• 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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  • Super Audio CD (SACD)

    Super Audio Compact Disk (SACD) is a high-resolution audio CD format. 

  • FICON (Fiber Connectivity)

    FICON (for Fiber Connectivity) is a high-speed input/output (I/O) interface for mainframe computer connections to storage devices. 

  • bus

    In a computer or on a network, a bus is a transmission path on which signals are dropped off or picked up at every device attached to the line. 

  • holographic storage (holostorage)

    Holographic storage is computer storage that uses laser beams to store computer-generated data in three dimensions. 

  • flash memory

    Flash memory is a type of constantly-powered nonvolatile memory that can be erased and reprogrammed in units of memory called blocks. 

  • orthogonal

    In geometry, orthogonal means "involving right angles" (from Greek ortho, meaning right, and gon meaning angled). 

  • 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. 

  • nonvolatile storage (NVS)

    Also see our Fast Guide to RAM. Nonvolatile (sometimes written as "non-volatile") storage (NVS) - also known as nonvolatile memory or nonvolatile random access memory (NVRAM) - is a form of static random access memory whose contents are saved when a ... 

  • mirror

    A mirror is a Web site or set of files on a computer server that has been copied to another computer server so that the site or files are available from more than one place. 

  • DVD (digital video disk)

    DVD is an optical disc technology with a 4.7 gigabyte storage capacity on a single-sided, one-layered disk, which is enough for a 133-minute movie.