When multiple disk controllers are used in a drive mirroring scenario, it is known as which of the following?

In a drive mirroring scenario, employing multiple disk controllers is referred to as disk duplexing. This configuration enhances reliability and performance by using separate controllers for each disk in the mirrored pair. The distinct controllers ensure that if one fails, the data is still accessible through the other, thereby minimizing the risk of downtime and data loss.

This technique differs fundamentally from data replication, which generally involves copying data from one location to another for redundancy or transfer purposes, and data backup, which typically refers to the process of creating copies of data for recovery in case of loss. Disk cloning involves creating an exact copy of a disk's contents and is not focused on live data mirroring with redundancy through separate controllers. Disk duplexing specifically highlights the dual-controller setup designed to enhance fault tolerance in mirrored storage systems.