Disk Drives Explained
CowboyRobot writes "Magnetic disk drives are one of those things I usually take for granted without thinking about, but I recently realized how little I understood about how they really work. ACM Queue has an article from their 'Storage' issue titled, 'You Don't Know Jack About Disks', which does a very good job of explaining exactly how magnetic disks have evolved since the 70s and how they work today."
Wrong. Found in many places on the Internet: like here in this GC FQA: it's not true that GC disks spin backward. You can check it out youself. Instead the CD starts at the outer part of the disk and the laser then moves towards the inside. Normal CD-ROMs and DVDs start at the inside and go outside (and slow down while doing that).
Well, there's an interesting article about hard drives here. Watch out, though, it's quite long and it's an easy way to waste some hours... But sure you wanted to know why we don't need to park the hard disk's heads anymore? =) Or, that in fact, there are holes in the hard drive, so it can "breathe".