Causes of data loss and data recovery case

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ó many causes leading to the loss of data and case, the ability to recover data will vary. In General, there are three main cause of data loss is: due to hardware failures, software errors, and user error

Causes of data loss and data recovery case

Series of basic knowledge articles and guide hard drive data rescue:

Tutorials and basic knowledge about hard drive data rescue – part 1
Causes of data loss and data recovery capability of each case-part 2
The best data rescue software-General and compare features-part 3
Experience in data recovery of hard drive, usb, delete, Format, Ghost wrong-part 4
Recover lost data on your hard drive, USB by Active @ File Recovery software-part 5
Data rescue deleted files, Format, mistaken by Ghost software GetDataBack Data Recovery-part 6
Usb hard drive save data are deleted, the Ghost in the wrong by DERescue Data Recovery Master-part 7
How to recover hard drive data Format, Ghost, Delete the wrong
The causes of data loss on your hard drive:

There are many causes that lead to loss of data, in general there are four main causes:

Due to virus sabotage or coding: the virus can corrupt data or viruses can encrypt your data to blackmail
Hardware error: this is the leading cause of data loss, accounting for 44%. Hardware error may occur due to abnormal electrical or physical damage of the storage device.
Software error: account for about 21%, caused by Virus, damage the operating system.
Error: porcelain people account for about 32%, caused by the use of improper manipulation as: delete, format or fdisk when not backup data …
Data recovery is the process of using the equipment or specialized software to search for lost data, should remember this is only a solution to minimize the damage, the data could not be restored completely as before.

1.4. The ability to restore data

The data being encrypted virus blackmail: a lot of file important documents like Word files (*.doc, *.docx), Excel (*.xls, *.xlsx), *. Pdf, *. Jpg … could not open with the data message had been encrypted and require the victim to pay to unlock the data. Refer to the how to decrypt and recover data that is encrypted virus here

Deleted files:

As mentioned above, the deleted files will delete marker in Director Entry and the relevant information in the table the FAT or MFT Entry. In theory, the ability to fully restore this file is high.

However, actual results are sometimes not as expected for a number of causes:

After deletion, the user tries to perform some operation to retrieve the data, new data overwrites the OS on the cluster is marked deleted.
The partition to be deleted (or recreate) but not the format (format): most of the data can be restored in this case because the FAT and MFT is not affected when users delete and create new partitions.
Device partition format:

With FAT partitions, formatting will delete Boot Record, FAT tables and root directory (the Root Directory) but the Partition Table and data in Allocation remains. These files are smaller than the size of a cluster (32 KB, the default FAT32 or according to your options when formatting), the file is restored completely as they do not need the information in the table FAT.

With the large capacity files, multiple consecutive cluster, they will be fragmented when content changes over time. The find and assemble the relevant cluster together is hard work, especially with large files and or changes.

Some data rescue software has the ability to recover information from the table without FAT. However, the contents of the file after the search will return incomplete or cannot be read. So, you will need a software capable of extracting the contents also read from these files.

With NTFS partitions, formatting will create new MFT, however the result is better restore FAT NTFS FAT tables used not because to identify the cluster contains data of the same file.

Device partition format and install new OS or use Ghost:

This case is really difficult because the Directory Entry (FAT), MFT (NTFS) has been deleted. Suppose you have 10 GB of data stored on a 20 GB partition, this partition be reformatting and copying 5 GB of data portability.

As such, you can not recover the data that has been overwritten copy which can only restore data from 5 GB to return later.

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