Some higher-end professional cameras use PCMCIA hard disk drives as their storage medium. Although they consume no power once images are recorded, and have much higher capacity than flash memory (a 170MB drive is capable of storing up to 3,200 images standard 640 by 480 images), the hard disk option … [Read more...]
Hard disk (hard drive) construction
Hard disks are rigid platters, composed of a substrate and a magnetic medium. The substrate - the platter's base material - must be non-magnetic and capable of being machined to a smooth finish. It is made either of aluminum alloy or a mixture of glass and ceramic. To allow data storage, both sides … [Read more...]