Hitachi 9960, 9900 Series Glossary, Raid, RAID Controllers, Recovery Time, Remote Copy Links

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RAID

Glossary

RAID

Redundant Array of Independent Disks. RAID is used to increase the reliability of disk arrays by providing redundancy either through complete duplication of the data (RAID-1, i.e., mirroring) or through construction of parity data for each data stripe in the array (RAID-3, -4, -5). RAID-5, which distributes parity information across all disks in an array, is among the most popular means of providing parity RAID since it avoids the bottlenecks of a single parity disk. The Lightning 9900™ algorithms enable performance from RAID-5 that is competitive with some vendor's RAID-1. Some vendors do not offer RAID-5.

RAID Controllers

RAID controllers provide a highly optimized scheme for securely managing RAID configurations on storage systems. Hitachi RAID controllers allow RAID arrays to be expanded online, and support conversion of an array from one RAID level to another.

Recovery Time

The period from the disaster declaration to the recovery of the critical functions.

Remote Copy

Remote Copy refers generically to software or hardware utilities that provide the capability to copy data from one online volume to remote volumes without disruption. Synchronous techniques are used for short distances (typically less than 25 miles), and asynchronous techniques over LAN/WAN/MAN are used at any distance.

Remote Copy Links

This term refers to the links used between storage systems for the movement of data. Today these links are either direct connect ESCON, Fibre Channel or network links (T3, ATM etc). For direct connect ESCON there is a limit of 43km (25 miles). For direct connect Fibre Channel the limit is 10km. However, newer technologies, such as the Nortel OPTERA™ product are allowing direct fibre connect over longer distances.

Risk Management

The discipline that ensures that an organization does not assume an unacceptable level of risk.

SAN

Storage Area Networks (SANs) connect storage systems to servers through Fibre Channel or Ethernet switches. Hitachi's implementation of SAN is known as Freedom Data Networks (FDN). Major benefits of SANs include outboard backup, sharing of resources, pooling, and reduced cost of storage management. Storage Area Networks (SAN) are high-speed subnetworks of shared storage devices. SAN architecture works in a way that makes all storage devices available to all servers on a LAN or WAN. Because stored data does not reside directly on any of a network's servers, server power is utilized for business applications, and network capacity is released to the end user. See also FDN, Fibre Channel.

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Contents Page Page Hitachi Data Systems Table of Contents Hitachi Data Systems Read-aheadfor High-performanceSequential ReadsRemote Copy Hitachi NanoCopy Implementation Service Hitachi Data SystemsTable of Figures Tables Hitachi Data SystemsThe most advanced design in storage IntroductionLightning 9900 Series Product Offerings The most powerful storage system in the world Hitachi Data SystemsIntroduction Hitachi Data Systems Mirrored cache instead of single image cache.1Introduction Hitachi Data Systems The Lightning 9900 Series PackagingModel 9960 Packaging Model 9960 Control FrameHitachi Data Systems Model 9960 Array FramesThe Lightning 9900 Series Packaging Model 9910 PackagingHitachi Data Systems Figure 7 – A 9910 single-cabinetstorage subsystemHitachi Lightning Front-endDesign of theSeries Hitachi Data Systems About the Fibre Channel Interface BoardsPage Bandwidth of Supported Host Interfaces Hitachi Data SystemsNumber of Host Interfaces Supported Internal Switched Hi-StarArchitecture – AnHierarchical Star Network The Internal Hi-StarArchitectureHitachi Data Systems ArchitecturePage Hitachi Data Systems The 9960 Provides 32GB of Fully Addressable CacheRead-aheadfor High-performanceSequential Reads Control Memory Hierarchical Star NetworkPage Hitachi Data Systems High-speed Back-endDesign High Performance Back-endDesignNew Fibre Channel Disk Drives Command Tag Queuing greatly improves performance Maximum Configuration of ACPs and DisksThe Importance of Command Tag Queuing CTQ Hitachi Data SystemsCapacities and RAID Architecture Storage Capacity of the Lightning 9900 SeriesRAID-1+ RAID-5- Distributed ParityHitachi Data Systems High-densityDisk Drive Assemblies HDDsApplication Service Levels Hitachi High-Availability Software ImprovesHitachi Data Systems Open Systems High-AvailabilityMiddleware Support3.Host Failover Hitachi Data Systems Standard Hot-swapand Redundant Power Supplies4.Parallel Database Clustering Standard Redundant Fans for Cooling Unmatched Competitive Advantage in RAID ChoicesHitachi Data Systems Performance Considerations Truly Scalable PerformanceHitachi Data Systems Test ResultsSoftware Solutions Are the Best in the WorldSoftware Solutions for the The Lightning 9900 SeriesFigure 24 – Hitachi Data Systems offers a broad range of remote copy, data duplication, and data migration software solutions Hitachi Data SystemsPiT Copy Remote CopyData Migration and warehousing Hitachi Data SystemsCentralized and Open Systems ManagementSoftware Simplifies IT Operations A powerful and open systems management philosophyHiCommand is an important Hitachi management tool in that it provides a comprehensive storage management software framework that enables an enterprise to manage all supported Hitachi storage products and many Hitachi software solutions Hitachi Data SystemsThe components of HiCommand Service Level Management Hitachi Data SystemsHitachi Resource Manager Deployment ManagementHitachi LUN Manager is an open systems management utility. With Hitachi LUN Manager, open systems Logical Units LUNs can be defined, configured, and maintained. There is no more waiting for the hardware vendor to come and make configuration changes. Hitachi LUN Manager includes an easy-to-use, GUI-basedinterface that allows the easy definition of paths for LUNs, the reconfiguration of LUN-to-portassignments, or the viewing of the Lightning 9900 remote service information messages. Because the Hitachi LUN Manager can assign multiple paths to a single LUN, support of alternate path failover, path load balancing, and clustered systems is possible. Running on a standard Windows-basedPC connected to the storage subsystems by a dedicated LAN, Hitachi LUN Manager can support up to eight Lightning 9900 systems Hitachi Data Systems Hitachi CruiseControlStorage Maximizer Hitachi SANtinelHitachi Data Systems Professional Services and Support Professional Services OverviewData Protection Services Cost of Risk Analysis methodology CORAData Protection Services Lab Remote Copy Assessment and Implementation ServiceHitachi NanoCopy Implementation Service Hitachi Data SystemsProfessional Services and Support Continuous Availability ServiceOn-lineData Migration Service SAN servicesSoftware Portfolio Review and Analysis Service Hitachi Data SystemsSystem Configurations for the Performance ExperimentHitachi Data Systems The 7700E used all 6GB drivesGlossary of Terms 10BaseT100BaseT ACP pairHitachi Data Systems AvailabilityBack end Business Continuity Planning BCPGlossary CARBCache CHIPHitachi Data Systems Consistency GroupsControl Frame CORA Cost of Risk AnalysisDisaster Recovery GlossaryData Duplication Data MigrationHitachi Data Systems EBCDICElectronic vaulting ESA/390Glossary FailoverFast Ethernet Fast writeFile Backup Hitachi Data SystemsFICON Front EndHitachi FlashAccess GlossaryHDmS Hitachi CruiseControlHitachi Multiplatform Backup/Restore Hitachi Data SystemsHitachi InstantSplit Hitachi LUN ManagerHitachi Rapid Recovery GlossaryHitachi Resource Manager Hitachi SANtinelHitachi Data Systems HXRC Hitachi Extended Remote CopyHYPERtape JavaLogical Volume GlossaryLightning 9900 Series Logical UnitHitachi Data Systems MBCPMIPS Meta-dataGlossary MTBFMTTR NanoCopyHitachi Data Systems On-linesystemOpen system Operating SystemRecovery Time GlossaryRAID RAID ControllersSwitch Hitachi Data SystemsSCSI SnapshotVirtual Logical Volume Image Manager VolumeGlossary SynchronousWarm site Hitachi Data SystemsWorkload Hitachi Data Systems Worldwide Offices Corporate HeadquartersAsia Headquarters Australia/New Zealand Headquarters
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