What Does Data Mirroring Mean?
Data mirroring refers to the real-time operation of copying data, as an exact copy, from one location to a local or remote storage medium. In computing, a mirror is an exact copy of a dataset. Most commonly, data mirroring is used when multiple exact copies of data are required in multiple locations.
Similarly, a live mirror is an exact copy of a dataset when it is immediately changed as the original is changed.
This term is also sometimes known as disk duplexing.