Hitachi 9900 manual Ctq, Das

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Hitachi Data Systems

CTQ

Command-Tag Queuing.

DA

The Data Adapter resides on the CHT and connects the cache boards to the front end.

DAS

Direct Attached Storage.

Data Availability

Data availability refers to the degree to which a computer system is capable of providing data to its users. See also Availability.

Data Copy

A term that refers to remote copy, data duplication, and data migration.

DD

Disk Director.

Data Duplication

Software that duplicates data as in remote copy or point-in-time (PiT) snapshots. Data duplication is differentiated from data migration in that with data duplication, at the end of the process there are two copies of data and with data migration there is only one.

Data Migration Software

Software that migrates data from one storage device to another. This feature is different from data duplication in that at the end of the process there is only one copy of data.

Disaster Recovery

Disaster Recovery is the profession that plans to avoid disasters and to restore services after a disaster. It also indicates the level of preparedness to respond to an interruption in services by implementing a disaster recovery plan to restore an organization's critical business functions.

Downtime

A planned or unplanned interruption in system availability. Planned downtime is usually for scheduled system maintenance and unplanned downtime usually includes business interruptions or disasters. See also Business Interruptions, Disaster Recovery, Business Continuity Planning (BCP), and Availability.

DR

Disaster Recovery.

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Contents Page Page Page Hitachi Data Systems Table of Contents RAID-1+ Hitachi Freedom Storage Software Solutions Are Best of Breed Global Solutions Services Table of Figures C-HSN of a Lightning 9970V system provides fully redundantTables Introduction Redefining the Industry Standard, Once AgainComparison of Lightning 9900 V Series models Lightning 9900 V Series Product OfferingsIntroduction An Overview of the Lightning 9900 V Series ArchitectureLimitation of Competitive Shared-bus Architectures Reduced TCO Second-generation Virtual Switched Storage Heterogeneous solutions today Hitachi Data Systems Lightning 9980V System Control Frame Hitachi Freedom Storage Lightning 9900 V Series PackagingHitachi Freedom Storage Lightning 9980V System Packaging Lightning 9980V system Array Frame with its major components Lightning 9980V System Array FramesHitachi Freedom Storage Lightning 9900 V Series Packaging Hitachi Freedom Storage Lightning 9970V System PackagingLightning 9970V system single- cabinet storage system System Monitoring Network of the Lightning 9900 V SeriesPage About the Fibre Channel Interface Boards Page Bandwidth of Supported Host Interfaces Number of Host Interfaces SupportedInternal Hi-StarArchitecture Cache Hierarchical Star NetworkCache Switch Provides Non-blocking Switched Access to Cache Advanced Cache Algorithms of the Lightning 9900 V SeriesRead-ahead for High-performance Sequential Reads Control Memory Hierarchical Star NetworkPage Hitachi Data Systems High-performance Back-end 5 Design High-speed All Fibre Channel Back-end DesignNew Fibre Channel Disk Drives Maximum Configuration of ACPs and DisksImportance of Command Tag Queuing CTQ Capacities and RAID Architecture Advantages of the Lightning 9900 V Series RAID HardwareRAID-5 Distributed Parity RAID Rebuild CapabilityHigh-density Disk Drive HDD Assemblies An Overview of High-availability HA Computing Software Software Products Contribute to High-availability ComputingOpen Systems High-availability Middleware Support Host Failover Standard Hot Swap and Redundant Power Supplies Parallel Database ClusteringStandard Redundant Fans for Cooling Competitive Advantage in RAID ChoicesHitachi Data Systems Unmatched Performance and Scalability Truly Scalable PerformanceHitachi Data Systems Hitachi Freedom Storage Software Solutions Are Storage Area Management SuiteSummary of Hitachi Freedom Storage software products OS Support Software SuiteBusiness Continuity Suite Backup and Recovery Suite Performance Enhancement SuiteData Movement Suite Hitachi Data Systems HiCommand Powerful and Open Systems Management PhilosophyHitachi Data Systems Open, Standards-based Approach CIM Benefits to CustomersView and Operate Networked Storage as a Holistic Resource Avoid Being Locked into a Proprietary Management EnvironmentProduct Support Out-of-band ManagementJava Agent Host Storage DomainsHitachi SANtinel Software Hitachi Virtual LUN and LUN Expansion Software Remote Console Storage Navigator Cache Manager Host Agent Phase 2 On-site, One-day Assessment HiReturn Investment Analysis Tool KitHitachi Data Systems Basic Implementation Service for InterSAN Pathline Global Solutions ServicesGlobal Solutions Services Overview Implementation Service for Hitachi TrueCopy Software Integration Service for Hitachi TrueCopy SoftwareImplementation Service for Hitachi ShadowImage Software Integration Service for Hitachi ShadowImage SoftwareGlobal Solutions Services Fiber Design and Implementation ServiceInfrastructure Planning Service for Ficon Storage Consolidation Planning and Design ServiceStorage Consolidation Implementation Service Open Systems Data Migration Planning ServiceAPI Glossary of TermsACP Carb CHA ChipHSN CHTCTQ DASDRR DSSDTA ECCFCA FC-ALFile Backup Freedom Data NetworksFibre Channel FiconGUI HDDHitachi FlashAccess Hitachi Multiplatform Backup/RestoreHitachi Dynamic Link Manager Hitachi Graph-TrackHitachi Priority Access Hitachi Rapid RecoveryHitachi Multiplatform Resource Sharing Hitachi RapidXchangeHSD LAN LUN LparLuse LRUMplf MtbfMttr NASNdmp NVMNvram OltpPOD RAID SANScsi SLASnmp SVPVeritas TCOTCP XRC WANWWN Hitachi Data Systems Worldwide Offices