Interesting facts about the hard disk

Form factor hard drives does not indicate the size of the case, and the diameter of the drive plate, which is traditionally marked in inches. Thus, the 3.5-inch HDD has a body width of 10 cm, ie 3.937 inches.

Over the years, the capacity of hard drives doubles every 12 months.

Toshiba hard drive form factor measuring 0.85 inches

Toshiba hard drive form factor measuring 0.85 inches

In 2004 by Toshiba at the Consumer Electronics Show was presented HDD form factor measuring 0.85 inches, which amounts to 4 GB. This model was entered in the Guinness Book of Records, and was later put into production.

Hard drives that use perpendicular recording technology information on 1 sq. cm to 155 Gbit converter that 60,000,000 times higher than 50 years ago.

The distance between the magnetic disk surface and the read head in HDD is 10 nm . For comparison, human hair has a thickness of 50,000 nm.

In 2007, Google campaign was analyzed 100,000 hard drives, where it was found that the highest lifetime demonstrates this type of storage at a temperature of 40 degrees, and that at this rate, adversely affects the temperature less than 30 degrees and more than 45 degrees.

Manufacturers to calculate the volume of the hard drive is used as a base for exponentiation number “10”. In this case, 1GB^9 is 10 bytes. For comparison, the computer is used as a base figure “2”, so 1 GB is 2^30 bytes. Consequently, the actual capacity of 250 GB HDD is about 232 GB.