This document defines and describes different types of hard disks. It explains that a hard disk uses magnetic platters coated with a material to store information, which spin at high speeds. The platters are arranged on a spindle and read and written to by electromagnetic heads. Different interface types are then outlined, including ATA/EIDE which connects directly to the computer, SCSI which provides better performance but is more expensive, RAID which offers high performance and reliability, and SATA which uses a serial cable allowing for faster data transmission speeds than parallel interfaces.

1. The Definition of Harddisk
Hard disk is medium data storage on a computer that consists of a collection of
magnetic hard disks and spinning, as well as other electronic components. Hard disks use a
flat disc called the platter, which on both sides are coated with a material that is designed to
be able to store information magnetically. Platter-platter by punching holes in the center are
arranged and rearranged on a spindle. Platter spinning at very high speed which is controlled
by the spindle motor that is connected to the spindle. Special literacy electromagnetic tool
named head mounted on a slider and is used to store information in a disk or read. Slider
mounted on the arm, all of which are connected mechanically to a single collection on the
surface of the disc and is connected via a device called the actuator. There was also the logic
board to regulate the activity of other components and communicates with the PC.
ATA / EIDE. EIDE hard disk (Enhanced Integrated Drive Electronics) or ATA
(Advanced Technology Attachment) is the latest version of a stAndard disk interface suitable
for connection to the bus. Many manufacturers have a range of disk with a disk interface
EIDE / ATA disk can be connected directly to the PCI bus and roomates which is used in
many PC (personal computer).
SCSI. Many disks have interfaces designed for connection to a standard SCSI bus.
The disks tend to be more expensive, but have better performance which is possible due to
excess SCSI bus than the PCI bus. Access to the same can be done for many disk drives as
the drive interface is actively connected to the SCSI bus only when the drive is ready to
transfer data. This is especially useful in applications where there are a large number of
requests for small files, which often happens in a computer used as a file server.
RAID. Promises great performance and provides a large and reliable storage. Disk is
used both in high-performance computer and in systems that require dramatically higher
reliability than normal levels. However, with the decline in prices to a more affordable level,
the disk becomes more attractive even for a computer system with size – average.
SATA. SATA hard disk of the type (Serial Advanced Technology Attachment), the
disk interface ATA (Advanced Technology Attachment) by using the serial version of the
thin cable that has small wires. Total about two-thirds of total hard drive cable with type
EIDE or ATA disks are numbered 39 pins and SATA has very high speed data transmission
and reducing latency. So, this serial bus is able to exceed the speed of parallel bus.
Sumber : http://www.caramudahbelajarbahasainggris.net/2013/04/7-contoh-
artikel-bahasa-inggris-dengan-topik-berbeda.html