Episode 77 - Magnetic Memories
Advent of Computing
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The Pros and Cons of Magnetic Drum Memory
magnetic drum memory has some major benefits over capacityr based memory. Operations are non destructive and the head just checks for a change in magnetic flux. That means there's no bit flipping and no need to regenerate bits after a reed operation. Better still, magnetic drum memory is non volatile. Once set a bit will hold its value until you write to it again. These drums never need a refresh. The other big plus here is the component costs are relatively low. You don't need thousands of capacities. But of course, there are issues. All drum memory, no matter what it uses to actually store data, is still mechanical. It relies on physical movement. And say it with me,
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