D2D
Short for disk-to-disk, a type of data storage backup in which the data is copied from a disk-typically a hard disk-to another disk-such as another hard disk or other disk storage medium. In a D2D system, the disk that the data is being copied from typically is referred to as the primary disk and the disk that the data is copied to typically is called the secondary or backup disk.
Contrast with D2T. One advantage of a D2D system over a D2T system is that backup files can be accessed directly just like any disk system. Tapes, conversely, have to be searched linearly and are not as expedient at retrieving data.
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- D2D2T
Short for disk-to-disk-to-tape, D2D2T is an archiving device where data is first backed up on a disk system, but then is spooled to a tape or an optical storage system. The D2D2T device can help eliminate data loss issues companies experience with tape drive or tape failure. Using a D2D2T system of backup keeps a […]
- D2T
Short for disk-to-tape, a type of data storage backup in which the data is copied from a disk-typically a hard disk-to a magnetic tape. D2T systems are used widely in enterprises that require the safe storage of vital information in the case of disaster recovery so it can perform data recovery.
- DAA
Short for Data Access Arrangement, part of a modem��s system for interfacing with a telephone network. The DAA provides the analog circuits that electrically isolate the modem from the phone line, separating the modem from the telephone line��s higher voltage. The FCC requires this feature of any device that connects to the PSTN, including fax […]
- DAC
(1) Short for digital-to-analog converter. (2) Short for Discretionary Access Control.
- DACS
Short for digital access and cross-connect system.