EMC ATA, FC manual Powerup and Initialization

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Installing a DAE2

6.For proper cooling and normal operation, make sure all the disk module slots in each disk enclosure contain either disk or filler modules.

Do not power up a disk enclosure without at least one LCC installed.

You can configure a driveless disk enclosure within a Fibre Channel loop. High availability with write-caching requires disks in slots 0-4 in the first DPE2 or DAE2 connected to a storage processor (Enclosure Address 0, loop 0).

7.Turn the DAE2 power switch(es) to the on position. If necessary, set the SPS switches, and then the main circuit breaker switches, to the on position. The disk enclosures in the cabinet power up.

Powerup and Initialization

The only power switches on a DAE2 are those on the power supply/system cooling module, which are normally on. As a result, a DAE2 is always active.

When you initially apply ac power to a disk enclosure, the disk drive modules power up according to their specifications, and spin up in a specified sequence dictated by enclosure and loop IDs. The slot spin-up delays range from 0 to 84 seconds. The same delays are used when you insert a drive module while the system is powered up.

The LCC hardware monitor (FRU monitor) resets and begins its control loop. The port bypass circuits enter the states indicated by their associated drives. The monitor continues to run in this local mode until it receives commands that dictate otherwise. In local mode, the monitor maintains the port bypass circuits in the same states as the drive command signals. When a drive fault occurs, the corresponding drive fault light turns on. Firmware commands can take control of the port bypass circuits and the drive status lights.

!CAUTION

The drives read their FC-AL physical address only at powerup or when the drive is reset. To avoid potential data loss, you must set the enclosure address when you install the disk enclosure and power is off; you cannot change the EA while power is on.

Powerup and Initialization

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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 Requirements RequirementsSite Requirements CablingRecommendations 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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