The size of this thing? 400-sq ft space required, and only 6,200lbs. In 1959, we had 50 disks, each 24' in diameter, continuously spinning at a speed of 1200RPM, capable of storing 6MB of data (a staggering 12MB if your company opted for the double-capacity versions). Remember the IBM RAMAC series? Many of you probably do not. While it is true that initial production of 2.5' drives were problematic, so were 3.5' drives when they were initially released. First, let's take a look at some of the myths that 2.5' drives have associated with them verus their 3.5' sizes, and include a few not-so-mythic factors.Ģ.5' drives are smaller, making the data information more susceptible to failure.

Prices usually push the consumer into a buying decision, but there are many other factors which have contributed to the desire for 2.5' computer systems. 2.5' (9.5mm) hard drives have been slowly increasing in demand over the past few years.