We’ve seen that it’s possible to save data from a dead hard drive, but how does it all work? https://www.takingitmobile.com/ will guide you through the whole process.
One of the things intrigued by all computer users who are familiar with the intricacies of their electronic meshes is a piece of hardware known as a hard drive. Many of us have come up with the idea of opening such a device and seeing what is inside, however, for this we need to have a copy of a corrupted hard drive, as well as a set of torx screwdrivers for the home conditions quite non-standard.
Since the content of the hard disk does not disappear during its shutdown, the data in it can not be accessed directly, and the hard disk belongs to secondary memory devices, and because the hard disk capacity is much larger than the primary memory (RAM) capacity, hard disk belongs to mass memory devices.
Although the hard drive concept is about 50 years old, modern hard drives are quite different from their ancestors. Reducing device dimensions, as well as increasing performance, are the easiest differences, and in order to be enabled, the latest technologies and materials are constantly implemented in hard drives.
How it works?
Simple and zonal geometry
Modern hard drives do not differ significantly in terms of parts that make up them. From the outside, on the average hard disk, the printed circuit board is located first on which the components that control the operation of the device are located and provide a stable supply of all mechanical and electronic components. On this panel there are voltage stabilizers, controller, ROM, which houses the firmware and RAM used for caching data. ROM hard disk drive is particularly important because it includes so-called “adaptive”, in addition to the firmware, data that is different for each individual hard drive, which allows “exactly the head to work with that particular engine and just those boards.”
When the hard disk is opened, the first thing that comes to mind is the data boards. In the beginning, the plates were completely made of ferromagnetic material and their diameter was up to one meter, while their capacity was extremely small compared to today’s boards. Modern hard drives use plates that are usually made of some kind of plastic and coated with a layer of ferromagnetic material. When making the panels, special attention is paid to their shape: in addition to having to be balanced so as not to bring horizontal vibration to the device, the tolerance of the roughness on the surface is very small.
Once upon a time, the heads that used to read and write data touched the board. In order to avoid friction and damage to the board, on more modern hard disks the heads do not touch the panels, but are located at a very small distance from the surface of the panels. The result of the unevenness of the plates is the variation of this distance, which affects the quality of reading and writing, and in extreme cases it can also cause the so-called. head crash, that is, collision of the head with a plate and their damage.
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