Maxtor Computer Drive manual Transfer Rate The rate at which

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GLOSSARY

SCSI – Acronym for Small Computer System Interface, an American National Standards Institute (ANSI) version of Shugart Associates' SASI interface between the computer and controller. SCSI has grown in popularity and is one of the most flexible and intelligent interfaces available.

SECTOR – A section of space along a track on the disk, or the data that is stored in that section. Hard disks most often have sectors that are 512 data bytes long plus several bytes overhead for error correcting codes. Each sector is preceded by ID data known as a header, which cannot be overwritten.

SEEK – A movement of the disk read/write head in or out to a specific track.

SERVO DATA – Magnetic markings written on the media that guide the read/write heads to the proper position.

SERVO SURFACE – A separate surface containing only positioning and disk timing information but no data.

SETTLE TIME – The interval between when a track to track movement of the head stops, and when the residual vibration and movement dies down to a level sufficient for reliable reading or writing.

SHOCK RATING – A rating (expressed in Gs) of how much shock a disk drive can sustain without damage.

SOFT ERROR – An error in reading data from the disk that does not recur if the same data is reread. Often caused by power fluctuations or noise spikes.

SOFT SECTORED – Disks that mark the beginning of each sector of data within a track by a magnetic pattern.

SPINDLE – The center shaft of the disk upon which the drive’s platters are mounted.

SPUTTER – A type of coating process used to apply the magnetic coating to some high-performance disks. In sputtering, the disks are placed in a vacuum chamber and the

coating is vaporized and deposited on the disks. The resulting surface is hard, smooth, and capable of storing data at high density. Maxtor disk drives use sputtered thin film disks.

SOF - Start Of Frame

STEPPER – A type of motor that moves in discrete amounts for each input electrical pulse. Stepper motors used to be widely used for read/write head positioner, since they can be geared to move the head one track per step. Stepper motors are not as fast or reliable as the rotary voice coil actuators which Maxtor disk drives use.

SUBSTRATE – The material the disk platter is made of beneath the magnetic coating. Hard disks are generally made of aluminum or magnesium alloy (or glass, for optical disks) while the substrate of floppies is usually mylar.

SURFACE – The top or bottom side of the platter which is coated with the magnetic material for recording data. On some drives one surface may be reserved for positioning information.

T

THIN FILM – A type of coating, used for disk surfaces. Thin film surfaces allow more bits to be stored per disk.

TPI – Acronym for tracks per inch. The number of tracks or cylinders that are written in each inch of travel across the surface of a disk.

TRACK – One of the many concentric magnetic circle patterns written on a disk surface as a guide to where to store and read the data.

TRACK DENSITY – How closely the tracks are packed on a disk surface. The number is specified as tracks per inch (TPI).

TRACK TO TRACK SEEK TIME – The time required for the read/write heads to move to an adjacent track.

TRANSFER RATE – The rate at which the

Maxtor DiamondMax 8S 40GB SATA G-7

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Contents May 13 Revision Part Number DiamondMax 8S 40GB Serial ATA Product ManualPatents UL/CSA/VDE/TUV /RoHSClause at Dfars 252.227-7013 and FAR McCarthy Blvd Milpitas, California Tel Fax Table of Contents Service and Support InstallationSata BUS Interface and ATA Commands Single Pack Shipping Container List of FiguresList of Tables Sata Pin 11 ConfigurationAudience Maxtor CorporationManual Organization ProductsSata Terminology and ConventionsSOF ReferenceMaxtor DiamondMax 8S 40GB Sata Product Description Serial ATA Interface KEY FeaturesVersatility PerformanceReliability Product EMI/EMS Qualifications Regulatory Compliance StandardsHardware Requirements Models and Capacities Product SpecificationsDrive Configuration 40GB Performance SpecificationsPhysical Dimensions Power Mode Definitions Power RequirementsEnvironmental Limits EPA Energy Star ComplianceTrack Following At SpeedParameter Operating NON-OPERATING Shock and VibrationCanadian Emissions Statement Reliability SpecificationsRoHS Compliance Safety Regulatory ComplianceSpace Requirements Installation2Single Pack Shipping Container Unpacking Instructions325 Pack Shipping Container Staggered Spin-up Hardware OptionsJumper Position 4DiamondMax 8S 40GB Sata Power/Interface Connector SATA-P11 Orientation Mounting6Mounting Dimensions and Clearance External Drive Activity LED Sata Bus Interface ConnectorVentilation For Systems with AN ADD-IN Sata Adapter Board Connecting the Adapter Board and the Drive2Device Plug Connector Pin Definitions 7Drive Power Supply and Sata Bus Interface Cables 8Completing the Drive Installation Command Interface Sata BUS Interface and ATA CommandsMechanical Interface Register Address DecodingCommand Feature Register Code Values Supported CommandsCommand Feature Register Code Values DBh Write Mulitple EXT Word Content Description Word Content Description Word Content Description Minimum Multiword DMA transfer cycle time per word ATA Bus Interface and ATA Commands Word Content Description Word Content Description Word Content Description Word Content Description Word Content Description Word Content Description = Ultra DMA mode 6 is selected Word Content Description ATA Bus Interface and ATA Commands Word Content Description Word Content Description Product Support Service and SupportWarranty Services Glossary Maxtor DiamondMax 8S 40GB Sata G-2 FCI Acronym for flux changes per inch. See also BPI Kilobyte kB a unit of measure consisting of 1,024 210 bytes Initialize See low level formattingMillisecond ms One thousandth of a second .001 sec MB See megabyteMaxtor DiamondMax 8S 40GB Sata G-6 Transfer Rate The rate at which Maxtor DiamondMax 8S 40GB Sata G-8 Clearance 4-6,4-7,4-8
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