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Hard disk drive performance characteristics

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Higher performance in hard disk drives comes from devices which have better performance characteristics. [1]

52 relations: A-weighting, Active hard-drive protection, Areal density (computer storage), Automatic acoustic management, CD-RW, Computer data storage, Concentric objects, Constant angular velocity, Constant linear velocity, Data transmission, Defragmentation, Digital video recorder, Disk buffer, Disk read-and-write head, Disk sector, Drum memory, DVD recordable, Electric energy consumption, Failure rate, File system fragmentation, Floppy disk, Fluid bearing, Gravitational acceleration, Green computing, Hard disk drive, Hewlett-Packard, Hybrid drive, Interleaving (disk storage), IOPS, Machine, Microsecond, Millisecond, Optical disc, Parallel ATA, Phonograph record, Power-up in standby, Quiet PC, Revolutions per minute, Rotation, Seagate Technology, Serial ATA, Solid-state drive, Spin-up, Spiral, Standard RAID levels, Stepper motor, Trim (computing), Voice coil, VRPM, Waste heat, ..., Western Digital, Write amplification. Expand index (2 more) »

A-weighting

A-weighting is the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level.

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Active hard-drive protection

In computer hardware, active hard-drive protection refers to technology that attempts to avoid or reduce mechanical damage to hard disk drives by preparing the disk prior to impact.

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Areal density (computer storage)

Areal density is a measure of the quantity of information bits that can be stored on a given length of track, area of surface, or in a given volume of a computer storage medium.

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Automatic acoustic management

Automatic acoustic management (AAM) is a method for reducing acoustic emanations in AT Attachment (ATA) mass storage devices for computer data storage, such as ATA hard disk drives and ATAPI optical disc drives.

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CD-RW

CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format.

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Computer data storage

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media that are used to retain digital data.

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Concentric objects

In geometry, two or more objects are said to be concentric, coaxal, or coaxial when they share the same center or axis.

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Constant angular velocity

In optical storage, constant angular velocity (CAV) is a qualifier for the rated speed of any disc containing information, and may also be applied to the writing speed of recordable discs.

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Constant linear velocity

In optical storage, constant linear velocity (CLV) is a qualifier for the rated speed of an optical disc drive, and may also be applied to the writing speed of recordable discs.

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Data transmission

Data transmission (also data communication or digital communications) is the transfer of data (a digital bitstream or a digitized analog signal) over a point-to-point or point-to-multipoint communication channel.

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Defragmentation

In the maintenance of file systems, defragmentation is a process that reduces the amount of fragmentation.

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Digital video recorder

A digital video recorder (DVR) is an electronic device that records video in a digital format to a disk drive, USB flash drive, SD memory card, SSD or other local or networked mass storage device.

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Disk buffer

In computer storage, disk buffer (often ambiguously called disk cache or cache buffer) is the embedded memory in a hard disk drive (HDD) acting as a buffer between the rest of the computer and the physical hard disk platter that is used for storage.

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Disk read-and-write head

Disk read/write heads are the small parts of a disk drive which move above the disk platter and transform the platter's magnetic field into electrical current (read the disk) or, vice versa, transform electrical current into magnetic field (write the disk).

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Disk sector

In computer disk storage, a sector is a subdivision of a track on a magnetic disk or optical disc.

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Drum memory

Drum memory was a magnetic data storage device invented by Gustav Tauschek in 1932 in Austria.

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DVD recordable

DVD recordable and DVD rewritable refer to part of optical disc recording technologies.

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Electric energy consumption

Electric energy consumption is the form of energy consumption that uses electric energy.

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Failure rate

Failure rate is the frequency with which an engineered system or component fails, expressed in failures per unit of time.

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File system fragmentation

In computing, file system fragmentation, sometimes called file system aging, is the tendency of a file system to lay out the contents of files non-continuously to allow in-place modification of their contents.

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Floppy disk

A floppy disk, also called a floppy, diskette, or just disk, is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles.

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Fluid bearing

Fluid bearings are bearings in which the load is supported by a thin layer of rapidly moving pressurized liquid or gas between the bearing surfaces.

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Gravitational acceleration

In physics, gravitational acceleration is the acceleration on an object caused by the force of gravitation.

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Green computing

Green computing, green ICT as per International Federation of Global & Green ICT "IFGICT", green IT, or ICT sustainability, is the study and practice of environmentally sustainable computing or IT.

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Hard disk drive

A hard disk drive (HDD), hard disk, hard drive or fixed disk is an electromechanical data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.

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Hewlett-Packard

The Hewlett-Packard Company (commonly referred to as HP) or shortened to Hewlett-Packard was an American multinational information technology company headquartered in Palo Alto, California.

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Hybrid drive

In computing, a hybrid drive (solid state hybrid drive – SSHD) is a logical or physical storage device that combines a faster storage medium such as solid-state drive (SSD) with a higher-capacity hard disk drive (HDD).

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Interleaving (disk storage)

In disk storage and drum memory, interleaving is a technique used to improve access performance to storage by putting data accessed sequentially into non-sequential sectors.

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IOPS

Input/output operations per second (IOPS, pronounced eye-ops) is an input/output performance measurement used to characterize computer storage devices like hard disk drives (HDD), solid state drives (SSD), and storage area networks (SAN).

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Machine

A machine uses power to apply forces and control movement to perform an intended action.

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Microsecond

A microsecond is an SI unit of time equal to one millionth (0.000001 or 10−6 or 1/1,000,000) of a second.

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Millisecond

A millisecond (from milli- and second; symbol: ms) is a thousandth (0.001 or 10−3 or 1/1000) of a second.

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Optical disc

In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc which encodes binary data (bits) in the form of pits (binary value of 0 or off, due to lack of reflection when read) and lands (binary value of 1 or on, due to a reflection when read) on a special material (often aluminium) on one of its flat surfaces.

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Parallel ATA

Parallel ATA (PATA), originally, is an interface standard for the connection of storage devices such as hard disk drives, floppy disk drives, and optical disc drives in computers.

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Phonograph record

A phonograph record (also known as a gramophone record, especially in British English, or record) is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove.

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Power-up in standby

Power-up in standby (PUIS) or power management 2 mode (PM2; Western Digital specific) is a SATA or Parallel ATA (aka PATA) hard disk configuration which prevents the drive from automatic spinup when power is applied.

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Quiet PC

A quiet PC is a personal computer that makes very little, or no noise.

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Revolutions per minute

Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min) is the number of turns in one minute.

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Rotation

A rotation is a circular movement of an object around a center (or point) of rotation.

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Seagate Technology

Seagate Technology PLC (commonly referred to as Seagate) is an American data storage company.

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Serial ATA

Serial ATA (SATA, abbreviated from Serial AT Attachment) is a computer bus interface that connects host bus adapters to mass storage devices such as hard disk drives, optical drives, and solid-state drives.

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Solid-state drive

A solid-state drive (SSD) is a solid-state storage device that uses integrated circuit assemblies as memory to store data persistently.

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Spin-up

Spin-up refers to the process of a hard disk drive or optical disc drive accelerating its platters or inserted optical disc from a stopped state to an operational speed.

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Spiral

In mathematics, a spiral is a curve which emanates from a point, moving farther away as it revolves around the point.

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Standard RAID levels

In computer storage, the standard RAID levels comprise a basic set of RAID (redundant array of independent disks) configurations that employ the techniques of striping, mirroring, or parity to create large reliable data stores from multiple general-purpose computer hard disk drives (HDDs).

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Stepper motor

A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps.

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Trim (computing)

A trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.

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Voice coil

A voice coil (consisting of a former, collar, and winding) is the coil of wire attached to the apex of a loudspeaker cone.

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VRPM

vRPM, or virtual Revolutions Per Minute, was a term for a synthetic measurement of performance introduced by SanDisk for solid state drive (SSD) storage devices inside client PCs.

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Waste heat

Waste heat is heat that is produced by a machine, or other process that uses energy, as a byproduct of doing work.

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Western Digital

Western Digital Corporation (abbreviated WDC, commonly shortened to Western Digital or WD) is an American computer data storage company and one of the largest computer hard disk drive manufacturers in the world, along with its main competitor Seagate Technology.

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Write amplification

Write amplification (WA) is an undesirable phenomenon associated with flash memory and solid-state drives (SSDs) where the actual amount of information physically written to the storage media is a multiple of the logical amount intended to be written.

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Redirects here:

Data transfer rate (disk drive), Disk access time, Disk drive performance characteristics, Disk seek, Disk-drive performance characteristics, Hard disk rotational latency, Rotational delay, Rotational latency, Seek delay, Seek time, Short stroking, Short-Stroking, Short-stroking, Throughput (disk drive).

References

[1] https://en.wikipedia.org/wiki/Hard_disk_drive_performance_characteristics

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