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.
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