Device Mapper
In the Linux kernel, the device-mapper serves as a generic framework to map one block device onto another. It forms the foundation of LVM2, software RAIDs, dm-crypt disk encryption, and offers additional features such as file-system snapshots.
Device-mapper works by processing data passed in from a virtual block device, that it itself provides, and then passing the resultant data on to another block device.
Read more about Device Mapper: Applications, Device Mapper Applications
Famous quotes containing the word device:
“One good reason for the popularity of “reductionism” among the philosophical outposts of the Western Establishment is that it can be, and is, used as a device for trying to take the wind, so to speak, out of the sails of Marxism.... In essence reductionism is a kind of anti-Marxist caricature of Marxist determinism. It is what anti-Marxists pretend that Marxist determinism is.”
—Claud Cockburn (1904–1981)