DASD – Direct Access Storage Device. This refers to a type of computer storage that allows data to be accessed directly, rather than sequentially, enabling faster retrieval. Commonly associated with mainframe computing, DASD typically includes hard disk drives and solid-state drives, where data can be read or written in any order via direct addressing. The term originated with IBM systems and is still used in enterprise environments to describe high-performance storage devices optimized for random access in large-scale data processing.
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