Generate background
As the capacity of a single disk of hard disk becomes larger and larger, the head technology becomes more and more sensitive, and the flight altitude of the magnetic head becomes lower and lower. What is not only increasing is capacity and performance, but also the risk of data storage is also slowly increasing. In order to achieve higher single disk capacity, the memory cells on the disk are constantly shrinking and the data signal becomes weaker and weaker. Although the system can recognize these weak signals by improving the sensitivity and flight altitude of the magnetic head, the possibility of these signals being disturbed by external signals is increasing. In addition, the disk and magnetic head that are closer and closer are also increasing the chance of collision between each other during high-speed rotation. The security of data is becoming increasingly worrying.
At this time, whether the data on the hard disk is safe has become a problem that every user must be concerned about. At the same time, it is also a concern for every hard drive manufacturer. (Self Monitoring, Analysis and Reporting Technology) The introduction of technology is to solve this problem.
concept
Since our data is currently mainly stored on the hard disk, ensuring that the hard disk does not fail is the foundation for protecting the data. It is a general security technology that is commonly used by most hard drives. When you start the machine, you can see this option (see Figure 1). By detecting magnetic heads, disks, motors, control circuits and other devices, it can have certain predictive capabilities for non-burst hardware failures. The new technology also introduces the concept of weakening failures to delay the onset of failures and provide users with sufficient time. In fact, 60% of hard disk failures are mechanical, S. Ｍ． A. Ｒ． T can show off his skills for this part of the fault.
Figure 1 BIOS settings screen
Currently, the hard disks produced by different manufacturers are different, S. Ｍ． A. Ｒ． The implementation methods of T are also different, but they share common basic requirements. First, there must be a supported drive; second, there must be an operating system that supports command execution, such as the popular Windows 9x series. In addition, there is also an application that can display alarm information. On this basis, various manufacturers have developed their own unique hard disk protective firmware. The better ones include WD Data Guard, Quantum's DPS and SPS, Maxtor's Maxsafe and ShockBlock, Seagate Seashield, DST and IBM's DFT technologies. They have been extended to varying degrees on the basis of each, making hard disk data more secure.
Technology is a cheap data protection that pre-issues hard disk failures. It is precisely because of its inexpensiveness that it can be popularized. We hope that users can use this resource to complete the primary protection of data at the lowest cost.
Safety hazards
We know that all hard drives now support it, which is a self-monitoring, analysis and reporting technology. Its development has gone through three versions. Ⅰ Only the errors that occur during hard disk operation can be calculated accumulated, and a safety warning will be issued when the errors are accumulated to a certain number of times. Ⅱ Improves the error prevention system and can automatically perform read and scan the hard disk beyond the system operation instructions. This is a big step from I. Usually, where the magnetic head is not read and written, it can be detected and reported.
Now the technology has reached the third generation. III can not only automatically read and scan the hard disk, but also cumulatively generate a security warning after the number of errors reaches a certain number of times, but also add an ECC (Error-Correction Code) error correction function to perform ECC correction of errors occurring during disk work and automatic read and scan. However, even for III, the monitoring of disks and data protection are not comprehensive enough. Because only read scans can be performed for sectors, and the sector status cannot be written back tests. And the errors that cannot be corrected by ECC cannot be resolved. Therefore, relying solely on technology is not enough.
In response to this problem, in addition to making their products meet, each hard drive manufacturer has launched its own unique data security protection mechanism. The most advanced and effective one is Data Lifeguard technology of Western Digital hard drive.
As the capacity of a single disk of hard disk becomes larger and larger, the head technology becomes more and more sensitive, and the flight altitude of the magnetic head becomes lower and lower. What is not only increasing is capacity and performance, but also the risk of data storage is also slowly increasing. In order to achieve higher single disk capacity, the memory cells on the disk are constantly shrinking and the data signal becomes weaker and weaker. Although the system can recognize these weak signals by improving the sensitivity and flight altitude of the magnetic head, the possibility of these signals being disturbed by external signals is increasing. In addition, the disk and magnetic head that are closer and closer are also increasing the chance of collision between each other during high-speed rotation. The security of data is becoming increasingly worrying.
At this time, whether the data on the hard disk is safe has become a problem that every user must be concerned about. At the same time, it is also a concern for every hard drive manufacturer. (Self Monitoring, Analysis and Reporting Technology) The introduction of technology is to solve this problem.
concept
Since our data is currently mainly stored on the hard disk, ensuring that the hard disk does not fail is the foundation for protecting the data. It is a general security technology that is commonly used by most hard drives. When you start the machine, you can see this option (see Figure 1). By detecting magnetic heads, disks, motors, control circuits and other devices, it can have certain predictive capabilities for non-burst hardware failures. The new technology also introduces the concept of weakening failures to delay the onset of failures and provide users with sufficient time. In fact, 60% of hard disk failures are mechanical, S. Ｍ． A. Ｒ． T can show off his skills for this part of the fault.
Figure 1 BIOS settings screen
Currently, the hard disks produced by different manufacturers are different, S. Ｍ． A. Ｒ． The implementation methods of T are also different, but they share common basic requirements. First, there must be a supported drive; second, there must be an operating system that supports command execution, such as the popular Windows 9x series. In addition, there is also an application that can display alarm information. On this basis, various manufacturers have developed their own unique hard disk protective firmware. The better ones include WD Data Guard, Quantum's DPS and SPS, Maxtor's Maxsafe and ShockBlock, Seagate Seashield, DST and IBM's DFT technologies. They have been extended to varying degrees on the basis of each, making hard disk data more secure.
Technology is a cheap data protection that pre-issues hard disk failures. It is precisely because of its inexpensiveness that it can be popularized. We hope that users can use this resource to complete the primary protection of data at the lowest cost.
Safety hazards
We know that all hard drives now support it, which is a self-monitoring, analysis and reporting technology. Its development has gone through three versions. Ⅰ Only the errors that occur during hard disk operation can be calculated accumulated, and a safety warning will be issued when the errors are accumulated to a certain number of times. Ⅱ Improves the error prevention system and can automatically perform read and scan the hard disk beyond the system operation instructions. This is a big step from I. Usually, where the magnetic head is not read and written, it can be detected and reported.
Now the technology has reached the third generation. III can not only automatically read and scan the hard disk, but also cumulatively generate a security warning after the number of errors reaches a certain number of times, but also add an ECC (Error-Correction Code) error correction function to perform ECC correction of errors occurring during disk work and automatic read and scan. However, even for III, the monitoring of disks and data protection are not comprehensive enough. Because only read scans can be performed for sectors, and the sector status cannot be written back tests. And the errors that cannot be corrected by ECC cannot be resolved. Therefore, relying solely on technology is not enough.
In response to this problem, in addition to making their products meet, each hard drive manufacturer has launched its own unique data security protection mechanism. The most advanced and effective one is Data Lifeguard technology of Western Digital hard drive.