Understanding Storage Hierarchy in Computing Systems

Storage hierarchy consists of primary, secondary, tertiary, and off-line storage. Primary storage, like RAM, is directly accessible to the CPU. Secondary storage, such as hard disks, retains data even when powered off. Tertiary storage involves robotic mechanisms for managing removable media. Off-line storage requires human interaction and is disconnected from the processing unit. Various characteristics like volatility, mutability, and accessibility define different storage types. Measurement characteristics include capacity, performance, and accessibility mode (sequential or random access).

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