bit-tech: "For some reason, it's difficult to work up any excitement about hard disks. While lots of aspirational drool is lavished on graphics cards and CPUs, the faithful hard disk is often seen as the tedious and functional part of a PC. This is a damn shame, because it’s an ingenious bit of engineering.
Of course, it doesn’t help that they’re usually housed in an uninspiring silver brick, but if you’ve clung onto an old hard disks you don’t use, it’s worth installing an OS on it and flipping off the top to see what makes it tick. You soon realise that inside that dreary box is a wonder of the modern world. The head skates over the platter with clinical precision, fishing out tiny sectors in oceans of gigabytes."