All About Hardisk

1. How a Hard Drive
Hard Drive: a storage device (storage) that record data quickly into magnetic pulses on a platter / disk rotating metal. When a CPU is the brains of a PC, then the hard drive serves as the heart, pumping the data vital to the entire system. As a component that drives the virtual computer, hard drive is also a mystery. Most people can not see the inside of a hard drive, blocked by the aluminum cover, though perhaps people are very familiar with the files and programs are stored, copied, moved, and deleted from the hard drive. · Hard drive into a long-term storage media on PC You. · The storage capacity on a new type of hard drive to increase each year (the current largest is 80GB), but the physical size of the drive remains relatively unchanged. · The faster a drive spins, the faster you access and transfer data. · With the increasing number of large-capacity hard drives on the market, the cost for a drive (usually measured as the number of dollars per megabyte) getting down. Hard drive provides data storage in which all modern computers need it. A hard drive stores information by placing a magnetic field through the surface of a disk coated magnetic material moving around. The main principle of a hard drive - the use of magnetism to store information - extremely miri to that used on a tape recorder or video. A hard drive for storing digital data mangetik point on the surface of a disk. A bit (composed as a bit of your data) suggests a value of 0 when the disk is magnetized in one direction, and the value 1 if the opposite direction. Each individual in a hard disk drive called a platter (plate / metal disk). A large-capacity hard drives usually contain some 3.5-inch diameter platter and use both sides as a storage medium. Drive letter itself has a motor that rotates at a speed of 4500 to 15,000 rotations per minute. Hard drive recorder uses a device called the "head" to write and read data from any surface of the platter. Drive to position a head, bergantun an arm that can move with microscopic distances above the surface of the platter on each side. So for the hard drive platter that has a five head will have ten pieces that rely on ten motor arm. Other elements in the head reads the data recorded by sensing the magnetic field at any specified bit as it passes through the magnetic element is read. drives record data on a concentric circles called "tracks", and divide each track into segments known as "sector". You can imagine that the track can be interpreted as a bookshelf where each segment is defined as the books in it. When the operating system needs a file located on a particular track and sector, then it sends the request to the hard drive to get data on that particular address.

2.How Hard Drive Works
When an operating system sends data to the hard drive for recording, The drive to process the data using a complex mathematical formula that adds an extra bit in the data. Bit it did not take place: In the future, when the data is retrieved, the extra bits that allow the drive to detect and correct errors caused by random variation of the magnetic field inside the driver. Then, the drive head to move through the appropriate track from the platter . Time to move the head is called the "seek time". While at the track is right, wait until the drive platter spins up to the desired sector is under the head. The amount of time is called "drive latency". The shorter the time `seek` and `` latency, the faster the drive the job done. As electronic components drive determines that a head is above the appropriate sector to write data, the drive sends electrical pulses to the head. Pulse generates a magnetic field that changes the magnetic surface on the platter. Variation that is now representing a recorded data. Reading the data requires some process of recording.Drive to position the reader over the head of the appropriate track, and then wait for the right sector to rotate on it. When certain magnetic spectrum that represent your data in the appropriate sector and track just above the head reader, electronic components drive detect small changes in magnetic field and convert it to bits. When the drive is seleai check on the bit error and correct it if necessary, it then sends that data to the operating system.

3.Interface? What is?
Interface hard drives are simply the hardware that manages the exchange of data between your computer and your hard drive. You usually deal with one type of interface on the PC in circulation: Advanced Technology Attachment, also known as ATA interface (or IDE, integrated device electronics). Hard drives that use this interface usually come with a variety of flavors, such as Ultra ATA, Ultra DMA or EIDE, depending on the vendor you visit. The second most popular interfaces are SCSI (small component system interface), which is widely used on the server and the drive for an older Apple Macintosh computers. the first ATA interface supports a maximum transfer rate of 8.3 MB per second. ATA-2 increases the maximum throughput to 16.6 MB per second. Although not yet a formal standard, Ultra DMA and Ultra DMA-33-66 was generally accepted by the industry the hard drive to interface with maximum transfer speed, respectively, 33MB per second and 66MB per second. Seagate recently announced it has begun shipping the Barracuda ATA III drives with Ultra ATA-100 interface is the main target to replace the SCSI interfaces on the server RAID (redundant array of independent disks).

4.Hard Drive Offers 

Encouraging Use of the IBM PC-XT type of early comes with a hard drive first mass-produced: a drive with a capacity of 5.25-inch diameter platter 10MB - the * wow * is very large at that time. Twenty years later, the latest hard drive with 3.5-inch diameter platter can store up to 70GB of data. Drive 2.5 inch smaller on the notebook can hold up to 25GB of data. And a diameter of 1 inch Microdrive is designed for digital cameras, players, and handheld computers that can accommodate up to 1GB of data. Along with the transition size reduction drive and a larger capacity has lowered the cost per megabyte of storage dramatically, so that any large-capacity drives can be had by ordinary computer users. You can buy a hard drive designed specifically for three distinct uses: desktop PC, the computer notebooks, and servers. Attributes which distinguish them not at capacity - although more nicer - but on other factors that determine the performance: the speed of the motor drive, on-board memory, the drive interface, and power consumption.

5.Drive Special Duties 

Specific To become the most important price on the consumer desktop market. A computer system that is built from the ground may include a high-speed 5400-rpm drive with IDE interface, the curve represents the sweet spot of price-versus-performance (price-performance), a price below U.S. $ 300 for a decent amount of storage space a lot. High-performance workstations is usually accompanied by 7200-rpm drive, and in the next year 10,000-rpm speeds are common. In the notebook computer market, the most important thing is power conservation. Drive slow spinning hard drives reduce power consumption of laptop batteries. Storage resources on a notebook drive away than to drive up to the desktop, due to its small size platternya. In the server market, most important goal is performance. On a commercial server that handles the online sales, for example, the drive must be able to handle many requests for data in different sectors as quickly as possible.Here, you'll see a lot more drive with SCSI interface (which is in the set-up in a line of RAID) rotates at a speed 10,000-rpm, and the drive speed of up to 15 000-rpm rotary has started to reveal itself. Drive has several drawbacks, such as the heat generated higher and more noisy than usual drive.

6.Harga Always Rain

In the last three years, hard drive prices have plummeted while capacity is increasing.Vendors have warned that they eliminate the unnecessary costs of the drive with the integration of electronic components, reducing component count and increase reliability.With 150 million drive that will be marketed this year and the estimated 200 million more in the next two years, the market is already very large this seems to be growing. System desktop worth less than U.S. $ 1000 typically offer drive 8GB or larger, which is the value of The minimum you should get on most systems. For middle-class desktop with a price range of around U.S. $ 1500, a 40GB hard drive capacity is more frequently encountered.But one vendor estimates, in the next five years, the proportion of the price allocated to the computer hard drive will increase slightly. Costs for other components will drop the cost for hard drive maintained constant. It's not a bad news: As capacity increases, cost per megabytenya tends to decrease. When you are satisfied with your current desktop systems, but only wanted to increase the storage capacity of your disk, just add a new hard drive.Unless you buy a drive for a big server who sat in the office, drive popular now able to provide satisfactory performance (with the rotary speed of 5400 up to 7200-rpm) and of sufficient capacity (20GB-40GB) for the money you spend. As of this writing, the online computer store you can find the hard drive from Maxtor Diamondmax 30GB at prices below U.S. $ 200. While the money of U.S. $ 260 you can get a Maxtor drive with a capacity of 40GB. IBM sells the drive capacity of 75GB, which is intended for enterprise servers with prices ranging from U.S. $ 500. When you buy a new drive, you can see that the vendors and shops usually sell out "maximum transfer rate" or "burst speed" of their drive. The value does not mean anything, they just describe the specifications of the drive interface. Usually these values ​​are used as marketing propaganda; in general, your drive will not reach the level of maximum speed.

7.Masa Home Hard Drive
Based on the commercial development of the head giant magnetoresistive (GMR), which gives strength to the current large-capacity drive, drive capacity doubled two every 18 months. In the next five years, GMR technology will be able to double the capacity of hard drives every 12 months. Furthermore, the vendor must find a way to fight the laws of physics and learn how to create a more seamless platter and a smaller head. One of the biggest challenges will be concerned at this point called super-paramagnetic limit, where the bit size of the drive will be very small so that the thermodynamic fluctuations can cause data loss. And a storage company is currently engaged to seek new kind of storage. Even so, according to one hard drive vendor, the future of this industry is very bright - especially for its customers.

Sources: http://www.infokomputer.com