Kõvakettad

Kõvakettad, known in English as hard disk drives (HDDs), are a fundamental component of most modern computers. They are a type of non-volatile storage device that uses magnetic storage to store and retrieve digital data. This means that the data remains even when the power is turned off. The core of a hard disk drive consists of one or more rigid platters coated with a magnetic material. These platters spin at high speeds, typically between 5,400 and 15,000 revolutions per minute (RPM). A read/write head, mounted on an actuator arm, moves across the surface of the spinning platters to read or write data. Data is organized into tracks and sectors on the platters, forming a grid that allows for precise access to individual pieces of information. The capacity of a hard disk drive is measured in gigabytes (GB) or terabytes (TB), indicating the total amount of data it can store. Key performance metrics for HDDs include access time (the time it takes to locate a specific piece of data) and transfer rate (how quickly data can be read from or written to the drive). While solid-state drives (SSDs) have become increasingly popular due to their speed and durability, HDDs remain a cost-effective solution for large-capacity storage needs in both personal computers and enterprise environments.