The 2006 slides linked in the article (.ppt, not PDF) mentioned, in page 14, that the plate would be oscillating at 800 Hz (moving +/- 80 micron). The current

The 2006 slides linked in the article (.ppt, not PDF) mentioned, in page 14, that the plate would be oscillating at 800 Hz (moving +/- 80 micron). The current website page, http://www.dataslide.com/technology.html http://www.dataslide.com/technology.html , appears to say 250 micron, no frequency given. Anyway, it's a lot more than 64 read-write heads, but only 64 are used at a time. Still looking at millisecond latency, if the 800 Hz holds.