3 ms·

Why not a vacuum?

• deegles 11y ago
  Because hard drive heads "float" on a bed of air as the disk spins. Helium allows the heads to float closer. This wouldn't be possible in a vacuum.
• baobrien 11y ago
  The heads in an HDD don't actually touch the surface, they ride on the layer of gas above the spinning platters.
  • Freaky 11y ago
    At a flying height of <10nm.