EMC ATA, FC manual Introduction

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About DAE2 Disk Enclosures

Any DAE2 can support up to fifteen 3.5-inch disk modules. Simple serial cabling provides easy scalability. You can interconnect as many as eight DAE2s to Fibre Channel loops (sometimes called busses) to form a large disk storage system. The number of loops depends on the capabilities of your storage processor; highly available configurations require at least two loops, other configurations use a single loop. You can place the disk enclosures in the same cabinet, or in one or more separate cabinets. High-availability features are standard.

The DAE2 includes the following components:

◆A sheet-metal enclosure with a midplane and front bezel

◆Two link control cards (LCCs)

◆As many as 15 disk modules

◆Two power supply/system cooling modules

The power supply and system cooling components of the power/cooling modules function independently of each other, but the assemblies are packaged together into a single field-replaceable unit (FRU).

Any unoccupied disk module slot has a filler module to maintain air flow.

The LCCs, disk modules, power supply/system cooling modules, and filler modules are field-replaceable units (FRUs), which you can add or replace without tools while the array is powered up.

Standard DAE2 disk modules are FC-AL compliant and support dual-port FC-AL interconnects through the two LCCs and their cabling. ATA disk modules include dual-port ATA interconnects; the FC-to-ATA link control cards provide the bridge between Fibre Channel and ATA signals.

You can integrate and connect FC and ATA enclosures within a storage system, but you cannot mix ATA and fibre components within a DAE2. Standard link control cards will not recognize ATA disk drives, and ATA link control cards will not recognize fibre channel disks.

The system can continue running with one operating power supply and a single functional LCC. At least three of the four system cooling blowers must be running correctly for continuous operation.

Figures 1-2 through 1-4 show the disk enclosure components. Details on each component accompany the figures. Where the enclosure provides slots for two identical components, the components are

Introduction

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Contents FC and ATA Models EMC 2-Gigabit Disk-Array Enclosure DAE2Copyright 2002, 2003 EMC Corporation. All rights reserved Regulatory Notices Gigabit Disk-Array Enclosure DAE2 Hardware Reference Contents Chapter Servicing a DAE2 Appendix a Technical SpecificationsFigures Figures Preface Related Documentation Conventions Used in This Guide All Storage Systems on the Operations menu Sales and Customer Service Contacts Xiii Replacing the Lithium Battery About DAE2 Disk Enclosures DAE2 IntroductionIntroduction LED 3Disk Enclosure Rear View Front Bezel MidplaneMonitoring Disk Enclosure Status in Chapter Link Control Cards LCCsDrive Carrier Disk ModulesDisk Drives 8Power Supply/System Cooling Module Power Supply/System Cooling ModulesGigabit Disk-Array Enclosure DAE2 Hardware Reference Installing a DAE2 Site Requirements RequirementsCabling RequirementsRecommendations Installing a Disk Enclosure in a CabinetSetting Up an Installed Disk Enclosure Address +Switch 2Plugging in the ac Line Cord DAE2 PRI SPE LCC B Powerup and Initialization Binding Disk Modules into RAID Groups Servicing a DAE2 Describes the LEDs visible from the front of the DAE2 Monitoring Disk Enclosure StatusLight Quantity Color Meaning Shows the status LEDs for the power/cooling modules Shows the status LEDs for the link control cards Handling FRUs An ESD Kit Procedures WithoutEmergency Precautions When Removing, Installing, or Storing FRUs Replacing or Adding a Disk Module 5Unlocking and Removing the Front Bezel Unlocking and Removing the Front BezelRemoving a Disk Module Removing a Disk Filler Module7Removing a Disk Module FC Disk Carrier Shown Installing a Disk or Filler Module8Installing a Disk or Filler Module FC Disk Carrier Shown 9Installing and Locking the Front Bezel Installing and Locking the Front BezelRemoving an LCC Replacing an LCC Module11Removing an LCC Installing an LCC12Installing an LCC Remove and store the ESD wristband 14Connecting Disk Enclosures Together with Copper Cable Replacing a Power Supply/System Cooling Module 16Removing a Power Supply/System Cooling Module 18Plugging in the Power Cord and Turning on Power Technical Specifications Ac Power Enclosure SpecificationsLCC FC-AL Interface Size and WeightDrive Type Fibre Channel Related Standards Standards Certification and ComplianceShipping and Storage Requirements Operating LimitsGigabit Disk-Array Enclosure DAE2 Hardware Reference Index LCC Gigabit Disk-Array Enclosure DAE2 Hardware Reference Gigabit Disk-Array Enclosure DAE2 Hardware Reference

FC, ATA specifications

EMC ATA (Advanced Technology Attachment) and FC (Fibre Channel) are two significant technologies in storage networking that enhance data management and access in enterprise environments.

EMC ATA, often associated with ATA storage devices, offers a cost-effective solution for managing large volumes of data. Shipments of ATA drives have become increasingly popular in the realm of consumer electronics due to their affordability and capacity. EMC utilizes ATA drives in various storage solutions, primarily focusing on performance and reliability. These drives handle particular workloads effectively, making them suitable for environments that require mass data storage, such as digital media and backup solutions.

In terms of key features, EMC ATA solutions provide high capacity, reliability, and cost-effectiveness. They are designed to manage routine data storage tasks with ease. These storage devices utilize interfaces that provide straightforward integration with various computer systems. Additionally, EMC ATA solutions come with error detection features and are generally simple to deploy, which is beneficial for teams seeking efficiency without an extensive learning curve.

On the other hand, Fibre Channel (FC) is a high-speed network technology primarily used for interconnecting storage area networks (SANs). Its robust architecture allows for high-speed data transfer rates, typically ranging from 2 Gbps up to 128 Gbps in contemporary systems. The strengths of FC lie in its ability to provide low-latency communications and its reliability in handling large volumes of data traffic.

Fibre Channel's main characteristics include its ability to support multiple protocols, such as SCSI and IP. This compatibility makes it a flexible choice for various storage solutions, especially in large-scale enterprise environments. Additionally, FC switches and directors enable the creation of complex SAN architectures, which can be both scalable and high-performing.

Furthermore, FC ensures data integrity through features such as error correction and data recovery mechanisms, making it an ideal choice for mission-critical applications. Secure connectivity is also a fundamental aspect of Fibre Channel technology, as it continuously secures data as it flows through the network.

Combining the strengths of EMC ATA's cost-effectiveness in bulk storage and the high-performance capabilities of Fibre Channel, organizations can achieve a balanced storage solution tailored to their operational needs. As data storage demands continue to grow, these technologies remain relevant, supporting both traditional and cutting-edge applications in enterprise IT environments.
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