hard disk noun
computers : a disk that is not flexible and that is used to store computer data
: a rigid metal disk coated with a magnetic material on which data for a computer can be stored; also : hard drive
Examples of HARD DISK
- Remember to save the file to your hard disk.
First Known Use of HARD DISK
hard disk noun (Concise Encyclopedia)
Magnetic storage medium for a microcomputer. Hard disks are flat, circular plates made of aluminum or glass and coated with a magnetic material. Hard disks for personal computers can store up to several gigabytes (billions of bytes) of information. Data are stored on their surfaces in concentric tracks. A small electromagnet, called a magnetic head, writes a binary digit (1 or 0) by magnetizing tiny spots on the spinning disk in different directions and reads digits by detecting the magnetization direction of the spots. A computer's hard drive is a device consisting of several hard disks, read/write heads, a drive motor to spin the disks, and a small amount of circuitry, all sealed in a metal case to protect the disks from dust. In addition to referring to the disks themselves, the term hard disk is also used to refer to the whole hard drive.
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