>>1538976>s a dust free room mandatory?It's required if then plan on reading it using its own hardware in normal operation.
A portable one like this probably has 5400 rpm, that means in operation it rotatates at an insane speed, creating a microscopicly thin film of air the head is gliding on. A dust particle is like a rock at those dimensions if it crashes into it at 90 km/h.
This the usually leads to a chain reaction of fine particles from the surface speeding around causing abrasion, which results in even more particles and so on.
