Dell™ PowerVault™ MD1120 Storage Enclosure Hardware Owner’s Manual w w w. d e l l . c o m | s u p p o r t . d e l l .
Notes, Notices, and Cautions NOTE: A NOTE indicates important information that helps you make better use of your computer. NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death. ____________________ Information in this document is subject to change without notice. © 2008 Dell Inc. All rights reserved.
Contents 1 About Your System . . . . . . . . . . . . . . . . . . . 7 . . . . . . . . . . . . . 7 . . . . . . . . . . . . 8 . . . . . . . . . . . 9 Other Information You May Need Indicators on the Enclosure Bezel Front-Panel Indicators and Features Physical Disk Carrier LED Indicators . Back-Panel Indicators and Features . . . . . . . 11 . . . . . . . . . . 13 Enclosure Management Module (EMM) . . . . . . 14 Enclosure Failover When Two EMMs Are Installed 18 EMM Thermal Shutdown . . .
3 Installing Enclosure Components Recommended Tools . . . . . . . . . . . . . . . . . . . 27 Removing and Replacing the Front Bezel . . . . . . . . 27 Removing and Installing Physical Disks . . . . . . . . 28 . . . 29 . . . . . 30 . . . . . . . . . . . . 32 Removing an EMM . . . . . . . . . . . . . . . . . 33 Installing an EMM. . . . . . . . . . . . . . . . . . 34 . . .
Troubleshooting a Wet Enclosure . . . . . . . . . . . . Troubleshooting a Damaged Enclosure . . . . . . . . . 46 . . . . . . . . . . . . 47 . . . . . 48 . . . . . . . . . . . . . . . 48 Troubleshooting Power Supplies Troubleshooting Enclosure Cooling Problems Troubleshooting a Fan Troubleshooting Physical Disks . . . . . . . . . . . . . 49 . . . . . . . . 51 . . . . . . . . . . . . . . . . . . . . . . 53 . . . . . . . . . . . . . . . . . . . . . 53 . . . . . . . . . . . . . . . . . . .
Contents
About Your System The enclosure provides a 2-U rack-mounted external storage chassis capable of accommodating up to 24 2.5-inch, 3.0-Gbps Serial-Attached SCSI (SAS) physical disks. The enclosure can be daisy-chained with up to two additional enclosures to provide up to 72 physical disks per host connection. Host-based RAID configuration is supported via a Dell™ PowerEdge™ Expandable RAID Controller (PERC) 6/E adapter.
• Release notes or readme files may be included to provide last-minute updates to the system or documentation or advanced technical reference material intended for experienced users or technicians. Indicators on the Enclosure Bezel An optional locking bezel can be installed on the front of the enclosure to limit access. Figure 1-1 illustrates the indicators and components on the bezel. Table 1-1 lists conditions indicated by the lights on the 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" on page 16. 2 Power (green) When lit, at least one power supply is supplying power to the enclosure.
Figure 1-2. Front-Panel Features 4 3 5 6 2 1 7 1 split-mode LED 2 power LED 3 enclosure status LED 4 physical disk activity LED 5 physical disk status LED 6 physical disks (24) 7 enclosure mode switch Table 1-2. Front-Panel Components Component Icon Enclosure status LED (blue/amber) Condition 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.
Table 1-2. Front-Panel Components (continued) Component Icon Condition Split mode LED (green) When lit, indicates the enclosure is in splitmode configuration; otherwise, the enclosure is in unified mode. For more information, see "Unified Mode and Split Mode" on page 16. 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.
Figure 1-3. Physical Disk Carrier LED Indicators 2 1 1 activity LED Table 1-3.
Table 1-3.
Enclosure Management Module (EMM) Each EMM provides data path and enclosure management functions for your enclosure, including: • Monitoring and controlling enclosure environment elements (temperature, fans, power supplies, and enclosure LEDs) • Controlling access to the physical disks • Communicating enclosure attributes and states to the host server NOTE: At least one EMM must be installed in the enclosure.
Table 1-4. EMM Component Functions Item Component 1 Debug Port 2 SAS Port (In) 3 In Port Link Status LED (green/amber) Icon Function Dell factory/technical support use only. In Provide SAS connection for cabling to host or next upchain expansion enclosure (unified mode only). Green: All links into the port are connected. Amber: One or more links into the port are not connected. Off: Interface is not active.
Table 1-4. EMM Component Functions (continued) Item Component 6 Icon EMM Status LED (green/amber) Function 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.
controlled by the secondary (right) EMM. You must select either mode using the enclosure mode switch on the front panel of the enclosure before powering on (see Figure 1-2). NOTE: Clustering is not supported in the MD1120 host-based RAID solution. Figure 1-6 illustrates the division of control, depending on whether you select the enclosure to run in either unified or split mode. Figure 1-6. Physical Disk Slot Distribution in Split Mode vs.
Enclosure Failover When Two EMMs Are Installed If two EMMs are installed, a certain degree of failover is offered. Control and monitoring of the enclosure elements 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.
Figure 1-7. Power Supply and Cooling Fan Module Features and LED Indicators 1 2 3 4 5 6 7 8 1 AC power connector 2 power cord retention clip 3 cooling fans (4) 4 AC power LED 5 power supply/cooling fan fault LED 6 DC power LED 7 on/off switch 8 release tab Table 1-5. Power Supply/Cooling Fan Module LED Indicators LED type LED color DC power Green LED Icon Function On: DC output voltages are within specifications. Off: No power, or voltages not within specifications.
Enclosure Alarms An audible alarm is activated if any of the fault conditions listed in Table 1-6 occur. If a critical event occurs, the alarm sounds continuously. If a noncritical event occurs, the alarm sounds every 10 seconds. NOTE: The audible alarm is disabled by default. To enable the alarm, you must change the default setting in server administrator. For more information, see server administrator storage management service documentation. Table 1-6.
Operating Your Storage Enclosure This section provides procedures for connecting your storage enclosure to a host system for either unified or split mode.
• A split-mode configuration is one in which your storage enclosure is connected to either two host controllers, or two ports on a single host controller. In this configuration, the physical disks are split into two groups with 12 physical disks controlled by one host controller and 12 physical disks controlled by the other host controller. See Figure 2-2 and Figure 2-3 for a cabling diagram of a split mode configuration. NOTE: Daisy-chaining storage enclosures is not supported in split mode.
port on the primary EMM will control physical disks in slots 12 through 23; the server or controller port attached to the In port on the secondary EMM will control physical disks in slots 0 through 11. NOTE: In split mode, you can cable the enclosure to operate in either a twohost or single-host configuration. In single-host configuration, you can cable both EMMs to either the same host controller, or to a separate host controller. Figure 2-1. Single Host Server, Unified Mode (No Expansion) Figure 2-2.
Figure 2-4. Single Host Server, Unified Mode (MD1120 and MD1000 Maximum Expansion) NOTE: MD1120 and MD1000 enclosures cannot be attached in the same expansion chain, or connected to the same host server controller. 4 Using the enclosure mode switch, select either unified or split mode (see Figure 1-2 for switch positions). 5 Connect power to the power supplies.
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" on page 43. Changing Your Enclosure’s Operating Mode If you decide to change the operating mode of your enclosure after initial configuration (for example, from split mode to unified mode or vice versa), it is important to follow some basic steps to guard against preventable problems.
Managing Your Storage Enclosure Disk storage within the enclosure can be configured using either the PERC 6/E Ctrl-R BIOS firmware or Dell OpenManage™ Storage Management Service, a plug-in to Dell OpenManage Server Administrator. NOTE: Online configuration, enclosure status, and active event notification is supported with Server Administrator version 5.4 or later only.
Installing Enclosure Components This section explains how to install the following components: • Front bezel (optional) • Physical disks and physical disk carriers • EMMs • Power supplies • Control panel • Enclosure midplane Recommended Tools The procedures in this section require the use of one or more of the following tools: • #2 Phillips-head screwdriver • #1 Phillips-head screwdriver • Wrist grounding strap, as explained in the safety instructions that came with your system Removing an
3 Push inward on the release tab on the bezel and lift it away from the enclosure front (see Figure 3-1). Figure 3-1. Installing and Removing the Front Bezel 2 1 3 1 bezel lock 2 interlocking notch (2) 3 latch retainer (2) 4 To replace the bezel, insert the interlocking notch into the latch retainer on the right side of the front enclosure panel. 5 Snap the left side of the bezel into place by inserting the interlocking notch into the latch retainer on the left side of the front enclosure panel.
This section describes how to remove and install physical disks in your storage enclosure. CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before you begin this procedure, review the safety instructions that came with the system. NOTICE: Extra care must be taken when handling and storing physical disks. The carriers provide some protection, but the physical disks and carrier connectors can be damaged by rough handling.
Figure 3-2. Installing and Removing Physical Disks 1 1 2 carrier release mechanism 2 physical disk carrier handle 4 Open the physical disk carrier handle by rotating it downward. 5 Gently but firmly pull the physical disk carrier from its slot while supporting the weight of the physical disk from the bottom. Installing Physical Disks in the Enclosure NOTICE: To ensure proper airflow for enclosure cooling, each slot should contain either an active physical disk or a physical disk blank.
4 Secure the physical disk to the carrier using the four screws removed earlier. To avoid damaging the carrier, do not overtighten. Figure 3-3. Installing the Physical Disk in the Carrier 3 2 1 1 screws (4) 2 physical disk carrier 3 physical disk (top) 5 With the physical disk carrier handle open, carefully align the physical disk carrier guide rail with the appropriate disk slot on the chassis and insert the physical disk (see Figure 3-2).
6 Push the physical disk carrier into the slot until the bottom of the 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 physical disk is inserted properly. If the indicator is not illuminated, see "Troubleshooting Physical Disks" on page 49.
Removing an EMM NOTICE: If you remove an EMM from an enclosure operating in split mode while connected to a host server, you will lose connection to the physical disks attached to the removed EMM. 1 Push up on the release tab on the left side of the module (see Figure 3-4). 2 At the same time, pull out on the release lever. When the lever is pulled out, the EMM partially ejects from the enclosure. 3 Remove the module from the enclosure and place it on a flat, secure surface.
Installing an EMM 1 Carefully insert the EMM into the empty module slot. 2 Push the module to the back of the slot until it is firmly seated in the backplane connector (see Figure 3-4). 3 Push the release lever 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.
Figure 3-5. Removing and Installing an EMM Module Cover 2 1 1 tabs (2) 2 module cover Removing and Installing the Power Supply/Cooling Fan Module CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before you begin this procedure, review the safety instructions that came with the system. Your enclosure supports two separate modules containing an integrated power supply and four cooling fans.
Removing a Power Supply/Cooling Fan Module NOTICE: Power supply/cooling fan modules are hot-pluggable. Provided one power supply/cooling fan module is functioning normally, you can remove or replace the other while the enclosure is powered on. NOTE: If you remove a fully functioning power supply/cooling fan module, the fan speed in the remaining module will increase significantly to provide adequate cooling. The fan speed will decrease gradually when a new power supply/cooling fan module is installed.
CAUTION: The power supply/cooling fan modules are heavy. Use both hands when removing. 3 Press the release tab inward and grasp the handle on the power supply, carefully pulling the module out of the bay (see Figure 3-6). NOTICE: The power-supply handle is provided to ease the task of pulling the module from the bay. Do not use this handle to carry the module, or use it to carry the enclosure itself.
4 Remove the physical disks in slots 0 through 7 from the enclosure (see "Removing and Installing Physical Disks" on page 28). NOTE: To avoid confusion when re-installing the physical disks, mark each disk with its slot position as you remove it. Figure 3-7. Removing and Replacing the Control Panel 1 1 2 control panel 2 release plunger 5 Pull the release plunger toward the inside of the empty enclosure and slide the control panel straight out from its connector on the backplane (see Figure 3-7).
Installing the Control Panel 1 Align the top and bottom channels on the control panel with the insert slots on the edge of the chassis (see Figure 3-7). 2 Slide the control panel into the slot, pulling the release plunger toward the inside of the enclosure. Once the control panel is halfway into the slot, release the release plunger and push the panel fully into the enclosure. The release plunger will snap into place when it seats securely into the backplane connector.
Figure 3-8. Removing and Replacing the EMM/Power Supply Cage 4 3 1 2 1 screws (7) 3 alignment pin (6) 2 removal ring 4 EMM/power supply cage 5 Grasp the cage removal ring in the bottom center of the rear enclosure. Pull out and lift up and over the alignment pins to remove the cage from the enclosure. 6 Remove the six Phillips screws holding the midplane in place and pull it out of the enclosure. (See Figure 3-9.) 7 To re-install the midplane, reverse the previous steps.
Figure 3-9. Removing and Installing the Midplane 2 1 1 screws (6) 2 midplane NOTE: If you replace a midplane on an existing enclosure, you must reset your Service Tag information. Consult with your Dell service representative if you are not familiar with this process. Also, if you modified the temperature warning thresholds to be different from the default enclosure values, use your management software to restore your desired temperature threshold values.
Installing Enclosure Components
Troubleshooting Your Enclosure Safety First—For You and Your Enclosure To perform certain procedures in this document, you must work inside the enclosure. While working inside the enclosure, do not attempt to perform service except as explained in this guide and elsewhere in your documentation. CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system.
• Disconnecting the cables to the enclosure or EMM while the server is online • Powering down the enclosure while the server is online NOTE: In a split-mode configuration, these conditions apply to the server that is directly attached to the affected EMM. In a unified-mode configuration, these conditions apply when communication is lost to any enclosure in the daisy chain.
Action • Foreign Configuration 1 Enter the Ctrl-R utility 2 Import the foreign configuration (right click "controller" for a drop-down menu with this selection). • Failed Virtual Disks NOTE: This warning message appears if one or more virtual disk(s) are spanned across two or more enclosures or if an enclosure in split mode is shared by one server. 3 During POST, press to enter the Ctrl-R utility.
Troubleshooting a Wet Enclosure Problem • Liquid spilled on the enclosure. • Excessive humidity. Action CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before you begin this procedure, review the safety instructions that came with the system. 1 Turn off the enclosure and disconnect all power. 2 Remove all the physical disks from the enclosure. See "Removing and Installing Physical Disks" on page 28.
Action CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before you begin this procedure, review the safety instructions that came with the system.
If the DC power LED is not lit, verify that the power switch 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.
Action CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before you begin this procedure, review the safety instructions that came with the system. 1 If available, run the appropriate diagnostic test from Server Administrator. 2 Locate the malfunctioning fan. 3 Ensure that the faulty power supply/cooling fan module is properly connected to the enclosure midplane. 4 If the problem persists, see "Getting Help" on page 53.
Problem • Physical disk status LED is flashing amber. Action 1 Review the Server Administrator alert logs for possible recovery actions. NOTE: If a physical disk rebuild is under way, allow the rebuild to complete before viewing the alert logs. 2 Remove the physical disk from the enclosure. See "Removing and Installing Physical Disks" on page 28. 3 Inspect the physical disk and midplane connectors for obvious damage. 4 Re-install the physical disk in its original bay.
Troubleshooting Enclosure Connections Problem • Enclosure is not seen by attached host controller. Action 1 Verify that the EMM port link status LED 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)" on page 14. 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" on page 21.
Troubleshooting Your Enclosure
Getting Help Contacting Dell For customers in the United States, call 800-WWW-DELL (800-999-3355). NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing slip, bill, or Dell product catalog. Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area.
Getting Help
Glossary This section defines or identifies technical terms, abbreviations, and acronyms used in your system documents. A — Ampere(s). AC — Alternating current. ACPI — Advanced Configuration and Power Interface. A standard interface for enabling the operating system to direct configuration and power management. ambient temperature — The temperature of the area or room where the system is located. ANSI — American National Standards Institute.
BIOS — Basic input/output 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 physical disks. The modules are mounted into a chassis that includes power supplies and fans. BMC — Baseboard management controller.
component — As they relate to DMI, components include operating systems, computer systems, expansion cards, and peripherals that are compatible with DMI. Each component is made up of groups and attributes that are defined as relevant to that component. COMn — The device names for the serial ports on your system. control panel — The part of the system that contains indicators and controls, such as the power button and power indicator.
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 off the root directory are called subdirectories. Subdirectories may contain additional directories branching off them. DMA — Direct memory access. A DMA channel allows certain types of data transfer between RAM and a device to bypass the processor. DMI — Desktop Management Interface.
expansion card — An add-in card, such as a NIC or SCSI adapter, that plugs into an expansion-card connector on the system board. An expansion card adds some specialized function to the system by providing an interface between the expansion bus and a peripheral. expansion-card connector — A connector on the system board or riser board for plugging in an expansion card.
graphics mode — A video mode that can be defined as x horizontal by y vertical pixels by z colors. group — As it relates to DMI, a group is a data structure that defines common information, or attributes, about a manageable component. guarding — A type of data redundancy in which a set of physical disks stores data and an additional physical disk stores parity data. See also mirroring, striping, and RAID. h — Hexadecimal.
internal processor cache — An instruction and data cache built into the processor. IP — Internet Protocol. IPX — Internet package exchange. IRQ — Interrupt request. A signal that data is about to be sent to or received by a peripheral device travels by an IRQ line to the processor. Each peripheral connection must be assigned an IRQ number. Two devices can share the same IRQ assignment, but you cannot operate both devices simultaneously.
LAN — Local area network. A LAN is usually confined to the same building or a few nearby buildings, with all equipment linked by wiring dedicated specifically to the LAN. lb — Pound(s). LCD — Liquid crystal display. LED — Light-emitting diode. An electronic device that lights up when a current is passed through it. Linux — A UNIX-like operating system that runs on a variety of hardware systems.
memory address — A specific location, usually expressed as a hexadecimal number, in the system’s RAM. memory module — A small circuit board containing DRAM chips that connects to the system board. memory — An area in your system that stores basic system data. A system can contain several different forms of memory, such as integrated memory (ROM and RAM) and add-in memory modules (DIMMs). MHz — Megahertz.
partition — You can divide a physical disk into multiple physical sections called partitions with the fdisk command. Each partition can contain multiple logical physical disks. You must format each logical disk with the format command. PCI — Peripheral Component Interconnect. A standard for local-bus implementation. PDU — Power distribution unit. A power source with multiple power outlets that provides electrical power to servers and storage systems in a rack.
PXE — Preboot eXecution Environment. A way of booting a system via a LAN (without a physical disk or bootable diskette). RAC — Remote access controller. RAID — Redundant array of independent disks. A method of providing data redundancy. Some common implementations of RAID include RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 50, and RAID 60. See also guarding, mirroring, and striping. RAM — Random-access memory. The system’s primary temporary storage area for program instructions and data.
SCSI — Small computer system interface. An I/O bus interface with faster data transmission rates than standard ports. SDRAM — Synchronous dynamic random-access memory. sec — Second(s). serial port — An I/O port used most often to connect a modem to your system. You can usually identify a serial port on your system by its 9-pin connector. service tag — A bar code label on the system used to identify it when you call Dell for technical support.
system board — As the main circuit board, the system board usually contains most of your system’s integral components, such as the processor, RAM, controllers for peripherals, and various ROM chips. system configuration information — Data stored in memory that tells a system what hardware is installed and how the system should be configured for operation. system diskette — See bootable diskette. system memory — See RAM.
utility — A program used to manage system resources—memory, physical disks, or printers, for example. UTP — Unshielded twisted pair. A type of wiring used to connect systems in a business or home to a telephone line. V — Volt(s). VAC — Volt(s) alternating current. VDC — Volt(s) direct current. VGA — Video graphics array. VGA and SVGA are video standards for video adapters with greater resolution and color display capabilities than previous standards.
W — Watt(s). WH — Watt-hour(s). win.ini file — A start-up file for the Windows operating system. When you start Windows, it consults the win.ini file to determine a variety of options for the Windows operating environment. The win.ini file also usually includes sections that contain optional settings for Windows application programs that are installed on the physical disk.
Glossary
Index A bay cover, 34 installing, 34 removing, 33 alarms, 19 C cabling enclosure options, 21 split mode, 22 unified mode, 22 enclosure mode cabling, 21 changing, 25 split, 21 unified, 21 contacting Dell, 53 F cooling fan features, 18 troubleshooting, 48 firmware downloading, 26 D front-panel indicators LED indicators, 10 damaged systems troubleshooting, 46 Dell contacting, 53 E enclosure installing, 27 managing, 26 enclosure management module, 14 front bezel removing and replacing, 27 H hard d
cage, 39 installing and replacing, 39 P phone numbers, 53 damaged system, 46 external connections, 45 hard drive, 49 power supplies, 47 start-up routine, 43 system cooling, 48 wet system, 46 power supplies troubleshooting, 47 power supply features, 18 R rack-mounted systems installing, 21 S safety, 43 support contacting Dell, 53 system cooling troubleshooting, 48 T telephone numbers, 53 thermal thresholds, 18 tools needed, 27 troubleshooting, 43 cooling fan, 48 82 Index W warranty, 7
