不像是人類可以創造出來的東西
for example... disk drive
"Disks read and write bits stored on the magnetic surface using a read/write head connected to the end of an acutator arm. By moving the arm back and forth along its radial axis the drive can position the head over any track on the surface...Once the head is positioned over the desired track, then each bit on the track passes underneath, the head can either read the bit or write the bit..." - Computer System
SIMPLY AMAZING~~~~~~~~!!
"The read/write head at the end of the actuator arm flies on a thin cushion of air over the disk surface at a height of about 0.1 microns and a speed of about 80km/h....at these tolerances, a tiny piece of dust on the surface is a huge boulder...the result is head crash...for this reason, disks are always sealed in airtight packages." - Computer Systems
嗯 因為明天要考試...順便複習一下 =P
and this is why your CD looks like this~
it has the same shape as the platter.. therefore, one by one, each single bit is copied onto your CD~ amazing~ =D
No comments:
Post a Comment