The world's first hard disk "RAMAC" has only 5 Mbytes

The capacity of dozens of gigabytes has become commonplace now, but at the beginning of starting GIGAZINE it is amazing that there is gigabyte class capacity! And I thought obediently ......

So, although it is now a hard disk that is installed besides the PC, the hard disk of IBM's "IBM 305 RAMAC" is the first one. It was developed in 1956, and the huge size of 50 24-inch disks. But capacity is only 5MB. Even with the current USB memory, there should not be a small capacity so far ....TechEBlog >> World's First Hard Drive - 1956

The number of revolutions is 1200 revolutions. If it is a 3.5-inch HDD for desktop now, it's about 7,200 revolutions, so it's one sixth.

Although it is only 5 MB, it is excellent in terms of capabilities, it seems that it was able to retrieve specific information in less than 1 second from 5 million letters of information.

IBM - History viewed by equipment - History map of storage devices [RAMAC] - Japan

Moreover, this RAMAC seems to be about 1.5 sizes of vending machines.

【Column】 Silicon Valley 101 3rd Place where hard disk was born (MYCOM Journal)

In addition, it seems that this HDD was born on September 13, 1956 exactly.

ITmedia News: Starting from 5 Mbytes 50 years since the birth of HDD

In other words, September 13, 2006 is the 50th anniversary of HDD birth. Does IBM do some event?