Storage Technology Definitions

  • C

    compression artifact

    A compression artifact is the fuzz or distortion in a compressed image or sequence of video images.

  • Content Protection for Removable Media (CPRM)

    Content Protection for Removable Media (CPRM) is a hardware-based technology designed to enforce copy protection restrictions through built-in mechanisms in storage media that would prevent unauthorized file copying.

  • content-addressed storage (CAS)

    Content-addressed storage (CAS) is a method of providing fast access to fixed content (data that is not expected to be updated) by assigning it a permanent place on disk. CAS makes data retrieval straightforward by storing it in such a way that an object cannot be duplicated or modified once it has been stored; thus, its location is unambiguous.

  • continuous data protection (storage convergence)

    Continuous data protection (CDP), also called continuous backup, is a storage system in which all the data in an enterprise is backed up whenever any change is made. (Continued...)

  • converged network adapter (CNA)

    A converged network adapter (CNA) is a single network interface card (NIC) that contains both a Fibre Channel (FC) host bus adapter (HBA) and a TCP/IP Ethernet NIC.

  • copy data

    Copy data is the electronic data that is created as a result of data protection functions like backups, snapshots and disaster recovery.

  • copy data management (CDM)

    Copy data management (CDM) is a method of reducing storage consumption and sprawl caused by unnecessary copies of production data.

  • D

    DASD (direct access storage device)

    Direct access storage device (DASD, pronounced DAZ-dee), is a general term for magnetic disk storage devices. The term has historically been used in the mainframe and minicomputer (mid-range computer) environments.

  • DAT USB drive

    A DAT USB drive is a tape drive with digital audio tape (DAT) that can be plugged into a Universal Serial Bus (USB) connection as a simple and relatively low-cost way to back up data routinely, especially on servers. DAT USB technology is expected to make it easier and more affordable for small and medium-size businesses, as well as for larger enterprise data centers, to perform backup and restore operations.

  • data at rest

    Data at rest is a term that is sometimes used to refer to all data in computer storage while excluding data that is traversing a network or temporarily residing in computer memory to be read or updated.

  • data availability

    Data availability is a term used by some computer storage manufacturers and storage service providers (SSPs) to describe products and services that ensure that data continues to be available at a required level of performance in situations ranging from normal through "disastrous.

  • data center migration plan

    A data center migration plan is a strategy created by an organization to migrate a data center with minimal downtime.

  • data compression

    Data compression is a reduction in the number of bits needed to represent data.

  • data deduplication

    Deduplication retains one unique data instance to reduce storage and bandwidth consumed by remote backups, replication and disaster recovery.

  • data destruction

    Data destruction is the process of destroying data stored on tapes, hard disks and other forms of electronic media so that it is completely unreadable and cannot be accessed or used for unauthorized purposes.

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