How to retrieve lost data

After decades of security attack baptism, enterprises have launched a counterattack against various viruses, hackers, worms, and malware. The network is secure and the server is secure, but the background data is still in high risk. Hardware and software faults and human error may cause data loss. Data loss is a constant crisis. How can we retrieve lost data?

The prevalence of viruses, Trojans, and malware has made people pay special attention to security issues. enterprises are investing more and more in security. The popularity of anti-virus software and hardware products is also evident. People often forget their ultimate goal in the face of sudden changes. In the fight against viruses and Trojans, enterprises are full of energy, but ignore the core of enterprise informatization-data security.

Data loss disaster

"If data is in crisis, what is the significance of peripheral protection ?" John W. Thompson, CEO and chairman of Symantec, once said. "No one looks at databases while defending the city" is a typical mode of marginalized security, which completely ignores the core part of Information System Security-data. Although the crisis mentioned by John W. Thompson may focus on data protection and security, data loss is a security crisis that we always face. I once heard a friend say that because the database is not backed up, all the information is lost after a system error, and the IT manager resigned.

A bank expert said that if a fire occurs in a bank, everyone would not hug the cash chest, but ran out with a hard disk. Once data is lost, the consequences are unimaginable. This is definitely not a joke, because no one has ever doubted the value of data since the development of information technology. Hard Disks are valuable and data is priceless. This has long been a consensus.

As the hard drive manufacturing process continues to improve, the storage capacity of the hard drive continues to double, but the price is continuously decreasing. In the process of increasing hard disk storage capacity and decreasing prices, the storage costs of enterprises are obviously reduced, but in fact the mission of hard disks is also growing, because the value stored on the hard disk is getting bigger and bigger, once data is lost and the Recovery fails, it is easy to cause catastrophic impact to the Enterprise. If the data cannot be retrieved, it can be said that enterprises can be pulled back to the starting point, especially financial and production-related data.

Why data is lost?

Hard Disks are electronic devices, which may cause damage. Once the hardware is damaged, data will be lost for common users, because it cannot be read or backed up to other storage devices through normal channels. In addition to hardware damage, non-standard routine operations or misoperations may also cause data loss.

There are two main causes of data loss: hardware faults and software faults.

Data loss caused by hardware faults generally results in hard disks not found by the system. The system cannot be guided through the hard disk, but can be guided through other devices. The system often crashes or blue screens; system errors or crashes when reading or writing a specific file or running a specific software; access to some partitions is not allowed; access to the system is slow when the system is restarted.

The main causes of the above phenomena are: Partition Table damage, physical bad channels, head amplifier damage, head deformation, hard disk surface scratches caused by physical collision, magnetic arm fracture, chipset or other component damage.

Data loss caused by software faults generally results in files not being found. Files cannot be read and cannot be viewed through the corresponding software. files can be read and opened normally, but are garbled; the partition cannot be accessed, the disk reads and writes are incorrect, and the system prompts that the partition is not formatted, and the operating system cannot be started.

The main causes of the above phenomena are: virus infection, Trojans, accidental deletion, sudden power failure during file read/write operations, electromagnetic interference, accidental partitioning or formatting, and file loss caused by operating system errors, hard Disk Partition Table loss, logical Bad Sectors, etc.

In fact, whether it is a physical fault or a software fault, to a certain extent, as long as you pay more attention to the daily use, we can minimize the loss caused by data loss. For example, when detecting abnormal sound on the hard disk, you should pay attention to backing up data to other devices as soon as possible and replacing the hard disk as soon as possible. System errors and crashes when reading or writing a specific file or running a specific software are all symptoms of Hard Disk Physical Bad Sectors. Although many materials have mentioned how to avoid physical bad sectors, compared with our data, the cost of a hard disk can be said to be negligible. Why not do anything that can be prevented in advance?

Hardware faults (except Physical Bad Sectors) cannot be regarded as data loss in some ways, because even if the hardware is damaged, the data still exists on the disk surface, but we cannot read the data through the normal way. At this time, we can use some professional data recovery companies or hard disk maintenance companies to replace the corresponding damaged parts, while restoring the hard disk, our data will be restored. For hard disks that cannot be repaired by replacing parts, only professional data recovery companies should be invited to open the market and professional equipment should be used to restore data.

Software faults are relatively simple. If they are deleted or formatted by mistake, some professional data recovery software can restore the data. Of course, if you are aware of data protection at ordinary times and do a good job in backup, you can directly use the backup data for restoration after deletion by mistake.