Primary storage devices Definitions

  • A

    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.

  • areal density

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

  • 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.

  • B

    backup robot

    A backup robot is an automated external USB storage device that supports multiple removable SATA hard drives. The device offers small businesses and consumers many of the benefits of smart storage without the cost or complexity of RAID systems.

  • 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 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.

  • Blue Book

    The Blue Book is the informal name for the standard specification document for stamped multisession (also known as the enhanced CD or E-CD) disk format, developed in 1995 from a supplement to Philips and Sony's 1988 Orange Book.

  • 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.

  • C

    carrier hotel (colocation center)

    A carrier hotel, also called a colocation center, is a secure physical site or building where data communications media converge and are interconnected... (Continued)

  • Ceph

    Ceph is open source software providing scalable object-, block- and file-based storage under a unified system. Red Hat and SUSE sell commercially supported versions of Ceph.

  • CIFS (Common Internet File System)

    CIFS (Common Internet File System) is a protocol that gained popularity around the year 2000, as vendors worked to establish an Internet Protocol-based file-sharing protocol.

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