[Context if needed on them](https://en.wikipedia.org/wiki/Hard_disk_drive), A few old ones I own stopped working due to their spin, and I’m curious to see why it happened to both of them
In: 3
The disks move around a spindle that is in the center of the disks. Any two things moving past each other like this will slowly wear against each other, just as water will slowly wear away stone.
Eventually, this wear is bad enough that something starts to rub seriously. Heat is generated and it gets worse fast. Soon there is enough wear that the surfaces do not move past each other at all and instead act like brakes.
At this point, everything seizes up and the disks will no longer spin.
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