Dell MD1200, MD1220 manual Troubleshooting Enclosure Management Modules

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Troubleshooting Enclosure Management Modules

CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service

and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

CAUTION: It is recommended that you turn off the host server before turning off the enclosure to prevent loss of data.

•If the EMM status LED is solid or blinking amber (2 or 4 times per sequence): a Turn off the server.

b Remove the EMM and verify that the pins on backplane and EMM are not bent. See "Removing an EMM" on page 37.

c Reinstall the EMM and wait for 30 seconds. See "Installing an EMM" on page 39.

d Turn on the server.

e Check the EMM status LED.

If the problem is not resolved, see "Getting Help" on page 57.

•If EMM status LED is blinking amber (5 times per sequence), update the firmware to the latest supported firmware on both the EMMs. For more information about downloading the latest firmware, see "Downloading Firmware" on page 26.

•If the link status LEDs are not green: a Turn off the server.

b Reseat the cables on the storage enclosure and the server.

c Restart the storage enclosure and wait until enclosure is fully booted. d Turn on the server.

e Check the link status LED. If the link status LED is not green, proceed to the next step.

f Replace the cables.

If the problem is not resolved, see "Getting Help" on page 57.

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Troubleshooting Your Enclosure

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Contents Dell PowerVault MD1200 and MD1220 Storage Enclosures October Contents Installing Enclosure Components Troubleshooting Your Enclosure Contents Front-Panel Features and Indicators About Your EnclosureEnclosure power is on Front-Bezel Features and Indicators Connector Hard drives Enclosure mode switchIndicator, Button, or Icon Hard-Drive Indicator Patterns Hard Drive IndicatorsBack-Panel Features and Indicators Enclosure Management Module OUT Lights green when all the links out Enclosure Alarms Enclosure Failover When Two EMMs are InstalledEMM Thermal Shutdown Power Indicator Codes Other Information You May Need Before You Begin Operating Your Storage EnclosureCabling Your Enclosure Connecting the Enclosure Connecting a SAS Cable SAS cable Pull-tab Page Page Host controller Changing Your Enclosure’s Operating Mode Managing Your Storage Enclosure Downloading FirmwareInstalling Enclosure Components Recommended ToolsFront Bezel Optional Removing the Front BezelInstalling the Front Bezel Hard Drives Safety Models AMT, E03J, and E04JRemoving a Drive Blank Release tab Installing a Drive Blank Removing a Hard DriveInstalling a Hard Drive Removing and Installing a Hard Drive Release buttonRemoving a Hard Drive From a Hard-Drive Carrier Screws Installing a Hard Drive Into a Drive Carrier Removing an EMM BlankInstalling an EMM Blank Removing and Installing an EMM Blank Release latch EMM blankRemoving an EMM Removing and Installing an EMM Installing an EMM Power Supply/Cooling Fan ModuleRemoving a Power Supply/Cooling Fan Module Removing and Installing a Power Supply/Cooling Fan Module Installing a Power Supply/Cooling Fan Module 10. Securing the Power Cable Velcro strapControl Panel Removing the Control PanelRelease pin Backplane Installing the Control PanelRemoving the Backplane Page Captive screw Installing the Backplane Installing Enclosure Components Troubleshooting Loss of Communication Troubleshooting Your EnclosureTroubleshooting External Connections Troubleshooting Power Supply/Cooling Fan Module Troubleshooting Enclosure Cooling Problems Troubleshooting Enclosure Management Modules Troubleshooting Hard Drives Troubleshooting Enclosure Connections Troubleshooting a Wet EnclosureTroubleshooting a Damaged Enclosure Troubleshooting Your Enclosure Getting Help Contacting DellGetting Help Glossary Amperes AC Alternating currentCPU Central processing unit. See processor DC Direct current Page Page Mm Millimeters Ms Milliseconds Page System memory See RAM Watts Glossary Page Glossary Index Index
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MD1200, MD1220 specifications

The Dell MD1200 and MD1220 are robust direct-attached storage solutions designed to enhance data management and storage capabilities in enterprise environments. Both systems are characterized by their scalability, performance, and ease of integration, making them ideal for businesses with evolving storage requirements.

The Dell MD1200 supports up to 12 drives, while the MD1220 scales up to 24 drives, providing ample capacity for various workloads. These storage arrays are equipped with a mix of SAS and SATA drive options, allowing organizations to balance performance and cost based on their unique needs. The flexibility in drive choice facilitates effective data tiering; users can deploy high-speed SSDs for critical applications alongside cost-effective HDDs for archival data.

One of the key features of both models is their adherence to the latest SAS technology standards. The MD1200 and MD1220 utilize Serial Attached SCSI (SAS) 6Gb/s interface, ensuring high-speed data transfer rates and low latency. This technology is integral for businesses dealing with data-intensive applications such as databases, virtualization, and backup operations.

The systems also come equipped with advanced data management features. They support RAID configurations, including RAID 0, 1, 5, 6, and 10, enabling users to choose the right level of redundancy and performance. RAID ensures data integrity and availability, which is crucial for mission-critical applications.

Additionally, the MD1200 and MD1220 support hot-swappable drives, allowing users to replace malfunctioning units without shutting down the system. This capability minimizes downtime and boosts overall productivity. Coupled with built-in battery backup units, these storage solutions provide a layer of data protection in case of power failures.

Both models feature a user-friendly management interface, which simplifies the deployment and monitoring of storage resources. This web-based console offers a centralized view, enabling IT administrators to manage alerts, configure settings, and analyze performance metrics easily.

In conclusion, the Dell MD1200 and MD1220 storage systems stand out in the market due to their blend of scalability, performance, and user-centric features. They are designed to meet the demanding storage needs of modern enterprises, ensuring reliable data management and operational efficiency. With their flexibility and advanced technology, both models are solid choices for businesses seeking to optimize their storage infrastructure.
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