 Getting Help U.S.A. (Austin, T exas) International Access Code: 011 Country Code: 1 Automated Or der-Status Service toll-free: 1-800-433-9014 AutoT ech (portable and desktop computers) toll-free: .
Getting Help 101 U.S. V irgin Islands E-mail: la-techsupport@dell.com General Support toll-free: 1-877-702-4360 V enezuela W ebsite: www .dell.com/ve E-mail: la-techsupport@dell.
102 Getting Help.
Glossary 103 Glossary This section defines or identifies technical terms, abbreviations, and acronyms used in your system documents. A — Ampere(s). AC — Alternating current. ACP I — Advanced Configuration and P ower Interface. A standard interface for enabling the operating system to direct configuration and power management.
104 Glossary cm — Centimeter(s). cmos — Complementary metal-oxide semiconductor . component — As they relate to DMI, components include operating systems, computer systems, e xpansion cards, and peripherals that ar e compatible with DMI. Each component is made up of groups and attributes that are defined as r elevant to that component.
Glossary 105 expansion card — An add-in card, such as a NIC or SCSI adapter , that plugs into an expansion-car d connector on the system board. An e xpansion card adds some specialized function to the system by providing an interface between the expansion bus and a peripheral.
106 Glossary jumper — Small blocks on a circuit board with two or more pins emer ging from them. Plastic plugs containing a wire fit down over the pins. The wir e connects the pins and creates a circuit, providing a simple and r eversible method of changing the circuitry in a board.
Glossary 107 NMI — Nonmaskable interrupt. A device sends an NMI to signal the processor about hardwar e errors. ns — Nanosecond(s). NTFS — The NT F ile System option in the W indows 2000 operating system. NVRAM — Nonvolatile random-access memory .
108 Glossary ROM — Read-only memory . Y our system contains some programs essential to its op eration in ROM code. A ROM chip retains its contents even after you turn off your system. Examples of code in ROM include the program that initiates your system’s boot routine and the POST .
Glossary 109 UNIX — Universal Internet Exchange. UNIX, the precursor to Linux, is an operating system written in the C programming language. uplink port — A port on a network hub or switch used to connect to other hubs or sw itches without r equiring a crossover cable.
110 Glossary.
Index 111 Index C cabling enclosure, 2 2 - 3 0 h o s t , 50-51 consistency check, 39 contacting Dell, 80 control panel installing/removing, 6 4 cooling fan features, 1 8 troubleshooting, 7 2 D damaged.
112 Index 112 Index storage management softwar e See MD Storage Manager storage management station, 8 support contacting Dell, 8 0 system cooling troubleshooting, 7 2 T telephone numbers, 80 thermal t.
An important point after buying a device Dell MD3000 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Dell MD3000 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Dell MD3000 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Dell MD3000 you will learn all the available features of the product, as well as information on its operation. The information that you get Dell MD3000 will certainly help you make a decision on the purchase.
If you already are a holder of Dell MD3000, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Dell MD3000.
However, one of the most important roles played by the user manual is to help in solving problems with Dell MD3000. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Dell MD3000 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
