A - 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.

  • access time

    Access time is the time from the start of one storage device access to the time when the next access can be started.

  • 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.

  • AIT (advanced intelligent tape)

    AIT (advanced intelligent tape) is a magnetic tape and drive system used for computer data storage and archiving.

  • 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.

  • application-aware storage

    Application-aware storage is a storage system with built-in intelligence about relevant applications and their utilization patterns.

  • archival storage

    In computers, archival storage is storage for data that may not be actively needed but is kept for possible future use or for record-keeping purposes.

  • 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.

  • areal density

    Areal density measures the amount of data that can be stored on a given amount of physical space on a disk drive.

  • array-based memory

    Array-based memory is an evolving solid-state storage technology similar to flash memory but with potentially greater storage capacity. The increased capacity results from the fact that array-based memory is three-dimensional (3D) while most traditional memory and storage media are two-dimensional (2D)... (Continued)

  • ASPI (Advanced SCSI Programming Interface)

    ASPI (Advanced SCSI Programming Interface) specifies how an application program can communicate with a SCSI (Small Computer System Interface) device through a common SCSI device driver.

  • ATA over Ethernet (AoE)

    ATA over Ethernet (AoE) is an open source network protocol designed to connect storage devices and servers in a storage area network (SAN). ATA (Advanced Technology Attachment) is a standard interface for communication between storage devices; it is known in the computer industry as Integrated Drive Electronics, or IDE. In AoE, the ATA commands are transported directly via Ethernet. That makes AoE an inexpensive alternative to Fibre Channel SANs, which require costly dedicated networks.

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