From the source of computer noise, it can be summarized into three parts, namely fan noise, hard disk noise, optical drive noise. In addition, some computers also have resonant noise. Although the noise of hard disk noise is not directly measured by hard disk performance, he often hears a burst of hard disk, and it is not a pleasant thing. Throughout the development history of the hard disk, you can find that the noise of the hard disk is actually proportional to the speed of the hard disk: the speed is increased, and the noise level will be improved accordingly. Although the 7200-turned hard drive has improved, it has become the mainstream of the market, but the noise is still higher than 5400-turn hard drive. Usually there are two motors inside the hard disk, one is a spindle motor that drives the hard disk rotation. The motor has passed the main noise and heat source, but now there are many manufacturers to start using liquid bearing electric machines, which use mucosa liquid bearing, oil film Instead of the ball, it can effectively reduce the noise and fever problems caused by metal friction. At the same time, the liquid oil bearing can also effectively absorb the vibration, so that the earthquake resistance of the hard disk is improved, and the life and reliability of the hard disk can be improved. However, there is another way to find a motor, due to technical and cost, the motor has not used liquid bearing motor, and we usually hear the "answer, answer" sound from the hard disk, is from it. The speed of the spindle motor speeds, the search motor can only be coordinated, and the potential after the spindle motor is accelerated. At present, most hard drives are mainly caused by this seek motor, and different manufacturers' hard disk sound is different. In order to reduce the hard drive, the hard disk manufacturers are really "Eight Immortals", soft and hard, and make the respective killer. For example, in "hardware", a new type of liquid bearing motor is used to reform to the internal structure of the hard disk, using a gasket made of absorption vibration noise, sound insulation foam, etc. In the "software", the respective noise reduction technical solutions have been introduced. . Below we are generally teaching these methods. 1. The spindle motor of the liquid bearing motor technology drives the main shaft motor and the seek motor driven the hard disk, and is the root cause of noise. Early hard drive motors were Ball Bearing Motor. At that time, due to the low speed of the hard disk, the noise issued was not large. However, with the improvement of the hard drive speed, the ball bearing motor brings many problems such as wear, temperature rise, noise increases, and become the main source of hard disk noise, which is obviously not adapted to the development of the hard drive. In this case, hard disk manufacturers have launched hard drives with new liquid bearing motors. Fluid Dynamic Bearing Motors has been applied to the precision machinery industry, and its technical core is to use mucosa liquid oil bearings to replace balls in oil film. Compared to traditional ball bearing hard drives, the advantage of liquid bearing hard disks is obvious. One is the noise reduction and cooling. Avoid direct friction of the ball and the bearing metal surface to minimize hard disk noise and its heat generation; the second is to reduce the damping noise reduction. The oil film can effectively absorb the vibration, enhance the earthquake resistance of the hard disk; third is to reduce wear and improve the hard disk work reliability and service life. In 1996, Seagate produced the world's first FDB motor, and then launched the first hard disk product using liquid bearing motor, and the FDB motor has developed to the sixth generation. At present, the desktop hard disk manufacturers Mai Tuo, Seagate, Western data, Hitachi (formerly IBM hard drive), Samsung, etc., and laptop hard drive Fujitsu, Toshiba, IBM, etc., basically have liquid bearing hard drives. 2, other hard disk noise reduction technology deal with hard disk noise, in addition to the use of liquid bearing motor technology, major hard disk manufacturers have their own unique "Kung Fu". Let's take a look at the noise reduction technology of different brand hard drives.
(1) Seagate Hard Drive Noise Reduction Technique, Seagate's IDE hard drive almost became a synonym of a big noise hard disk, but all this has the launch of Barracuda ATA IV (Cool Fish four generations) hard drives, and the sound shield The application of technology (SBT) makes the Seagate hard disk turn into the most "quiet" IDE hard drive, and sound shielding technology includes the following: Softsonic LC Bearing: Softsonic Motor is the sound shielding technology of Seagate hard drive (SBT The core is also a technical breakthrough in obtaining a variety of computer users. When testing the industry standard, the noise sent by the Cool Fish ATA IV single disk model is only 2 Bell, and the noise in the seek is only 2.4 Bell, while the sound of the sound of the sound of the voice of the Bell is unaacked. . Seashield cover and soundproof foam: Seashield cover, the metal baffle of the hard disk circuit, the baffle and the soundproof bubble play a possibility of further reducing noise leakage. Turn rectification technology: By controlling the working current waveform of the spindle motor, making the motor's start-stop smoother. Silentseek technology: Mainly speed limit, acceleration restriction, current shaping and timely seeking method, because these techniques are more complicated, here is not described in detail. (2) MaxTor Hard Disk Noise Reduction Technology Since M & A Quantum, Mai Tuo's hard disk career is booming. In addition to applying its own noise reduction technology, Mai Tuo also has a number of technologies including QDT mute technology, and the integration of powerful technology has higher technical content and competitiveness. MAXTOR SILENT Store Technology: In fact, this is not a new technique. Mai Tuo has already proposed this noise reduction plan before, called "acoustic management", the principle of this technology is to join the control program in the BIOS chip of the hard disk. The reaction speed reduces the magnetic head power arm, which reduces the vulnerability, thereby reducing noise. Since this technology will make the performance of the hard disk slightly lower, plus a few years ago, or the 5400rpm hard disk accounts for the mainstream era, the noise problem is not very highlighted, so it is applied until the 7200rpm hard drive has become mainstream. For Mai Tuo hard drives that apply Silent Store technology, users can download the latest control programs on the official website of Mai Tuo --Maxtor's Amset Utility. Unzip the downloaded program to the floppy disk, then start your computer with the floppy disk, run the AMSET program. AmSet.exe has four parameters, named / quiet, / fast, / check, and / off, / quiet mode allows for a reduction in performance to reduce hard disk noise; / FAST mode allows for a slight replacement of noise with performance Falling, of course, the noise reduction effect is not as good as / quiet mode; / Check can check the current silent mode of the hard disk, / off, completely shut down the noise reduction function option, and the hard disk is run at best performance. QuitedRivetechnology (Quitedrivetechnology) This technology was a hard disk that Quantum was proud of the priests, but with the Queen Teng's acquisition, this excellent technology was naturally owned by Miao, this technology The noise of the hard disk can be controlled below 3.0 Bell.
(3) IBM hard disk noise reduction technology As a presenter of the Winchester structure, IBM has been in a very important position in the hard disk field, but since Tenglong's second generation begins, the hard disk rework rate is more High issues gave IBM on a shadow, now IBM sells the hard disk division to Hitachi Company, but in any case, the technical content of IBM hard drive is still undoubted. IBM Drive Noise Suppression System Noise Reduction Technique: This technique is applied to IBM's desktop hard drive. It is mainly included: Ceramic Spindle Motor, which can reduce operating noise, and modified voice coil motor. And reduce the tri-laminate top cover of noise outwardly. The application of these advanced technologies makes IBM Tenglong's four-generation hard drives only 3.1 Bell (3 dish) to 3.0 Bell (2 discs and below). Fluid Dynamic Bearing Technology: This technique is applied to the Deskstar 180GXP series hard drive released on October 1, 2002, which is the same as the Softsonic Liquid bearing technology of Seagate, which can greatly reduce hard disk noise. Automatic ACOUSTIC Management: This technology is similar to the Silent Store technology of Mai Tuo, which is to reduce noise by reducing the search speed of the hard disk. However, compared with Mai Tuo's voice management tool, IBM Feature Tool provided is not only gorgeous interface, but also powerful. It is a toolkit including a sound management tool that uses the sound management tool, allowing the hard disk to switch back in two working modes, one is a low noise quiet mode (Quiet seek mode), one is a high performance Normal Seek Mode, a significant decrease in noise by a little drop in hard disk performance. (4) Samsung noise reduction technology For Samsung hard drive, some users may not be very clear. By the end of 1999, Samsung hard disk production capacity reached 1.2 million months, but it was mainly supplied to the market in the form of OEM, so there was a fresh product of Samsung hard drive in DIY market. However, at that time, Samsung hard disk set up high performance, low noise, low working temperature, and enjoy a good reputation in the industry. At present, Samsung's hard drive has entered the Chinese market, mainly divided into 5400 rpm V-Series and 7200 rpm P-series. These two series of hard drives use Samsung unique hard disk noise reduction technology, and the mute effect is quite significant. Noise Guard: It mainly includes three aspects, first to add a sound insulation on the top cover further preventing the spread of internal vibration, followed by improving the design and structure of the top cover, reducing the noise generated by the spindle motor, and finally improve the spindle The motor design reduces the vibration generated during high speed operation. Silent Seek: The principle of this technology is to optimize the driver waveform of the trimming plurality of DSP (Digital Signal Processor), and the acceleration when the magnetic head arm is finding, and the noise of the voice coil At the same time, try to ensure that the vulnerability is not affected.
