Hitachi 9960 Capacities and RAID Architecture, Storage Capacity of the Lightning 9900 Series

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Capacities and RAID

Capacities and RAID

Architecture

Storage Capacity of the Lightning 9900™ Series

The Lightning 9900™ Series supports an unmatched range of capacities as shown in Table 3.

System Capacities and Number of disk drives for various configurations

Raw System

Raw capacity with

Raw capacity with

Raw capacity with

Configuration

18GB drives

73GB drives

180GB drives

 

 

 

 

Lightning 9960

 

 

 

One Array Frame

1.7TBs = 96 disks

7.0TB = 96 disks

16.6TB = 96 disks

 

 

 

 

Lightning 9960

 

 

 

Six Array Frames

9.4TB = 512 disks

37.4TB = 512 disks

88.3TB = 512 disks

 

 

 

 

Lightning 9910

.9TB = 48 disks

3.5TB = 48 disks

8.3TB = 48 disks

 

 

 

 

Advantages of the Lightning 9900™ Series RAID Hardware

Hitachi designs the most advanced RAID (Redundant Array of Independent Disks) controllers in enterprise storage to interface to its disk subsystems. These intelligent controllers provide disk interface and RAID management, offloading these tasks to dedicated processors. Each Lightning 9900™ Series ACP controller supports RAID-1+ and RAID-5 (parity RAID). All disks in the system are defined as part of a RAID array of one type or another. Non-volatile RAM on each controller accelerates RAID functions, particularly disk writes.

RAID-1+

With the announcement of the Lightning 9900 Series RAID-1+ was introduced. RAID-1+ is a 2 Data + 2 Data disk arrangement (four disks total) in a RAID-1+0 configuration with a twist – a rotating copy.

RAID-5 – Distributed Parity

RAID-5 arrays consist of four disks. Data is striped across RAID-5 arrays in a fashion similar to RAID-1+, but RAID-5 provides fault resilience by keeping parity information on each stripe of data. If a failure occurs, the contents of that block can be recreated by reading back the other blocks in the stripe along with the parity. Parity information is distributed throughout the array to minimize potential bottlenecks in the event of a need to rebuild data from a failed disk. The overhead of RAID-5 is equivalent to one disk drive, regardless of the size of the array.

RAID Rebuild Capability

In the event of a disk failure, RAID-1+ or RAID-5 arrays can be rapidly and automatically rebuilt using available “hot-spare” drives. The Lightning 9900™ also allows logical volumes to be expanded online. Configurations for RAID-1+ and RAID-5 are shown in Figure 20.

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Table 3 – System capacities and number of disk drives for various configurations.

Intelligent controllers offload tasks to dedicated processors.

RAID-1+ is unique to Hitachi.

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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 SystemsLightning 9900 Series Product Offerings IntroductionThe most advanced design in storage 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 subsystemSeries Front-endDesign of theHitachi Lightning Hitachi Data Systems About the Fibre Channel Interface BoardsPage Number of Host Interfaces Supported Hitachi Data SystemsBandwidth of Supported Host Interfaces 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 New Fibre Channel Disk Drives High Performance Back-endDesignHigh-speed Back-endDesign 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 4.Parallel Database Clustering Standard Hot-swapand Redundant Power SuppliesHitachi Data Systems 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 SystemsData Migration Remote CopyPiT Copy 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 SynchronousWorkload Hitachi Data SystemsWarm site Hitachi Data Systems Worldwide Offices Corporate HeadquartersAsia Headquarters Australia/New Zealand Headquarters
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