The ability to increase the capacity of the hard disk
The first wave of information tsunami is already hanging over us, and in order to meet it at the ready, engineers are already proposing new approaches that could drastically increase the capacity of hard drives.
By 2015, the current hard drives in their development should reach the ceiling. We can only hope that during this time there will be some new ways to push more and more heavy files into the hard drive. During the development of hard drives, the recording density managed to grow by three orders of magnitude - from 10 MB to about 10 GB per cm². The relatively modern technology of "perpendicular recording" allows you to further increase the placement of information. However, consumers will soon lack capacity for storing video files, commercial information and scientific data. The development of hard drives is not keeping pace with the needs of customers, so that engineers have to look for fundamentally new ways in order to satisfy the growing appetites of the public.
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1. Using a laser
With this technique of magnetic recording, the laser is used only to heat a tiny portion of the disk on which the magnetic recording is currently applied. As a result of such heating, a record with a higher signal-to-noise ratio remains on the disk, and the rapid cooling of the heated sections “fixes” the recorded recording, reducing interference during reading.
2. Two-dimensional rings
Now the data is applied to the disk along the tracks, which are concentric rings. Part of the disk area is wasted. It would be good to get rid of these losses, putting paths close to each other. If the write / read head could clearly identify each track ignoring the interference between the fields of different tracks, the capacity of the disk could be increased.
3. Formation of the bit structure
Ferromagnetic kernels covering the disk can be arranged in the form of an ordered structure — for example, a sequence of islands 10 nm in size. Such a mosaic could be melted into the disk using an electron beam. A disk formed by this principle would become a repository of much larger amounts of information.
Here is another interesting article about the development of technology for recording on a magnetic disk.
By 2015, the current hard drives in their development should reach the ceiling. We can only hope that during this time there will be some new ways to push more and more heavy files into the hard drive. During the development of hard drives, the recording density managed to grow by three orders of magnitude - from 10 MB to about 10 GB per cm². The relatively modern technology of "perpendicular recording" allows you to further increase the placement of information. However, consumers will soon lack capacity for storing video files, commercial information and scientific data. The development of hard drives is not keeping pace with the needs of customers, so that engineers have to look for fundamentally new ways in order to satisfy the growing appetites of the public.
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Three ways to significantly increase the capacity of the hard drive
1. Using a laser
With this technique of magnetic recording, the laser is used only to heat a tiny portion of the disk on which the magnetic recording is currently applied. As a result of such heating, a record with a higher signal-to-noise ratio remains on the disk, and the rapid cooling of the heated sections “fixes” the recorded recording, reducing interference during reading.
2. Two-dimensional rings
Now the data is applied to the disk along the tracks, which are concentric rings. Part of the disk area is wasted. It would be good to get rid of these losses, putting paths close to each other. If the write / read head could clearly identify each track ignoring the interference between the fields of different tracks, the capacity of the disk could be increased.
3. Formation of the bit structure
Ferromagnetic kernels covering the disk can be arranged in the form of an ordered structure — for example, a sequence of islands 10 nm in size. Such a mosaic could be melted into the disk using an electron beam. A disk formed by this principle would become a repository of much larger amounts of information.
Here is another interesting article about the development of technology for recording on a magnetic disk.
© You will know too much ... ( popmech.ru )Source: https://habr.com/ru/post/82238/
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