What is a hard drive?

Hard disk, also known as HDD (HDD), is an essential part of modern computers. It works as an internal storage device and allows the computer to accommodate and perform important files and programs such as the machine operating system, and its components work actively search, read and write data about files generated by users. However, the fine nature of the standard hard disk is prone to damage and corruption or loss of data and repair or replace one can be costly. Damage can often be prevented by minimizing the units of environmental factors such as dust and harsh handling.

There are two main types of hard drives: internal and external. The internal unit is the main storage of the computer and usually contains operating system and programs that users install manually. Most computers refer to this as unit C and this primary will be installed by the partition by default. Modern computers often have several hundred gigabytes of storage thatThey provide enough space for the average collection of applications, documents and media users throughout the life of your computer. The internal unit usually connects to the computer via parallel advanced technologies (heel), ATA (SATA) series, or a small computer system interface (SCSI).

external units

External units are usually used to retain backup copies of documents and programs, to store archived files or to hold large data files, which are used regularly. They usually do not include the operating system or any programs that are needed to work. Most are connected to the machine via USB or Firewire® connection, although some wireless models are also available. Sometimes they are also called portable units, as they can often be easily launched from one computer to another.

TechnologistIE Memory

The traditional hard disk uses similar memory storage technology for cassettes and videotazems. Like tapes, these units contain round, mirror plates that are covered with fine magnetic material. Plates are usually made of glass or aluminum, but may seem glossy due to polished magnetic material on their surfaces.

Like the head inside the cassette player or video recorder reads data on the tape, the head inside the hard drive unit reads and writes data into plates. When he writes, the head causes to change the direction of magnetic material on plates to represent binary bits of data that are stored and then can be read. It is located on the arm next to the plates and the head turns back and forth, constantly looking for or writing new information.

internal components

The average modern unit of the hard disk has several plates inside the second, as a sandwich cookie. The small gap between each plate allows you to go through the heads. Heads rely on SThe arm of the arm, but has separate branches, similar to the forks of the forks on its side.

When the computer is turned on, the plates start to rotate immediately. Those on the hard drive on the desktop usually increase up to about 7,200 rotations per minute (RPM), while units on computers with laptops usually run at 5,400 rpm, although it is not unusual to see top drives that reach 10,000 or 15,000 rpm. If the unit does not run, the constant hum can be heard.

plates are still spinning even if there is no data obtaining or memory writing. ARM only moves when the program is running or open, stored or deleted. During these processes, the arm can travel up the surface up to 50 times per second. In fact, the head never affects plates, but instead slips just above them, a supporting man of movable air, which is generated by spinning discs.

Drives in solid state

Although plate technology controls sentencesSewing of hard drives on the market, there is an increasingly available number of firm disks (SSD). Instead of spinning discs, they contain no moving parts; Instead, the data is stored on special computer chips. This technology allows you to read and write data faster and discs are not as prone to physical damage as conventional hard drives, but are usually much more expensive. Without moving parts, the SSD may have a longer life than conventional units because there is no engine to burn or break. However, if the drive fails, it can do so suddenly and without warning and all data can be completely lost.

hybrid units

There are also hybrid units that combine standard hard drive and SSD. Hybrid plates are not constantly rotated and the part of the unit is only activated if necessary. The data that is regularly induced is stored on the SSD and moved to the plates only when the unit is full. This can mean faster triggering times and power PCrumpets at a lower price than the use of the SSD itself, but programs that require a lot of memory may not be faster because they will rely on a traditional unit.

Normal problems

There are several ways to endanger the function of the standard hard disk. Rapid movement and gentle maneuvering of plates and heads inside the disk is susceptible to the "head crash" in which the heads touch the plates and damage the magnetic surfaces. Plates of dust exposed can cause the disk hand as soon as it works, and the spindles can get stuck, resulting in the locked components. Entering a computer or fall can cause electromagnetic damage even when the machine has been turned off.

Repair and Exchange

Fixing on standard hard drive units can be expensive and the opponent can with the cost of new, low -capacity computers. This work usually must perform a professional and open the units at home usually destroy and cancel any warranty. Many computer experts also recommendedThe newcomers do not try to replace the broken unit at home due to the fine magnetic properties of the disk and the high risk of damage to other electronic components inside the computer.

avoiding problems

There are certain things that a computer user can do to keep the hard disk longer longer. People should always gently handle any machine, because even a suddenly moving laptop can cause a head crash. It is best to move a computer that is turned on as little as possible because the disk is more likely to be damaged while running. Although the drive is sealed, users should keep the entire machine as much as possible without dust and make sure that the fan and any other cooling devices are clean and work properly. Regularly back up your computer data on external drives, flash drives or cloud services can protect users from losing important files if the unit fails and needs to be repaired or replaced.