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disk duplexing

   Also found in: Wikipedia, Hutchinson 0.03 sec.

The recording of redundant data for fault tolerant operation. Data are written on two separate disks within the same system. Each disk drive is connected to its own controller. See disk mirroring and RAID.

(hardware, storage)disk duplexing - A variation on disk mirroring where, as well as redundant disk drives, a second disk controller or host adapter is also present.
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The dual disk drive/controller card option results in a special type of mirroring protection called disk duplexing.
Back up your data to survive a disaster; what you should know about ... by Hunton, James E. / Journal of Accountancy
Scalability and high-availability are embedded within the HP NetServer LX Pro Series, which has a large memory and storage capacity to handle large database applications, with ECC memory scrubbing, redundant power supplies, hot-swap disks, built-in disk duplexing and server auto-restart.
HP NetServer LX Pro Series To Deliver Combined SAP and Informix ... by Business Wire
OS/2 Warp Server is available in two versions: OS/2 Warp Server Version 4, which includes all of the features already mentioned and supports approximately 120 users for file and print sharing and 1,000 users for application serving; and OS/2 Warp Server Advanced Version 4, which includes the same features, plus fault tolerance (disk mirroring for two disk drives and disk duplexing for two controllers), enhanced Pentium optimization and user disk limits.
IBM announces availability of OS/2 Warp Server; So much ability ... by Business Wire
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