April 27, 2004 12:55:03
The hard drive is the most important storage device in the computer system. Its capacity from the early 5MB to the current several GB or even more than 100 GB, from the ordinary electromagnetic induction head to the current MR magnetoresistive head or GMR giant resistance head, advanced technology The injection provides the best driving force for the rapid development of the hard drive. At the same time, the hard disk is used as a carrier of computer users and the carrier of information, which must require the reliability and persistence of data storage. Everyone knows that the data in the computer is reliable, in most cases, computer users carefully and even exceed the speed, the reason is very simple, if the various data saved in the same is lost from time to time, then what is the meaning of the speed? ? This is not as simple as hardware equipment, many times, many times, there is no way to make up for it after the user data is lost, and the major loss is inevitable. This seems to enhance the protection of user data is very important. This is also hard disk data protection technology we have to talk about today. First, S.m.a.r.t. Technology has been continuously improving the performance of hard disk in recent years, and many monitoring means for its operational status. Traditional measurement methods are called MTBF (Mean Time Between Failures, average fault interval time), which measures its stability by calculating normal running time between two failures. Now a general hard drive can reach a level of 300,000 hours, while high-end products may be more than 800,000 hours. However, the MTBF indicator still has a lot of shortcomings. Since MTBF is a static indicator, it is only for a batch of hard drives, which is not for a particular hard disk in a specific system, so individual differences in actual use may be more Big. Double the hard drive capacity, making every potential error brought more and more serious. Therefore, ensuring that the reliability of each hard disk becomes more important than before. In this case, S.M.R.T. (Self-Monitoring, Analysis and Reporting Technology) Since the monitoring, analysis, and reporting technology, it is officially established in the ATA-3 standard, and all hard drive vendors provide support to it. SMART technology can monitor heads, magnetic disks, motors, circuits, etc., analyzed by the monitoring software of the hard disk and the monitoring software on the host to analyze the operation of the monitored object, compared to the high security value. When the situation is outside, a warning can be automatically issued to the user. More advanced technologies can automatically reduce the running speed of the hard disk, transfer important data files to other security sectors or other storage devices, via S.M.R.T. Technology can effectively predict the potential failure of the hard disk, improve data security. It must be noted that S.M.A.R.T technology must be implemented by the BIOS setting of the motherboard, and the corresponding function can be implemented. In the past few years, some may be used for S.M.R.T. The system's technology has passed the joint research of many technicians, and now has entered the practical phase. The micro-analysis of the internal structure and components of the hard disk makes the hard drive designers understand many typical error mechanisms, which not only provides a good improvement plan for future design, but also gives us a predictive drive error Methods. Second, DATA LIFEGUARD Technology Data Lifeguard is a data protection technology provided by Western Data companies to support new hard drives that support Ultra DMA / 66 transport interfaces. It can use the hard disk without the idle time, automatically detect the data on the hard disk every 8 hours, and correct the error before the data has problems.
At the same time, it can automatically detect and repair the fault sector due to excessive use. Since the data guards are typically reserved on the hard disk, the data guard will automatically It is marked as a bad sector while writing a corrected data into the standby sector to protect the reliability of the data. The biggest feature of this technology is to completely automatically, no need to install the driver without user intervention. Third, the SPS and DPS Technology SPS (Shock Protection System) vibration protection system is developed by Quantum, applied to the product of the Fireball Seven Generation EX Series. It is aimed at the installation or other non-operative state, the hard disk may vibrate, hit the designed shockproof protection technology. In normal state, when the hard disk collides, it is easy to cause the magnetic head to fly and quickly, and the disk surface may be damaged or particulates in a pressure of several hundred g, resulting in damage or data loss in the hard disk. The SPS design principle is that when it is impacted, keep the head from vibration, the head and the magnetic head arm is parked on the disc, and the impact energy is absorbed by the other parts of the hard disk, which effectively improves the earthquake performance of the hard disk, so that the hard disk is transported, used and Maximize the damage of vibration during the installation process. DPS (Data Protection System) Data Protection System This is a Quantum Ball 8 generation hard drive, in addition to supporting Ultra DMA / 66 transmission interface, SPS shockproof system, the first built-in data protection technology. It uses a simple and effective way to provide the reliability and data integrity of desktop PC storage systems. DPS quickly automatically detects each sector of the hard disk and locates an important part of the operating system or other application system in the first 300m space of the hard disk. When there is a problem in the system, the DPS can automatically detect and restore system data in 90 seconds. Even if the system cannot be booted, it is also possible to start the system with a system floppy disk containing DPS, and then automatically detect and analyze the cause of the fault, as much as possible Not lost. If the error occurs in non-main partitions, all data of the hard disk can continue to be detected by DPS extension detection, and the length of time is determined according to the hard disk capacity, and it will not exceed 20 minutes. In addition, DPS can be compatible with his series and big foot series products such as fireball, that is, Quantum product users can use DPS data protection systems. Fourth, ShockBlock and MaxSafe Technology ShockBlock is the shockproof technology used on its gold diamond second-generation hard drive. Its design idea is similar to Quantum's SPS. Advanced design and manufacturing processes are used in unexpected collision, as far as possible Avoid impact on the surface of the head and disk surface, and reduce the surface of the disk caused. From a designed, there is a majority of the SHOCKBLOCK system to withstand persistent vibration and up to 1000g impact, which reduces risk to a minimum. MaxSafe is also the unique data protection technology of the gold diamond second generation, which can automatically detect, diagnose, and correct hard disk problems, providing higher data integrity and reliability. The core of the MAXSAFE technology is the ECC (ERROR CORRECTION CODE error correction code) function, which uses a special coding algorithm during the data transfer process, adds additional ECC inspection bit code and saved on the hard disk, when the data re-reads or writes The additional inspection bits and the original saved data control are removed by decoding. If an error occurs during the coding and decoding process, the data is rereaded and the integrity of the data is retracted. In addition, MaxSafe also supports high-fly write detection function. When data is written, it automatically detects and guarantees that the magnetic head is averages a millionth, ensuring continuity and correctness of writing. .
