The hard disk is
one of the computer data storage media 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 is coated
with a material that is designed to be able to store information magnetically .
Platter - platter was prepared by punching holes in the center and arranged on
a spindle . Platter spins at very high speed which is controlled by the spindle
motor 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 upper arm , all of which are connected mechanically to a
single set and connected to the surface of the disc through a device called the
actuator . There was also the logic board regulating the activity of other
components and communicates with a PC .
Type Of Computer
Hard Drive
.jpg)
Disk ATA / EIDE ,
EIDE hard disk with the type (
Enhanced IntegratedDrive Electronic ) or type ATA ( Advanced Technology
Attachment ) is the latest version of a standard disk interface sesuaiuntuk
connection to the bus , Many manufacturers have a range diskdengan disk
interface EIDE / ATA disk such dapatdihubungkan directly to the PCI bus , which
is used in banyakPC (personal computer ) . Advantages EIDE drives / ATA
yangsignifikan is the price is quite cheap , karenapenggunaannya in the PC
market . One drawback utamanyaadalah required a separate controller for each
drive if two drivedigunakan concurrently to improve performance . One
satuprodusen famous chips already include templates to enable disk controller
EIDE / ATA connected directly kemotherboard .
Disk SCSI disks
have many interface designed for connection to a standard SCSI bus . The disks
tend to be more expensive , but has better performance , which is possible due
to excess SCSI bus than the PCI bus . Access the same can be done to 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 .
Disk RAID ,
promises great performance and provides a large and reliable storage . Disk is
used both in high-performance computer , or in systems that require reliability
dramatically higher 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.
Disk SATA , SATA hard disk of type ( Serial Advanced
Technology Attachment ) , the disk interface ATA ( Advanced Technology
Attachment ) with the serial version uses a thin cable that has a small cable
total about two-thirds of the total hard drive cable with type EIDE or ATA
disks are numbered 39 pins and SATA has very high speed data transmission as
well as reducing the latency . So the serial bus is capable of exceeding the
speed parallel bus .
Disk SATA
transfer data sequentially or via a serial cable and also developing their own
techniques SATA disks connected to the motherboard without system master or
slave , so the SATA cable can only be used on a single hard disk . The type of hard
disk that has been discussed , all in the category of internal hard disk , meaning that installed in
the CPU. In addition there is also an internal hard disk external hard drive ( hard disks that are outside the CPU
) , so it can be moved - move . External hard
disk has a rotational speed of 7200 rpm , very easy installation , no need
to disassemble the PC and only by connecting to a PC USB port , and can
transfer data at 480 Mbps
