The storage industry has overwhelmed a number of industries with the current buzzword, "information lifecycle management" (ILM). This is a basic concept with a basic premise: "Use the right storage media for information during its business life, to meet business creation, usage, and regulatory requirements of the information, at a cost consistent with its current usage value to the corporation." In short, when you create a piece of information/data, use the proper storage device and media during its life; that is, fast, more expensive devices (generally disk) during times of high recall and use, and slower, very inexpensive devices during periods of low recall and use.