Adaptec ATA II 1420SA, ATA II 1220SA, ATA II 1430SA manual Understanding RAID

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Understanding RAID

A

In this chapter...
RAID Technology Overview	48
RAID 0 (Non-RAID Arrays)	49
RAID 1 Arrays	50
RAID 10 Arrays	50

When you create arrays (or logical drives), you can assign a RAID level to protect your data.

Each RAID level offers a unique combination of performance and redundancy. RAID levels also vary by the number of disk drives they support.

This appendix describes the RAID levels supported by your HostRAID controller, and provides a basic overview of each to help you select the best level of protection for your data storage.

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Contents Serial ATA II 1430SA, 1420SA, 1220SA HostRAID Controllers Copyright Adaptec Customer Support Limited 3-Year Hardware Warranty Regulatory Compliance Statements Contents Installing the HostRAID Controller Disk Drives Understanding Adaptec Storage Manager Safety Information About This Guide Terminology Used in this Guide How to Find More InformationWhat You Need to Know Before You Begin About Your HostRAID Controller Upgrading the HostRAID Controller Firmware HostRAID Controller FeaturesArray Level Features About the Adaptec 1430SA Controller About the Adaptec 1420SA Controller About the Adaptec 1220SA Controller Kit Contents System Requirements System Requirements Kit ContentsGetting Started Disk Drives for Your Controller Choosing a RAID LevelSelecting Disk Drives Selecting CablesInstalling on an Existing Operating System Installation OptionsBasic Installation Steps Installing with an Operating SystemInstalling the HostRAID Controller Disk Drives Before You Begin Installing the HostRAID ControllerNext Steps Connecting Disk Drives to Sata HostRAID ControllersDetermining the Boot Controller Checking Your Controller and DevicesCreating a Bootable Array Creating an Array with the ACU Setting the Boot ControllerCreating an Array Creating an Array with Adaptec Storage Manager Select Express configuration..., then click NextMaking Your Array Bootable Installing the Driver An Operating System Creating a Driver Disk Installing with WindowsInstalling with Suse Linux Installing with Red Hat LinuxInstalling with NetWare Installing the Driver on an Existing Operating System Installing on Windows Installing on NetWare Installing on Red Hat or Suse LinuxManaging Your Storage Space About Adaptec Storage Manager Installing Adaptec Storage ManagerAbout the Hrconf Command Line Utility Which Utility Should I Use? About the ARC UtilityAbout the AFU Understanding Adaptec Storage Manager Overview FeaturesLogical Devices View Changing How Drives are DisplayedPhysical Devices View Collapsed and Expanded Views Component Views Solving Problems Failed Disk Drive Protected by a Hot Spare Troubleshooting ChecklistRecovering from a Disk Drive Failure Multiple Failures in the Same Array Failed Disk Drive Not Protected by a Hot SpareFailure in Multiple Arrays Simultaneously Disk Drive Failure in a RAID 0 ArrayUnderstanding RAID Stripe-unit Size Selecting a RAID Level and Tuning PerformanceRAID Technology Overview Understanding Drive SegmentsRAID RAID 0 Non-RAID ArraysRAID 10 Arrays RAID 1 ArraysUsing the ARC Utility Creating a New Array Introduction to the ARC UtilityRunning the ARC Utility Creating and Managing ArraysRAID Rebuilding Arrays Managing ArraysForce from Offline Adding/Deleting Hotspares Managing Bootable Arrays and DevicesConfiguring Disk Drives Atapi Support Using SATASelectSmart SATASelect OptionsFormatting and Verifying Disk Drives Using the AFU for DOS Compatibility IntroductionSystem Requirements Running the AFU from the GUI Running the AFU from the Command LineSave Update Command Switches AFU Command Line Step-by-StepAfu update /C controllernumber Electrostatic Discharge ESD Safety InformationTechnical Specifications Current Requirements Environmental SpecificationsDC Power Requirements Glossary See channel Initialize See configure Mirrored array/mirroring See RAID 1, RAID Area on each disk reserved for use by the RAID controller See simple volume, spanned volume Index Scsi Adaptec, Inc