Damage
Many of my friends after the data loss occurs, try self-healing, or find others to recover with recovery software, file recovery is out, but all or part of the file open. This is common, especially for routine repeatedly removed disk, a variety of high-definition camera memory cards, recover lost files, if using a general method to restore the effect is often not ideal.
Cause analysis and repair methods
Why on earth would not open it, the file name is the file size is right, the file date is right, "what is right", was destroyed header? Or how? Consider the following analysis.
Reason 1: The data coverage. After the hard disk or delete SD card or other causes of data loss, new data is written to the partition, there will be possible to cover the loss of data destruction, that is, the original code changes became other code, such coverage directly performance would not open the file recovered. Covering over data can not be repaired, such a document would have 1G of data, covering the 100M, 100M then this data is irretrievably lost, the remaining 900M data can be repaired open.
Reason 2: recoverable error. Some friends said, I do not have any data is overwritten, but why the recovery is still not open. This part of recovery software errors, the software did not properly restore data. If the data is fragmented storage, recovery after the loss of software generally will have this situation. For this situation, there is recovery experienced data recovery engineers will analyze the data and then manually programmed or manual defragmentation data recovery. A friend asked, the software will be wrong? Software recovers unsuccessful, you can manually restore success? Artificial difficulty is also worse than the software? In fact, the software is written according to the programming problems people encounter daily carried out, is some fixed set of statements to solve a certain kind of law issues. For some, there is no law problems have not encountered, the software will be wrong. Then you need to manually analyze the problem, and then a new programming process.
