Often encounter in our data recovery work, "prompting you to format the partition" or "file directory structure is bad or corrupted" such failure, The reason for this is usually because the hard disk has bad sectors or damage caused by partition parameters.
Normally we start with a third-party tool to recover data after the first backup safety to repair the original equipment.
Chkdsk.exe is Command Line Interface CHKDSK program, we can use this command directly proceeds to a block at the command prompt, the program logic to verify the integrity of the file system. If CHKDSK logical inconsistencies found in the file system data, CHKDSK will perform the repair data file system operations.
All along the disk repair command (chkdsk) is one of our most effective command, but sometimes special circumstances can not use this command to repair the damaged partition file directory in question, as in this example:
Seagate 1TB mobile hard disk partition RAW cases, the cause of the failure in many cases to the file system directory damage or other logical problems. Normal process should first copy the data partition, then copy the data to be done to complete the overhaul of the failed partition the disk. But it does not guarantee a successful repair disk, directory, or file corruption partial damage may occur after the overhaul.
After the failed disk data copying is completed, its maintenance command, always found the following prompt:
Replace the computer, uninstall the hard disk and other methods to try no fruit, winhex view the partition, found no $ MFTMirr files in the directory browser, diagnosis reason may still be, and NTFS system metadata documents relating to, first locate the $ MFT and $ MFTMirr found in the $ MFT, the "volume" of the file number 3 ID loss is recorded before and after the recording to view the file found "volume" is offset due to the loss of file records, as follows: 
determining the file previously recorded 4 ID No. problem, the number 0,1,2 record written back to the normal position, copy partition from normal "volume" file to the appropriate location of the fault record Subdivision:
Save and exit partition can be found to open normal use, to ensure the normal and correct maintenance we again use the command found overhaul smooth, user data integrity: