низкоуровневое управление логическими томами (low level logical volume management)
Описание (Description)
dmsetup manages logical devices that use the device-mapper
driver. Devices are created by loading a table that specifies a
target for each sector (512 bytes) in the logical device.
The first argument to dmsetup is a command. The second argument
is the logical device name or uuid.
Invoking the dmsetup tool as devmap_name (which is not normally
distributed and is supported only for historical reasons) is
equivalent to dmsetup info -c --noheadings -j major -m minor.
