Il mio computer, ormai di una certa età, ha deciso di abbandonarmi e ho scoperto che il problema era dell’hard disk (menomale avevo fatto un backup di recente!). Con questa scusa ho cercato di capire com’è fatta questa parte di computer, which is the main component of mass storage (which includes also removable media such as floppy disks, CD, DVD), characterized by "non-volatility", ie the ability to permanently store the data.
A hard disk consists of dishes, coated with a magnetic layer on which data is recorded, and they revolve around a axis and above and below each platter has two heads .
The heads are a very delicate part: If banging violently against dishes can be permanently damaged (it is very risky to strike a computer running). They can also be damaged by dust.
Therefore the conservation of our data can not be entrusted to a single mass storage device. On servers or on computers of major importance can be attached hard drives that run simultaneously recording the same data on two or more disks. Most commonly used on personal enough to make up the so-called periodically on other storage devices.
The heads are a very delicate part: If banging violently against dishes can be permanently damaged (it is very risky to strike a computer running). They can also be damaged by dust.
Therefore the conservation of our data can not be entrusted to a single mass storage device. On servers or on computers of major importance can be attached hard drives that run simultaneously recording the same data on two or more disks. Most commonly used on personal enough to make up the so-called periodically on other storage devices.
(202 words)
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