Hard drives are getting bigger and bigger, a trend that leads to some technical challenges hard to overcome without user-noticable changes. The increase in hard disk size means that the areal density (the number of bits stored per square inch on the drive) also increases heavily, which is a good thing at first glance: The higher the areal density the faster the same amount of data can be read and written. Thus the drives not only get larger, they also get faster.
Larger, Faster And Less Reliable?