Definition of hard disk drive

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Definition of hard disk driveHard Disk Drive (HDD) is a “Computer Data Storage Device” used for storing and retrieving digital information using rapidly rotating disks (platters) coated with magnetic material. A Hard Disk Drive (HDD) can Store its “Computer Data” even when powered off. You can Save any Documents in your Computer Hard Disk Drive (HDD). Without Hard Disk Drive (HDD), you can Save any Documents in your Computer. Hard Disk Drive (HDD) capacity is varying to its “Memory Space” to Save Computer Documents in your Computer. You should know Characteristics of Hard Disk Drive (HDD) in your Computer.

Characteristics of hard disk drive

 

Definition of hard disk drive

a. Capacity of hard disk

Computer Hard Disk Drive (HDD) space depends on the capacity of your Computer Hard Disk Drive (HDD). Usually, you can get 3.75 megabytes to 4 terabytes Hard Disk Drive (HDD) to use in your Computer.

b. Physical volume of hard disk

Computer Hard Disk Drive (HDD) “Physical Volume” is decreasing from 68 cubic feet (comparable to a large side by side refrigerator) to less than 20 milliliters (0.70 imp fl oz; 0.68 US fl oz) for your Computer.

c. Weight of hard disk

Computer Hard Disk Drive (HDD) “Weight” is decreasing from 2,000 pounds (910 kg) to 48 grams (1.7 oz) for your Computer.

d. Decreasing average access time

Computer Hard Disk Drive (HDD) “Average Access Time” is decreasing from over 100 milliseconds to a few milliseconds which is a greater than 40 to 1 improvement for your Computer.

e. Internal hard disk drive of cpu casing box

Computer Hard Disk Drive (HDD) is staying in your Computer CPU Casing Box. You can use more than one Computer Hard Disk Drive (HDD) in your Computer CPU Casing Box at a time for your Computer.

f. Data storing to external hard disk drive

Definition of hard disk drive

You can also store your important Data to the External Hard Disk Drive of your Computer. You can keep the External Hard Disk Drive to the outside of CPU Casing Box. Usually, External Hard Disk Drive sizes are 2.5 inch and 3.5 inch for your Computer. The External Hard Disk Drive common sizes are 160 GB, 250 GB, 320 GB, 500 GB, 640 GB, 750 GB, 1 TB, 2 TB, 3 TB and 4 TB.

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g. Magnetic recording of hard disk drive

Definition of hard disk drive

Computer Hard Disk Drive (HDD) records data by magnetizing a slim film of ferromagnetic material on a disk. In order changes in the direction of magnetization stand for “Binary Data Bits”. The “Computer Data” is read from the disk by detecting the transitions in magnetization.

h. Components of hard disk drive

Usually, Computer Hard Disk Drive (HDD) has two electric motors; a spindle motor that spins the disks and an actuator motor that positions the read/ write head gathering across the spinning disks.

i. File system use

Old version Computer Hard Disk Drive (HDD) was PATA Drive. The Modern Computer Hard Disk Drive (HDD) is SATA Drive. SATA Drive appear at their interfaces as a nearby set of logical blocks, typically 512 bytes long but the industry is in the process of changing to 4,096 bytes logical blocks. The “Data Structures” stored on Disk to retrieve files include the File Allocation Table (FAT) in the MS-DOS file system. NTFS (New Technology File System) is a proprietary file system which is developed by Microsoft. Starting with “Windows NT 3.1”, it is the default file system of Windows NT family.

j. Form factors

Computer Hard Disk Drive (HDD) can be different sizes such as 0.85 inch, 1 inch, 1.8 inch, 2.5 inch, 3.5 inch, 5.25 inch and 8 inch of your Computer.

k. Time to access data

The factors that limit the time to access the data on a Computer Hard Disk Drive (HDD) are mostly related to the mechanical nature of the rotating disks and moving heads.

l. Time to access data

A typical 7,200 rpm Desktop HDD has a sustained “Disk to Buffer” Data Transfer Rate up to 1,030 Mbits/sec. This rate depends on the track location; the rate is higher for data on the outer tracks and lower toward the inner tracks and is generally a bit higher for 10,000 rpm drives.

In this way, you can understand about Definition of Hard Disk Drive and its Characteristics for your Computer.

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