Storage Hierarchy Technology and Organization
Claus Schünemann, Wilhelm Gustav Spruth · 1978
The storage subsystem of a data processing system comprises those components that store programs and data. This includes the spectrum from bulk storage with its own microprograms to the buffer stores (cache stores) and registers located in the Central Processing Unit (Fig. 1). Present storage subsystems are almost exclusively implemented in the form of several independent storage hierarchies with their own address spaces. The cost of the storage subsystem can be more than 50 % of the total system hardware cost (Fig. 2).