Maxtor 300 manual Glossary

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Glossary

BPI – Abbreviation for bits per inch. A measure of how densely information is packed on a storage medium. Flux changes per inch is also a term commonly used in describing storage density on a magnetic surface.

BUFFER – An area of RAM reserved for temporary storage of data that is waiting to be sent to a device that is not yet ready to receive it. The data is usually on its way to or from the disk drive or some other peripheral device.

BUS – The part of a chip, circuit board, or interface designed to send and receive data.

BYTE – The basic unit of computer memory, large enough to hold one character of alphanumeric data. Comprised of eight bits. See also bit.

C

CACHE Random-access memory used as a buffer between the CPU and a hard disk. Information more likely to be read or changed is placed in the cache, where it can be accessed more quickly to speed up general data flow.

CAPACITY – The amount of information that can be stored on a disk drive. The data is stored in bytes, and capacity is usually expressed in megabytes.

CDB – Command Descriptor Block. The SCSI structure used to communicate requests from an initiator (system) to a target (drive).

CLEAN ROOM – An environmentally controlled dust-free assembly or repair facility in which hard disk drives are assembled or can be opened for internal servicing.

CLUSTER – A group of sectors on a disk drive that is addressed as one logical unit by the operating system.

CONTROLLER – Short form of disk controller. The chip or complete circuit that translates computer data and commands into a form suitable for use by the disk drive.

CONTROLLER CARD – An adapter holding the control electronics for one or more hard disks, usually installed in a slot in the computer.

CPU – Acronym for Central Processing Unit. The microprocessor chip that performs the bulk of data processing in a computer.

CRC – Acronym for Cyclic Redundancy Check. An error detection code that is recorded within each sector and is used to see whether parts of a string of data are missing or erroneous.

CYLINDER – On a disk drive that has more than one recording surface and heads that move to various tracks, the group of all tracks located at a given head position. The number of cylinders times the number of heads equals the number of tracks per drive.

D

DATA SEPARATOR – On a disk drive that stores data and timing information in an encoded form, the circuit that extracts the data from the combined data and clock signal.

DEDICATED SERVO – A surface separate from the surface used for data that contains only disk timing and positioning information and contains no data.

DEFECT MANAGEMENT – A method that is implemented to ensure long term data integrity. Defect management eliminates the need for user defect maps. This is accomplished by scanning the disk drives at the factory for defective sectors. Defective sectors are deallocated prior to shipment. In addition, during regular use, the drive continues to scan and compensate for any new defective sectors on the disk.

DISK – In general, any circular-shaped data-storage medium that stores data on the flat surface of the platter. The most common type of disk is the magnetic disk, which stores data as magnetic patterns in a metal or metal-oxide coating. Magnetic disks come in two forms: floppy and hard. Optical recording is a newer disk technology that gives higher capacity storage but at slower access times.

G-2 Quickview 300 80/100/120/160/200/250/300GB PATA

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Contents MaxtorQuickview 80/100/120/160/200/250/300GB Pata Patents Publication Number Part Number Before You Begin McCarthy Blvd Milpitas, California Tel Fax Chapter InstallationChapter Introduction General DescriptionProduct Specifications ATA BUS Interface and ATA CommandsService and Support Appendix a Breaking the 137 Gigabyte Storage BarrierList of Figures List of Tables Products Maxtor CorporationAudience SupportManual Organization Terminology and ConventionsMSB References KEY Features Product OverviewGeneral Description Regulatory Compliance Standards Product EMI/EMS QualificationsInstallation Space RequirementsUnpacking Instructions 2Quickview 300 20-Pack Shipping Container Pata Interface Connector Hardware Options1AT Jumper Options Cable Select CS JumperMaster Jumper Configuration Drive Select DS JumperPower On Standby Cylinder Limitation Jumper CLJ4AT Connector and Jumper Location Pata BUS Adapter Combination Connector J12.1 40-Pin Pata Bus Connector Adapter Board5J1 DC Power and Pata Bus Combination Connector DC Power J1, Section a Pata Bus Interface Connector J1, Section CExternal Drive Activity LED Mounting Orientation Installation Ventilation Adapter Board InstallationClearance For Systems With a Motherboard Pata AdapterConnecting the Adapter Board and the Drive 8Drive Power Supply and Pata Bus Interface CablesTechniques in Drive Configuration Operating system limitationsDrive Configuration Models and CapacitiesPerformance Specifications Physical Dimensions Parameter ValuePower Requirements for 80/100/120/160/200GB Typical Power Requirements for 250GB/300GB TypicalVoltage Tolerance Power Mode Definitions EPA Energy Star ComplianceEnvironmental Limits Acoustic Noise11Baseplate Tempurature Measurement Location Shock and Vibration Parameter Operating NON-OPERATINGStart/Stop Cycles Reliability SpecificationsAnnualized Return Rate Data ReliabilitySafety Regulatory Compliance Canadian Emissions StatementMechanical Interface Signal Cable and ConnectorIntroduction Electrical InterfaceSupported Commands Command InterfaceGeneral Feature Set Command Feature Register Code ValuesFlush Cache SET Multiple Mode Write Sectors 30hContent Description Word10-19 Serial number 20 Ascii characters 20-21 Retired Content Description Minimum PIO transfer cycle time without flow control Minor version number See Address Offset Reserved Area Boot, Incits TR272001 = release interrupt enabled Supported Content Description Reserved 255 Integrity word 15-8 Checksum Signature Service and Support Product Support/Technical Assistance/Customer ServiceBreaking the 137 Gigabyte Storage Barrier HistoryDOS Solving the 137 Gigabyte Capacity Barrier How is the Extension Implemented?What Do the Drives Need to Meet the Spec? What is the Next Barrier? What Else is Involved?Appendix a Appendix B Big Numbers Appendix CGlossary Glossary FCI Acronym for flux changes per inch. See also BPI Initialize See low level formatting Millisecond ms One thousandth of a second .001 sec Glossary Quickview 300 80/100/120/160/200/250/300GB Pata G-7 Glossary Index