Data storage management Definitions

  • A

    access method

    In computing, an access method is a program or a hardware mechanism that moves data between the computer and an outlying device such as a hard disk (or other form of storage) or a display terminal.

  • active archive

    An active archive is a collection of data that is too valuable for a company to discard, but only needs to be accessed occasionally.

  • address space

    Address space is the amount of memory allocated for all possible addresses for a computational entity, such as a device, a file, a server, or a networked computer.

  • ADSTAR Distributed Storage Management (ADSM)

    ADSTAR Distributed Storage Management (ADSM) is a collective term for IBM's family of high-end software that helps a customer manage the storage devices (such as mainframe storage, PC disk drives, and Zip drives) that are scattered around the company.

  • AHCI (Advanced Host Controller Interface)

    An AHCI (Advanced Host Controller Interface) is a hardware mechanism that allows software to communicate with Serial ATA (SATA) devices.

  • Andrew file system (AFS)

    An Andrew file system (AFS) is a location-independent file system that uses a local cache to reduce the workload and increase the performance of a distributed computing environment.

  • archive

    In enterprise data storage, an archive is a collection of infrequently accessed data that needs to be stored for long periods of time to meet backup and compliance requirements.

  • atomic storage (atomic memory)

    Atomic storage (sometimes called atomic memory) is a nanotechnology approach to computer data storage that works with bits and atoms on the individual level.

  • B

    bad block

    A bad block is a damaged area of magnetic storage media (i.e., hard disk) that cannot reliably be used to store and retrieve data.

  • BEDO DRAM (Burst Extended Data Output DRAM)

    BEDO DRAM (Burst Extended Data Output DRAM) is a type of dynamic random access memory (DRAM) that can send data back to the computer from one read operation at the same time it is reading in the address of the next data to be sent.

  • bit padding

    Bit padding is the addition of one or more extra bits to a transmission or storage unit to make it conform to a standard size.

  • bit rot

    Bit rot is the slow deterioration in the performance and integrity of data stored on storage media. It is also known by the names bit decay, data rot, data decay and silent corruption.

  • block storage

    Block storage is a type of data storage typically used in storage-area network (SAN) environments where data is stored in volumes, also referred to as blocks.

  • brontobyte

    A brontobyte is a measure of memory or data storage that is equal to 10 to the 27th power of bytes.

  • buffer credits or buffer-to-buffer credits (BBCs)

    Buffer credits, also called buffer-to-buffer credits (BBCs), allow data communication in a Fibre Channelstorage area network (SAN) where there are long spans of fiber opticcable.

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