Drum Memory - Use and Legacy

Use and Legacy

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 sites.

In modern-day BSD Unix and its descendants, /dev/drum 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.

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