Chapter 397 Super Large Capacity and Speed

For programmers, the file system is a software problem. A good file system can bring great performance optimization to the whole system. Wundaw's file system was originally a FAT series, such as FAT16, FAT32, and later an upgraded NTFS, while the LINUX file system is in EXT format. Their systems have their own advantages and disadvantages, but the basic principles are not much different.

The data in the file system is stored on the hard disk.

If you want to design a file system, it must be inseparable from the physical hardware structure of its storage device - the hard disk.

In the early days of the computer, there was no hard disk structure. The computer was programmed with punched paper, programmed on the punched paper, and then inserted into the reading device. After going through it, the computer reads the program into the memory, and then handed it over to the CPU for execution.

Later, disk tape appeared, which was a huge leap for computer storage devices. The data that a tape can store is even in GB, and the data is extremely reliable. It can be stored for at least 20 years and immediately becomes the main storage device for UNIX series host data backup.

Tape has survived for a long time as a storage device, and many different formats have appeared, such as QIC, 01TSR, etc.

In 1953, the IBM 701 computer used a new memory, the magnetic drum, using magnetic materials coated on the surface of the aluminum drum to store data. Due to the high rotation speed of the drum, the access speed is fast. It is the emergence of the magnetic drum used as internal memory, laying an important technical foundation for the disk.

Before the disk appeared, there was also a transitional storage device, which was the magnetic core. This was the idea put forward by American physicist Wang An in 1950 to use magnetic materials to make memory, and then Forrest turned this idea into reality. Magnetic core storage has been the standard method of computer main memory from the 1950s and 1960s to the early 1970s.

In the early 1970s, floppy disks also appeared in everyone's eyes as a convenient storage device. This is actually the product of the new tape equipment developed by the IBM storage device department. Because of its convenience, floppy disks and floppy drives later became the standard configuration of microcomputers. Until now, floppy disks are still Use.

In fact, as early as 195, the world's first mechanical hard disk memory was invented by IBM, and its model is IBM RAURAC. The total capacity of this system is only B, and a total of 50 disks with a diameter of 24 inches are used. Its volume is the size of two refrigerators, which is really a huge thing.

That's right, it's IBM again. This company is indeed a very great company, which has a profound impact on the development of computers. It can be said that without IBM, it may take a long time for computers to reach today's level.

Compared with the tape, magnetic drum and magnetic core technology that were already popular at that time, this huge hard disk is like a toy, a bulky primitive dinosaur, but the technology used is another leap.

In the history of computers, all devices basically follow a principle from large to small. First, scientists make the prototype of the equipment to prove its feasibility, and then continuously optimize and miniaturize the prototype, and finally enter the practical stage.

The structure of the mechanical hard disk is roughly composed of a disk and a head. The disk keeps rotating. If the head does not move, it can draw an invisible track on the disk. The information on the disk is stored along such a track, and the head reads the technology above. It is magnetoresistance and giant magnetoresistance technology. The improvement of its sensitivity directly leads to the improvement of the storage capacity of mechanical hard disks.

If Lin Hong wants to realize a storage device, he can't create a disk structure that tells the rotation in his brain, and he can't make a super sensitive head that can be addressed at any time.

However, it doesn't matter. In addition to the mechanical hard disk, there is also a kind of hard disk, that is, solid-state hard disk. This is a hard disk composed of a control unit and a storage unit. In short, it is a hard disk made of a solid-state electronic memory chip array. This kind of hard disk actually appeared in the late 1980s, but for various reasons, it still stays in the laboratory and has not been popularized and commercialized.

There are two kinds of solid-state drives. One is to use the FLASU chip as the storage medium, which can save data without power supply. The other is to protect data security based on the power supply that must be dedicated to DRAM. These two technologies, to put it bluntly, are the further upgrade of the previous ROM storage technology and memory technology to expand their capacity.

The characteristic of a solid-state drive is that the access speed is fast, its speed is comparable to that of memory, and its speed can be imagined. The disadvantage is that its manufacturing cost is also very high, much higher than that of mechanical hard disks, and its commercialization process is very slow.

Lin Hong is very concerned about these new technologies. One of his interests is to understand and study these high-end technologies that are still in the laboratory. Because these technologies represent the future development direction according to the development speed of the electronics industry, these things are likely to become a reality in the next five to ten years.

Lin Hong can't make a mechanical hard disk in his "sky eye", but he can make a solid-state hard disk. In fact, the manufacturing process is not much different from that of other hardware structures, and it is even simpler, because these structures are basically the same, as flat as a plain.

Lin Hong estimated that if switching protein is used instead of FLASH chip, its hard disk density can exceed 11B square inches, 11B, that is, 1B. This capacity is quite amazing compared with the current hard disk storage devices, because the hard disk density that is now in the laboratory stage. The maximum is also maintained at the level of GB ordinary inches, which is only one-tenth of a dozen.

Moreover, this storage structure can be used not only as a hard disk, but also as memory.

Because its data read and write speed is very fast, the mechanical hard disk cannot be compared with it at all. Because the solid-state drive does not have a magnetic head, it does not need to consume the addressing time, which is directly the light speed transmission of the signal. Now the access time of those memory in the laboratory is about 8 nanoseconds, and the transmission speed in the brain is far lower than this speed. According to Lin Hong's estimate, it is only a few percent.

Due to the particularity of the biological structure, Lin Hong does not need to use a flat structure like traditional solid-state hard disk manufacturing, but can use a three-dimensional way to curl the entire hard disk to form a three-dimensional structure. In this way, the volume occupied is quite small. It can fully meet his needs.

If he wants to construct the file system, he must first create this hardware structure.

With the assistance of the timing circuit, his operation of switching proteins is now much more efficient than before.

Lin Hong first spent a few hours creating a small piece of storage area to use as a memory structure, and then began to write the most original instruction code into it. Its function is very simple, that is, to continuously generate switching proteins in order and initialize.

If you want Lin Hong to take the initiative to generate a duplicate storage area without listening, the project is too big. It's not like making a CPU. Each part of the CPU is basically different. When doing it, you also need to use your brain and divide it into multiple parts one by one to complete it unconsciously. The storage structure is completely the same, which is a repetitive process, and the number is very large. If it is completely "manual", it will be life-threatening.

Fortunately, at this time, Lin Hong can already carry out simple programming on Tianyan. This process seems to be similar to the stage of the most primitive computer programming with perforated paper tape. Although there is no powerful operating system in it, it can execute simple programs.

Lin Hong first laid a foundation, and then let it execute automatically on this basis. It is equivalent to making a simple tool first, and then continuing to make a more precise lathe master bed. After the mother bed is manufactured, you can use it to make a more precise lathe.

After Lin Hong set the range and size, he did not care about it. He directly let it automatically and repeatedly generate switching protein in it, and initialized it as a storage structure.

Next, his superbrain system is a very critical step - to install the VC1 version of LINX. In order to distinguish it from the LINX on the computer, he named the system 81INXB, which is the acronym of the brain.

In order to adapt to the hardware structure of the "sky eye", in addition to the kernel, a lot of peripheral code must be rewritten, and the driver must be written according to the actual situation. Of course, the performance of 81INX is definitely much higher than that of INX, which is directly determined by the hardware structure and has no comparison at all.

Since the development environment in the "Tianyan" superbrain system has not been set up, Lin Hong can only develop 81INX under his modified LINUX platform, and then use vortex technology to transmit it to "Tianyan".

During the Spring Festival, Chinese people are most busy visiting relatives, but neither Lin Changming nor Feng Wan have this headache. Lin Changming's relatives have never seen a shadow. It is said that there are still some, but they have run to Taiwan W. On Feng Wan's side, they had just returned from North J and had already said that they would not go there.

So there is only the movement between relatives, friends and colleagues, which basically have nothing to do with Lin Hong. Therefore, from the first day of the Chinese New Year to the fourth day of the Chinese New Year, he was also called a super otaku. Unless he ate, he spent it in his room.

Although he is at home, he is focused and the efficiency of doing things is very high. His Tianyan hard disk is coming to an end today, and the transformation of 81INX is the same. It is just right time to install the super brain system when the hard disk is completed.