Dell MD1000 Enclosure Failover When Two EMMs are Installed, Enclosure Mode Switch Settings

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Figure 1-7. Enclosure Mode Switch Settings

1

2

1 unified mode switch setting

2

split mode switch setting

NOTE: To change the enclosure mode, you must change the position of the enclosure mode switch before turning on power to the enclosure. Changing the position of the switch while the enclosure is on will not affect enclosure operation until the enclosure is rebooted.

For a complete description of the roles of the primary and secondary EMMs, see "Operating Your Storage Enclosure."

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. The surviving EMM then takes over the responsibility of enclosure management, which includes monitoring and control of the audible alarm, enclosure LEDs, power supplies, and fans.

Failover does not include providing connectivity to the drives controlled by the failed EMM. When a failed EMM is replaced, enclosure management functions do not automatically return to the replaced EMM unless an additional failure occurs that triggers another failover event.

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About Your System

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Contents Dell PowerVault MD1000 Storage Enclosure May Contents Troubleshooting Your Enclosure Getting Help Contents About Your System Other Information You May NeedIndicators on the Enclosure Bezel Front-Panel Indicators and Features Front-Panel Components Icon ConditionDrive Carrier LED Indicators Drive Carrier LED IndicatorsBack-Panel Indicators and Features LEDBack-Panel Features Enclosure Management Module EMMEMM External Panel EMM Component Functions Icon Unified Mode and Split Mode About Your System Enclosure Failover When Two EMMs are Installed Enclosure Mode Switch SettingsPower Supply and Cooling Fan Features EMM Thermal ShutdownEnclosure Alarms Critical and Noncritical Events Critical EventsOperating Your Storage Enclosure Cabling Your Enclosure for Unified or Split ModeBefore You Begin Connecting the Enclosure Unified Mode Split Mode Minimum Requirements Operating Your Storage Enclosure Changing Your Enclosure’s Operating Mode Managing Your Storage Enclosure Downloading FirmwareOperating Your Storage Enclosure Recommended Tools Installing Enclosure ComponentsRemoving and Replacing the Front Bezel Removing and Installing Drives Installing and Removing the Front BezelInstalling and Removing Drives Removing Drives from the EnclosureInstalling SAS Drives in the Enclosure Installing the Drive in the Carrier Installing Sata Drives in the Enclosure Screws Removing and Installing an EMM Removing an EMMInstalling an EMM Removing and Installing an EMMRemoving and Installing the Power Supply/Cooling Fan Module Installing an EMM Module Cover in an Empty BayInstalling and Removing an EMM Module Cover Removing a Power Supply/Cooling Fan Module Replacing the Power SupplyInstalling a Power Supply/Cooling Fan Module Removing and Installing the Control PanelRemoving the Control Panel Installing the Control Panel Removing and Replacing the Control PanelRemoving and Installing the Midplane Removing and Replacing the EMM/Power Supply Cage10. Removing and Installing the Midplane Installing Enclosure Components Troubleshooting Your Enclosure Safety First-For You and Your EnclosureTroubleshooting a Loss of Communication Condition Start-Up RoutineForeign Configuration Failed Virtual Disks Troubleshooting External Connections Troubleshooting a Wet EnclosureTroubleshooting a Damaged Enclosure Troubleshooting Power SuppliesTroubleshooting Enclosure Cooling Problems Troubleshooting SAS and Sata Drives Troubleshooting a FanTroubleshooting Enclosure Connections Troubleshooting Your Enclosure Getting Help Online ServicesTechnical Assistance Automated Order-Status Service AutoTech ServiceTechnical Support Service Getting Help Before You Call Contacting DellGlossary GlossaryDIN Deutsche Industrie Norm Glossary Glossary Glossary System memory See RAM Glossary Glossary Index Index
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MD1000 specifications

The Dell MD1000 is a storage enclosure designed to provide a scalable and reliable solution for enterprises seeking efficient data storage management. Recognized for its robust performance and versatility, the MD1000 supports a variety of applications, making it a popular choice among organizations that demand high-capacity storage solutions.

One of the standout features of the MD1000 is its modular design, allowing it to integrate seamlessly with various Dell server systems. It provides efficient data storage through its 3.5-inch drive bays, accommodating up to 15 hard drives or solid-state drives. This configuration not only facilitates higher storage density but also supports SATA and SAS drives, offering the flexibility to choose different types of storage media based on organizational needs.

The MD1000 features advanced RAID (Redundant Array of Independent Disks) technology, which enhances data protection and system performance. It supports multiple RAID levels, including RAID 0, 1, 5, 6, and 10, providing users with different options for balancing performance and redundancy. By leveraging RAID, the MD1000 ensures that data remains safe and accessible even in the event of hardware failure, significantly reducing downtime and risk.

Connectivity is another strength of the MD1000. It typically interfaces with a server through a variety of host interface options including iSCSI and Fibre Channel, making it adaptable to different network configurations. This connectivity flexibility supports various environments, ensuring organizations can scale their storage without significant infrastructure overhauls.

Cooling and power efficiency are also critical characteristics of the MD1000. It includes dual-redundant power supplies and cooling fans that not only enhance reliability but also lower operational costs. These components can function independently, ensuring that power loss in one does not affect overall system performance.

Management and monitoring capabilities of the MD1000 are empowered by the Dell OpenManage software, which provides a user-friendly interface to manage the storage subsystem. Users can easily monitor drive health, configure RAID settings, and receive alerts on potential issues, simplifying the administration of large storage networks.

Overall, the Dell MD1000 is built to accommodate growing storage needs while ensuring reliability, performance, and ease of use. With its modular design, support for various drive types, robust RAID capabilities, versatile connectivity options, and efficient power management, it represents an excellent choice for businesses looking to enhance their data storage infrastructure.
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