MicroNet Technology 5 manual Understanding RAID

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2-Understanding RAID

Chapter 2. Understanding RAID

The RAIDBank5 controller subsystem is a high-performance SATA2 drive bus disk array controller. When properly configured, the RAIDBank5 can provide non-stop service with a high degree of fault tolerance through the use of RAID technology and advanced array management features.

The RAIDBank5 can be configured to RAID levels 0, 1, 10, 3, and 5, as well as disk spans and direct mapping. RAID levels other than 0 are able to tolerate a hard disk failure without impact on the existing data, and failed drive data can be reconstructed from the remaining data and parity drives. RAID configuration and monitoring is accessible through the LCD front control panel or the built in web administration interface. The RAIDBank5 features the following high availability functions:

RAID Levels 0,1,10,3,5, disk spans, and direct mapping Support

Up to 4 discrete LUN support

• Online Capacity Expansion

FYI:

The Berkeley RAID levels are a family of

• Online RAID Level Migration

disk array data protection and mapping

• Logical Drive Capacity Extension

techniques described by Garth Gibson, Randy Katz,

• Array Roaming

and David Patterson in papers written while they

• Automatic Drive Failure Detection

were performing research into I/O subsystems at

• Automatic Failed Drive Rebuilding

the University of California at Berkeley. There are

• Hot Spare Disk Drives

six Berkeley RAID Levels, usually referred to by the

names RAID Level 1, etc., through RAID Level 6.

• Instant Availability/Background Initialization.

 

 

This section will help you gain understanding of how these functions can serve your needs best.

RAID

RAID is an acronym for Redundant Array of Independent Disks. It is an array of multiple independent hard disk drives that provide high performance and fault tolerance through support of several levels of the Berkeley RAID techniques. An appropriate RAID level is selected when the volume sets are defined or created, and is based on disk capacity, data availability (fault tolerance or redundancy), and disk performance considerations. The RAIDBank5 controller makes the RAID implementation and the disks’ physical configuration transparent to the host operating system, which means that the host operating system drivers and software utilities are not affected regardless of the RAID level selected.

RAIDBank5 Owner’s Manual

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Contents Owner’s Guide Welcome Welcome From MicroNet TechnologyTable of Contents Table of Contents Warranty Two Year Limited WarrantyLimitations of Liability Technical Support Policy Returning MaterialsGetting Started Features and BenefitsGetting Started System Requirements and CompatibilityChoosing a location for your RAIDBank5 Installing the Fan ModuleWhat’s Included Getting Started Hot plug Drive Replacement Communication and ControlConnecting the RAIDBank5 FireWire 400 ConnectRAID System Management Controls Installing the Included host bus adapterConfiguration via RAID Mode Selector Switch Using the front panel touch-control keypad Using the RAID management ApplicationUnderstanding RAID Understanding RAIDRAID 0 Striping RAID 10 Striped Mirror Direct Mapping RAID Control-LCD Access ProcedureQuick Volume/RAID Setup RAID Controls- LCD InterfaceDisk Management RAID Function Control System Functions RAID Manager Software InstallationRAID Manager Software IntroductionBasic Mode Event LogConsiderations for RAID Volume Creation Advanced Mode Remote NotificationRAID Manager Software Firmware RAID Standby and Rebuild PriorityEncryption Management The RAIDBank5 RAID subsystem RAID Manager Software Volume Setup on Apple Macintosh Host Computer SetupHost Computer Setup Volume Setup on Microsoft Windows 2000/XP/2003 Volume Setup on Microsoft Windows Vista/7/2008 Optimizing Windows Caching Algorithm How to safely dismount- MacHow to safely dismount- Windows Safe DismountingGeneral Use Precautions TroubleshootingTroubleshooting Daily Use TipsMacintosh related FAQ Frequently Asked QuestionsGeneral FAQ Windows related FAQ Troubleshooting Appendix A- Getting Help How To Contact MicroNet Technology, IncGetting Help RAID Level Comparison Table Appendix B RAID Level Comparison TableGlossary Appendix C- GlossaryGlossary Glossary Glossary Glossary Glossary Glossary Product Specifications Appendix D Product SpecificationsRadio Frequency Interference Statement FCC Compliance StatementFederal Communications Commission MicroNet Techology Manhattan Place Torrance, CA