Sony got a semiconductor laser and directly let the capacity of the mechanical hard disk take off.
15TB becomes 30TB in seconds
To put it simply, this semiconductor laser is a laser diode, which is mounted on the head of the HDD hard disk to write and read information.
Diodes? Head?
I guess some classmates will be confused.
Here are a few words about the internal structure of HDD (those who know it will skip it directly).
The interior of an HDD drive consists of several parts: a rotating platter, a read/write head, and a robotic arm.
A platter is a round disk with a magnetic coating covering the platter, which allows the surface of the platter to be magnetized, and when reading and writing data, the reading and writing head measures or magnetizes the magnetic field on the surface of the platter to read or write data. These magnetic fields are converted into digital electrical signals through the core of the magnetized head, which are then transmitted to a computer or other electronic device. The platter also rotates on the spindle to help speed up reads and writes.
To put it bluntly, it's when you see it on a computer screen.
The HDD is constantly thrusting and squeaking.
Back to semiconductor lasers.
It was developed by Sony and Seagate to mount it on the HDD hard drive to write and read information head.
*This allows the laser to be emitted at a point of one millionth of a millimeter.
Now, a green light.
It also allows the laser to touch the storage area on the surface of the disk at 400 degrees or more.
This allows more data to be written in the same block.
As a result, the hard disk can increase the data storage capacity.
Let's take an analogy. From the point of view of storage capacity, 3The capacity of the 5-inch HDD can reach 30TB, which is twice as large as before.
* The house where the young lady lives remains the same, but the young lady who lives in it has doubled.
I believe some friends will think that it's 2024, why not use SSD?
Indeed, HDD hard drives have been around for decades and used to be a must-have for installations, but in recent years, with the rise of SSD hard drives, many people have stopped buying mechanical hard drives.
Except for being expensive, there are almost no disadvantages.
Since they don't need to wait for any moving parts to read or write data, the controller only needs to receive instructions from the computer processor to start reading or writing data.
*This is also the reason why SSDs are faster than HDDs, but there are also schools of thought that SSDs will never replace HDDs.
Some time ago, Toshiba executives said that SSD hard drives can never replace mechanical hard drives.