How Does a Hard Drive Work

The hard drive is a lot complicated device than it seems. And data recovery toronto will explain it to you deeply. 

A special engine on which the shaft is evenly stacked is used to start the boards. These engines must be very durable, both in terms of a large number of operating hours and a large number of start / stop cycles (turning on and off the hard disk). Their other important feature is the stability of angular velocity. In order to keep the speed at which the engine rotates the panels constant, the engine in every hard drive today contains a special servo system that can correct its work.

Also, when the motors for plate rotation are concerned, the big problem that has arisen in recent years is the noise they produce. This noise comes from the bearing in which the rotor of the engine is mounted (the axle on which the panels are). To reduce noise, these bearings evolved from a standard sleeve, through a ball bearing, to a most recent variant based on fluid dynamic bearing.

The second part of the hard disk that opens into the eyes after opening is the hand on which the read and write heads are located, as well as the engine that runs it. In the first hard drives, the engine running the head was a stepping stepper motor. This engine can be started only in steps of a certain length (eg 1 °) and can be held in a certain position. On modern hard disks, the hand and engine represent a mechanism called the Voice Coil Actuator (VCA). VCA works by the same principle as the speakers. Through the spool in a strong magnetic field, the current is lost, causing its movement. These motors can move freely (and not in steps), and keeping the same position is more complicated. The reason for the transition from stepping motors to the VCA lies in the fact that the objects on the heat are wider while collecting in the cold. Because of this, it is necessary to have a system by which the head position can be adjusted, which is much easier to perform with VCA engines.

Under the geometry of a hard disk, the physical organization of space is used to store data. The hard disk geometry is determined in the factory, a process known as Low Level Format (LLF). Each panel on which data is stored is divided into tracks. By shape, one path is a circle and represents a part of a plate that the head can read without moving. Each path is made up of sectors. Data are stored in sectors. Sector size is expressed in bytes and in this respect all sectors are equal. The data can be accessed by giving the regular track number and the number of sectors in which they are located. It should be noted that the sector is also the smallest amount of data the hard disk can read or write separately.

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