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As late as 1980, [[PDP-11]]/45 machines that used drums for swapping (and magnetic core memory) were still in use at many of the original [[Unix|UNIX]] sites.
In modern-day [[Berkeley Software Distribution|BSD Unix]] and its descendants, <tt>/dev/drum</tt> is the name of the default [[virtual memory]] (swap) device, deriving from the use of drum secondary-storage devices as backing store for pages in virtual memory. <ref name="bsddrum">{{
== See also ==
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