A data storage device consisting of a rotating cylinder with a magnetizable outer surface on which the data can be stored; (as a mass noun) storage capacity or facilities of this type.
Origin
1950s.
Definition of drum memory in US English:
drum memory
noun
Computing historical
A data storage device consisting of a rotating cylinder with a magnetizable outer surface on which the data can be stored; (as a mass noun) storage capacity or facilities of this type.