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Promise Technology SX8300, FASTTRAK SX4300 user manual RAID 50 Striping of Distributed Parity

Models: SX8300 FASTTRAK SX4300

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Chapter 5: Concepts

RAID 50 – Striping of Distributed Parity

RAID 50 combines both RAID 5 and RAID 0 features. Data is striped across disks as in RAID 0, and it uses distributed parity as in RAID 5. RAID 50 provides data reliability, good overall performance and supports larger volume sizes. RAID 50 also provides high reliability because data is still available even if two disk drives fail (one in the 1-3-5 data stripe, the other in the 2-4-6 data stripe, as shown in the example below).

Distributed Parity

Data

Stripe

Disk Drives

Figure 5. RAID 50 Striping of Distributed Parity logical drives

RAID 50 logical drives on the FastTrak SX8300 consist of 6 or 8 disk drives.

The FastTrak SX4300 does not support enough disk drives to create a RAID 50 logical drive.

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Promise Technology SX8300, FASTTRAK SX4300 user manual RAID 50 Striping of Distributed Parity logical drives

Contents

SX4300, SX8300 Recommendations CopyrightTrademarks Important data protection informationMay cause undesired operation Radio Frequency Interference StatementPage Contents Support Troubleshooting & TipsAbout This Manual IntroductionHot-Swapping Product OverviewXOR Acceleration WebPAM Management Software Page SX8300 InstallationSX4300 Installing the FastTrak Card RAID Jbod Installing the Disk DrivesLED Pins Create a Logical Drive Page Installation Page FastBuild Utility FastTrak BiosMain Menu View Drive Assignments Create a Logical Drive One Logical Drive Two Logical Drives FastBuild Utility View Drive Assignments, Split Disk Drives Delete Logical Drive Controller Configuration System Resources Logical Drive ProblemsHalt On Error Page RAID 0 and Jbod Page Installing Software Drivers Windows Server Install Driver During New OS InstallationInstall Driver in an Existing System Windows XP Confirm InstallationInstall Driver in an Existing System Windows Red Hat Linux 8.0, 9.0, EL 3.0, EL SuSE Linux 9.1, 9.2, ES Install Driver During New OS Installation Single ProcessorInstall Driver During New OS Installation Multi-Processor Install Driver in an Existing System Introduction to RAID Adapter BiosConcepts About FastTrakRAID 0 Stripe interleaves data across multiple drives RAID 0 StripeRAID 1 Mirrors identical data to two drives RAID 1 MirrorRAID 5 Stripes all drives with data and parity information RAID 5 Block Striping with Distributed ParityRAID 10 Mirror / Stripe CH1 CH2 CH3 CH4 About Dual Data RedundancyRAID 50 Striping of Distributed Parity logical drives RAID 50 Striping of Distributed ParityAdvantages Disadvantages Choosing a RAID LevelJbod Single Drive Implemented as a mirrored logical drive Stripe Block Size Other Logical Drive FeaturesHot Spare Drive Gigabyte BoundaryInitialization Fast Init Logical Drive Expansion Cache SettingsAdd Lose RAID Level MigrationLevel Current Number Possible Number Drives From Increase Redundancy CapacityRanges of Disk Array Expansion Current LD Size Maximum LD Sector Size Expansion Size Page Motherboard Issues Troubleshooting & TipsDrive-Related Errors System Cmos IssuesDrive cannot be formed into an logical drive Operating System-Related IssuesPromise Windows driver does not appear in Device Manager Performance TipsSupport Frequently Asked QuestionsPre-Installation Speed, Device Types, Capacity, Cabling How can I change the resources that the FastTrak uses? Drive IssuesOther array configurations will not work for this purpose Post-Installation Installation Issues Capacity, BootingUnited States Technical Support ServicesContact Technical Support Italy Europe, Africa, Middle EastGermany China Limited WarrantyTaiwan Disclaimer of other warranties Your Responsibilities Return Product For RepairOr retailer