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.
