Hard drive read/write heads

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b2ap3_thumbnail_iStock_000022671491XSmall.jpgIn hard disk drives each side of every magnetic disk has its own read/write head. All heads are mounted on a single framework and move synchronously.

The structure of framework with attached heads is relatively simple. Each head rests at the end of an arm that is mounted on a little spring. The spring slightly presses the head towards disk's magnetic surface.

In the event there is no power, heads touch magnetic surface because of spring. After disks spin up, increasing aerodynamic pressure takes heads off from the surface.

Due to a tiny gap between writing surface and head, head disk assembly can be disassembled only in clean rooms. Storage media assembly is done in clean rooms of Class 100. This value indicates that a cubic foot of ambient air can contain less than 100 fine dust particles (up to 0,5 micron).

Maintaining such sterility requires a lot of money. Some companies offer “clean boxes” that can be put on top of a table. They are relatively cheap and look like big boxes with plexiglas transparent walls fitted with special gloves. Before starting the work an operator should put the required tools and devices inside the box and after that air-filtering system should be activated. After some time the purity of inside atmosphere will reach the desired indicators and only then you can start the repair.

Last modified on Friday, 22 May 2015 12:51
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Viktor S., Ph.D. (Electrical/Computer Engineering), was hired by DataRecoup, the international data recovery corporation, in 2012. Promoted to Engineering Senior Manager in 2010 and then to his current position, as C.I.O. of DataRecoup, in 2014. Responsible for the management of critical, high-priority RAID data recovery cases and the application of his expert, comprehensive knowledge in database data retrieval. He is also responsible for planning and implementing SEO/SEM and other internet-based marketing strategies. Currently, Viktor S., Ph.D., is focusing on the further development and expansion of DataRecoup’s major internet marketing campaign for their already successful proprietary software application “Data Recovery for Windows” (an application which he developed).

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