Dell S100, S300 manual Glossary, 103

Page 103

Glossary

A D A P T E R An adapter enables the system to access peripheral devices by converting the protocol of one bus or interface to another. An adapter may also provide specialized function. For example, a RAID controller is a type of adapter that provides RAID functions. Adapters may reside on the system board or be an add-in card. Other examples of adapters include network and SCSI adapters.

A H C I — A programming specification which defines the operation of Serial ATA host controllers (also known as host bus adapters) in a non-implementation-specific manner. The specification describes a system memory structure for computer hardware vendors to exchange data between host system memory and attached storage-devices.

ATA (A D V A N C E D TE C H N O L O G Y A T T A C H M E N T ) — A standard interface for connecting a system’s storage devices, such as CD-ROMs and hard-drives.

ATAPI (ATA P A C K E T I N T E R F A C E ) — An interface standard that defines the packet protocol between a system and its internal storage peripherals, such as CD-ROM, DVD, or tape drives. ATAPI provides the command set for controlling the devices via an IDE interface.

B A C K G R O U N D I N I T I A L I Z A T I O N Background initialization is the automatic check for media errors on physical disks. It ensures that striped data segments are the same on all physical disks in a virtual disk. The difference between a background initialization and a consistency check is that a background initialization is automatic for new virtual disks. The operation starts automatically after you create the disk.

BAS (B A C K G R O U N D A R R A Y S C A N ) — Background Array Scan is a background operation which gets executed every 100msec. that verifies and corrects the mirror, volume or parity data for virtual disks. BAS starts automatically after a Virtual Disk is created.

BIOS (B A S I C I N P U T /O U T P U T S YS T E M ) C O N F I G U R A T I O N U T I L I T Y An alternate name for the PERC Virtual Disk Management utility. The utility appears during system startup when <Ctrl><R> are pressed.

C A C H E Fast memory that holds recently accessed data. Using cache speeds subsequent access to the same data. It is most often applied to processor-memory access but also can be used to store a copy of data accessible over a network. When data is read from or written to main memory, a copy is also saved in cache memory with the associated main memory address. The cache memory software monitors the addresses of subsequent reads to see if the required data is already stored in cache memory. If it is already in cache memory (a cache hit), it is read from cache memory

Glossary

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Contents User’s Guide February Contents Physical Disk-Related Errors Installing the Perc S300 AdapterComplete the Hardware Installation Installing the Microsoft Windows DriversIndustry Canada Notice Canada Only RAID Technology Understanding Disk ArraysContents Page Safety When Working Inside Your System Safety GeneralProtecting Against Electrostatic Discharge Page Introduction OverviewOverview Supported Platforms Physical disks RequirementsOverview Boot to it Summary of RAID Levels About RAIDDisk Striping RAID TerminologyDisk Mirroring Parity Data Spanned RAID LevelsExample of Distributed Parity RAID General Features FeaturesDescription Description Allows hot-swapping Physical disks, in the same virtual disk That supports hot-swapping DisksBackplane with hot-swap capability Features Migration during an OCE Virtual diskSpecifications RAID Before You Begin Hardware InstallationGeneral Considerations Installing the Perc S300 Adapter Installing a Perc S300 Adapter Connecting the Cables Connect Physical Disks to the Perc S300 Adapter Complete the Hardware InstallationHardware Installation Installing the Microsoft Windows Drivers Installing the DriversDownloading the Controller Driver Media Operating System And Device Driver Media Pre-Installation Requirements for the Controller DriversTo Use Sata Controller to either ATA Mode or Ahci Pre-Installation Procedures For The Controller Drivers Steps DVD, and so on, perform the following For Microsoft Windows Server 2008 and Windows Server 2008 R2 For Microsoft Windows Server For Microsoft Windows Server 2008 and Windows Server 2008 R2 Installing the Drivers Installing the Drivers Perc Virtual Disk Management Utility Operations Description RAID Configuration ManagementAccessing the Perc Virtual Disk Management Utility Perc Virtual Disk Management Text Colors Description Initializing Physical Disks Before You Begin Creating Virtual DisksRAID Configuration and Management Deleting Virtual Disks RAID Configuration and Management Swapping Two Virtual Disks Create a Global Hot Spare Managing Global Hot SparesDelete a Global Hot Spare Viewing Virtual Disk Details Viewing Physical Disk DetailsRescanning Disks Controller Options Description How to OperateController Options Pause if Degraded Continuing to BootRAID Configuration and Management System Startup Problems TroubleshootingRAID Mode to ATA Mode Boot Mode, Boot Sequence Bios Bios Screen Corrective Action Lost This warning message appears when multiple virtual disks are This warning message appears when From virtual disk creation Virtual Disk-Related Errors A Virtual Disk is in a Failed State On the virtual diskRedundant virtual disk 12. Cannot Create a Global Hot Spare Select View Virtual Disk Details 14. a Dedicated Hot Spare Fails Physical Disk-Related ErrorsTroubleshooting S300 adapter Controller SpecificationsAppendix a Read, Write, and Cache PolicyPerc S300 adapter Controller TasksPhysical Disk Tasks Table A-3. Physical Disk Tasks Physical Disk Task NameAdapter Virtual Disk TasksSupported RAID Levels Table A-4. Virtual Disk Tasks Virtual Disk Task NameVirtual Disk Specifications RAID Technology Understanding Disk Arrays and Virtual Disks Appendix BUnderstanding RAID Levels Appendix B Table B-2. Physical Disk States Definition Disk States Virtual and Physical DisksTable B-3. Virtual Disk States State Definition Failure StatesPhysical Disk States Table B-5. Minimum and Maximum Physical Disk ConfigurationsCreating Virtual Disks Future Expansion Understanding Physical DisksRescanning Physical Disks for Changes in State Dedicated Hot SparesGlobal Hot Spares Regulatory Notices Appendix CFCC, Class a FCC Notice U.S. OnlyFCC, Class B Industry Canada, Class B Industry Canada Notice Canada OnlyCE Notice European Union Industry Canada, Class aAppendix C CE Mark Notice Contacting Dell Appendix DAppendix D Index Index Index 100 101 102 103 Glossary104 105 106 Acronym for nanoseconds, one billionth of a second 107108 109 110
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