Tape drive and hard disk drive
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A magnetic storage device is a device that uses a magnetic head to read and write data to and from a magnetizable medium. The medium can be as basic as a plastic tape that is coated with fine particles of a metal, such as is found in audio recording and tape storage devices.
Hard Disk
It is a data storage medium
CD-ROM
A hard drive.
A hard disk drive is a type of magnetic storage device. A magnetic storage device stores data on a magnetized medium. Other types of magnetic storage includes magnetic recording tapes and the stripes on credit cards.
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For what storage medium are phase change alloys used?
RAM is a primary storage medium, but it is volatile. Cache memories storage frequently accessible data.
A medium is the base substance for some task or experiment. Storage media include any technological devices used to store, keep and retrieve data (information).
i dont know In case of magnetic storage, randomly distribuited tiny magnets present in the magnetic coating gets aligned according to the frequency and voltage levels of the information/data to be stored, thus leaving a magnetic signature of the information fed in electrical form. In case of optical storage bumps and pits are created on the medium to distinguish the variations in the signal to be stored with the help of laser beam. Depth and length of the pits corresponds to the change in information.
DVD and RAM are not permanent storage devices.