• direct-attached storage (DAS)

    Direct-attached storage (DAS) is computer storage that is directly attached to one computer or server and is not, without special support, directly accessible to other ones.

  • delta differencing

    Delta differencing is an incremental approach to backup that only backs up blocks that have changed after the first full backup. The differences are recorded in files called deltas.

  • network-attached storage (NAS)

    Network-attached storage (NAS) is a dedicated hard disk storage device that provides file-based data storage services to other devices on the network.

  • auxiliary storage

    Auxiliary storage is all addressable data storage that is not currently in a computer's main storage or memory.

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  • magnetoresistive head technology

    Magnetoresistive (MR) head technology is used in disk drives to allow higher storage densities than the older inductive-head technology. 

  • thin-film disk

    A thin-film disk is a hard disk storage medium with a very thin coating of a metallic alloy or glass instead of the usual carbon-based material found on other types of hard disks. 

  • video RAM (VRAM)

    Video RAM (VRAM) means in general all forms of random access memory (RAM) used to store image data for a computer display. 

  • Jaz drive

    A Jaz drive is a small, portable hard disk drive used primarily for backing up and archiving personal computer files. 

  • volume

    In computers, a volume is an identifiable unit of data storage that is sometimes (but not always) physically removable from the computer or storage system. 

  • shadow RAM

    Shadow RAM is a copy of Basic Input/Output Operating System (BIOS) routines from read-only memory (ROM) into a special area of random access memory (RAM) so that they can be accessed more quickly. 

  • single-electron memory (SEM)

    Single-electron memory (SEM) refers to experimental hardware technologies in which the position or presence of a single charge carrier, usually an electron, makes the difference between the logical low (0) and high (1) states in a digital system. 

  • helical scan

    Helical scan is a way of recording information onto magnetic tape. 

  • giant magnetoresistive effect

    GMR is the newest generation of hard disk drive storage. 

  • Memory Stick

    Developed by Sony, the Memory Stick is a digital data storage technology with up to 10 times the storage capacity of a 3.5 diskette.