Adaptec ATA II 1420SA, ATA II 1220SA Area on each disk reserved for use by the RAID controller

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Glossary ● 92

R

RAID

Redundant Array of Independent Disks (alternative definition Redundant Array of Inexpensive Disks).

RAID 0

A single-level array consisting of two or more equal-sized segments residing on different disks. RAID 0 distributes data evenly across its respective drives in equal-sized sections called stripes. RAID 0 arrays are not redundant.

RAID 1

Single-level array consisting of two equal segments residing on two different drives. Provides redundancy by storing identical copies on two drives. See mirrored array/mirroring.

RAID 10

Spanned array consisting of two or more equal-sized RAID 1 arrays. Provides redundancy by striping and mirroring. Mirroring provides data protection, and striping improves performance. See mirrored array/ mirroring, RAID 0.

RAID signature

The area on each disk reserved for use by the RAID controller.

RAID volume

Concatenates two or more arrays of the same type.

rebuild

Background regeneration of redundant data on a RAID 1.

redundant

The ability of an array to maintain operability when one or more hardware failures occur. RAID 1 is redundant. In the event of a drive failure, redundant arrays can be restored to normal operation by replacing the failed drive and rebuilding the array.

rescan

Process of updating the current screen to show all currently available resources.

S

Serial ATA (SATA)

A successor to ATA that uses a serial, instead of parallel, interface.

simple volume

A volume made up of disk space from a single disk. It can consist of a single region on a disk, or concatenated multiple regions of the same disk.

single-level array

Array created from one or more segments. See volume, spanned volume, RAID 0, RAID 1, RAID 10.

snapshot

Instantaneous read-only copy of an array at a precise point in time.

spanned volume

A simple volume that spans two or more drives.

stripe

Contiguous set of data distributed across all the disks in an array. A striped array distributes data evenly across all members in equal-sized sections called stripes.

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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 Kit Contents System RequirementsGetting Started Selecting Cables Choosing a RAID LevelSelecting Disk Drives Disk Drives for Your ControllerInstalling with an Operating System Installation OptionsBasic Installation Steps Installing on an Existing Operating SystemInstalling the HostRAID Controller Disk Drives Installing the HostRAID Controller Before You BeginChecking Your Controller and Devices Connecting Disk Drives to Sata HostRAID ControllersDetermining the Boot Controller Next StepsCreating a Bootable Array Creating an Array with the ACU Setting the Boot ControllerCreating an Array Select Express configuration..., then click Next Creating an Array with Adaptec Storage ManagerMaking Your Array Bootable Installing the Driver An Operating System Installing with Windows Creating a Driver DiskInstalling with Red Hat Linux Installing with Suse LinuxInstalling with NetWare Installing the Driver on an Existing Operating System Installing on Windows Installing on Red Hat or Suse Linux Installing on NetWareManaging 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 Features OverviewLogical 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 Disk Drive Failure in a RAID 0 Array Failed Disk Drive Not Protected by a Hot SpareFailure in Multiple Arrays Simultaneously Multiple Failures in the Same ArrayUnderstanding RAID Understanding Drive Segments Selecting a RAID Level and Tuning PerformanceRAID Technology Overview Stripe-unit SizeRAID 0 Non-RAID Arrays RAIDRAID 1 Arrays RAID 10 ArraysUsing the ARC Utility Creating and Managing Arrays Introduction to the ARC UtilityRunning the ARC Utility Creating a New ArrayRAID Managing Arrays Rebuilding ArraysForce from Offline Adding/Deleting Hotspares Managing Bootable Arrays and DevicesConfiguring Disk Drives Using SATASelect Atapi SupportSATASelect Options SmartFormatting and Verifying Disk Drives Using the AFU for DOS Compatibility IntroductionSystem Requirements Running the AFU from the Command Line Running the AFU from the GUISave Update AFU Command Line Step-by-Step Command SwitchesAfu update /C controllernumber Safety Information Electrostatic Discharge ESDTechnical 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