Hard drive

How Hard Disk Drives Use Magnetism to Store Information

Of all of the crazy things about our modern world, I’ve always been most amazed by the way that so many gadgets have become normalized to the point that society completely depends on them, yet only a tiny percentage of people have any idea how those gadgets function. For the most part, people don’t even know how their dimmers work, much less how their laptop accesses the internet. Of course, part of how our society works is by having individuals specialize, and then share the benefit of their knowledge (for a price). Just for the sake of being well-rounded then, here’s a little information about how your hard disk drive stores information.

magnetized nailInherent to your hard drive’s ability to store information is the physical concept of magnetism. You’ve probably fooled around with magnets some, and may have even done that experiment in school where you rub a magnet back and forth on an iron nail, effectively magnetizing it.

Magnetism has been harnessed by humans for a long time. A rather simple example is in the common junk yard, where large magnets are used to pick up large piles of scrap metal.

A use that is just as prevalent but less understood involves sending messages. Whether or not something is magnetized can imply information. Because computers store information using binaries, binary code can be matched to magnetized or not-magnetized microscopically small pieces of metal.

In your computer’s hard drive, these “pieces of metal” are actually magnetized areas embedded in the hard drive’s circular plate or “platter.” Each area can be independently magnetized (to store a 1) or demagnetized (to store a 0).

The platters are by far the most crucial aspect of the hard disk drive. They are generally made of glass or aluminum that is then coated with a thin layer of metal that can be magnetized or demagnetized. Smaller hard drives have only one platter, while larger drives could have entire series of platters staked on a central spindle with a small gap in between them. Platters need to rotate extremely quickly (up to 10,000 revolutions per minute) for the read-write heads to access the information stored on them.

hard drive2Once the 0’s and 1’s are stored, an arm mechanism moves a tiny magnet (called a read-write head) back and forth over the platters to either record or store information and act as a link between the hard drive and the rest of your computer.

Regardless of how many platters there are, there will always be two read-write heads for each platter. One is designated for reading the top surface of the platter and the other is designated to read the bottom surface. The read-write heads are mounted on an arm that can move from the center of the drive to the outermost parts. The read-write heads never touch the platter; there is always a layer of fluid or air maintained between them, at least in a functioning drive.

That’s all for now, but here’s a fun fact: magnetism is an excellent power to harness for computer storage because even when the power is shut off the data continues to be stored.

How Malwares can be Omitted Permanently?

Malware is basically any program which installs itself on the computer without the permission of the user and starts performing some unwanted activities. More and more malicious software programs are introduced into the internet very day, including worms, viruses, spyware, Trojans, adware and key loggers. Different the forms of malware course different degrees of system harm and should be removed immediately once detected.

fgh1Some programs are persisted on the computer and cannot be omitted using the normal virus-scan procedures. Once they are deleted or quarantined by the anti-virus program, they leave key-log files behind causing unwanted system behaviour. They need advanced procedures to completely get out. You can completely omit malware using system utilities in the windows Operating system, a malware database solution center or the computer control panel.

The malware database solution center

The malware database solution centre of any malware website helps remove persistent malware files on both computer hard drive data recovery and external discs

• Connect the infected external hard drive to the computer and back up any important files to your computer hard drive just in case the drive gets damaged in the removal process

• Visit a malware website such as Fast PC Clean or Dedicated 2-Viruses. Depending on the symptoms shown by the infected devise, record the registry entries, directories and system files of ye malware infection.

You can also omit the malware manually using the system utilities

1. Open the task manager and then click the malware file names on the processes tab. Then end the processes.

2. On the file search on the start menu search bar, type Regedit to open the registry editor utility. On the tool bar, click “Edit” and then “Find”. Search for the names of the malwares and delete them. Close the Registry editor

3. After you close the registry editor, right click on the “Start” button and select explore to go to the windows explorer. Type the name of the folder or file system associated with malware on the search field. When they appear on the display, delete them

4. Go to the “Recycle Bin” and permanently delete the files by emptying the bin

If your computer displays error widows after you have deleted the viruses, run the windows repair utility in the control panel or using the systems disc to repair broken registry files. On the control panel’s administrative tools, open the task scheduler and search for the name displayed on the error window, and then delete it.

fgh2Using the system utilities Operating system disc

The operating system disc has an auto-recovery procedure which removes malware programs by formatting and re-installing a new Operating System. This procedure is the best malware removal method if the level of damage is too high. You need to back up your important documents in an external hard drive before you format the system. Once you back up your user files reboot the computer and begin a procedural installation of a new operating system. When it prompts to format everything, click OK to ensure that no files are left on the machine. In case you are unable to access the files on your hard drive, make sure to hire data recovery experts in order to save your data!