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Get info about the Encyclopedia of Networking and Telecommunicatons, 3rd edition (2001)
Download the electronic version of the Encyclopedia of Networking, 2nd edition (1996). It's free! Contribute to this site Electronic licensing info
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Duplexed Systems Related Entries Web Links New/Updated Information Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM. A duplexed system provides data protection in the form of mirroring, in which data is simultaneously written in two places at once. Mirroring implies that two disks are present, but attached to one disk channel (adapter card). Duplexing implies that each disk is attached to its own adapter card, which adds another level of protection. The entire server can also be duplexed so users are never without a server should one server go down. Duplexed servers are attached with high-speed interfaces (fiber) and can be placed in separate locations to protect them from local disasters. Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.
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