A method, system, and apparatus for controlling the behavior of an
application through a device or device subtype in a logical volume
manager. The present invention allows for creating device types or
subtypes to be used when creating a logical volume. The device type or
device subtype specified during the creation of the logical volume
signals to an application that the application may perform a particular
behavior. The use of alternate device types and subtypes when creating a
logical volume inform an application that the application can behave in a
new way defined by the device type and subtype.