The data-storage capacity of the hard disk may soon increase up to 40 terabytes (TB) and beyond, says Western Digital.
Currently the largest hard disk drive (HDD) that stores data on spinning disks can hold approximately capable 14tb of information.
Western Digital said the larger units were made possible by finding a way to use the microwave to write data on 3.5 units.
The first large capacities expected to go on sale in 2019.Hot stuff
While solid state drives are popular with home users, many large corporations and web companies that fill their data centers with the discs that depend on moving parts, because, high-capacity, they are much cheaper and last longer. The unit of data to be stored on disks or disks that rotate at high speed.
A disk with a capacity of 40 terabytes would be able to contain more than 2,500 in a two-hour movie encoded at standard resolution.
Western Digital has said that it could produce the big unit, as he had found a way to increase the density of data recorded on a disk by using the microwave – a technique known as microwave-assisted magnetic recording (MAMR). The company is the first to produce a disk using this technology.
An allied method that uses heat instead of microwave it was thought to be the best way to help Hdds grow in capacity, but is known to be an expensive and technically difficult way to increase the data density. The resulting devices, in which the dishes are regularly to be heated beyond 400C, may also suffer from reliability problems.
Heat-assisted magnetic recording requires also an adjustment of the systems of production and the materials used for the magnetic discs that contain data. By contrast, MAMR requires many fewer changes to production and collaborates with the materials currently used to make Hdd.
In a statement, Western Digital said that it had produced the prototype MAMR drive this year, and would have given engineering samples to key customers in 2018 and to start volume production in 2019. By 2025, a further refinement of the technology push capacity past 40TB, he said.
He added that a new method of increasing the capacity of data was necessary, as it has been increasingly difficult to squeeze more data into the Hdd by using the existing techniques.