[jimbooonooo]

Rejection of neighboring HDD vibe disturbances is already an issue, so fascinating to see what their control approach is. In my limited experience, mechanical HDD control is near top of the game for electromechanical positioning.

[HPsquared]

At least they know what all the heads are doing so could design them to cooperate or model/predict the disturbances pretty well, unlike for external vibrations from neighbouring disks.