Recover data from a diskpart > clean command

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  1. Posts : 42
    Windows 10 Pro (64-bit)
    Thread Starter
       #91

    I'll do it and ill be careful :)
      My Computer


  2. Posts : 42
    Windows 10 Pro (64-bit)
    Thread Starter
       #92

    First it gave me an error which I suppose is due to my disk being USB connected. Then it showed the results almost within seconds. Pasting the screens below.

    Recover data from a diskpart > clean command-error.png

    Recover data from a diskpart > clean command-snap.png
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  3. Posts : 562
    Windows 7 Ultimate x64
       #93

    That is bad news. Backup boot sector is also seems to be wiped and that is why "TestDisk" and "Partition Wizard" deep scans failed to detect a partition. To my knowledge, undeleting the partition is impossible at this point. However the NTFS MFT will be hopefully there without damage. Most of the data recovery tools will be able to recover files with original names and folder structure.

    Let's examine whether DMDE can reconstruct the file system. Please follow the below steps.

    1. Press the NTFS search button. On the next window, choose "Search".



    2. DMDE will now search for a valid NTFS file system. You will see a a window similar to the below example with progress shown in the bottom.



    This will be a sector by sector search so will take time to complete. After it completes, take a screenshot and upload with the next reply. Also use the "Save" button and save the search result in a local folder with a name of your choice.
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  4. Posts : 10,796
    Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
       #94

    If it finds the $MFT mirror it can reconstruct the original $MFT. Afterwards you can regenerate the boot sector and backup bootsector from the MFT. Testdisk can do that!
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  5. Posts : 7,024
    Windows 7 Home Premium 32 bit
       #95

    To add to what has already been decided (that the screenshot of Sector 2048 in post #85 is not a NTFS/Volume Boot Record/Partition Boot Record) here is how a normal NTFS record will show in Bootice . This is just by way of information to all those interested and following this thread.Supplements Kaktussoft's post#86 with a real life sector map.

    Recover data from a diskpart > clean command-24-06-2014-13-40-35.jpg

    NTFS Flag 4E 54 46 53 MBR Boot Record Signature: 55 AA
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  6. Posts : 562
    Windows 7 Ultimate x64
       #96

    If it finds the $MFT mirror it can reconstruct the original $MFT. Afterwards you can regenerate the boot sector and backup bootsector from the MFT. Testdisk can do that!
    Theoretically it is possible but for this to work a partition entry with correct values is required. I am still experimenting all possibilities by virtually recreating a damaged partition. Let's check whether DMDE can find the MFT entries and recreate the partition structure.

    @lonewolfs

    If DMDE found a valid entry after search completes, first save the search result, take snapshot and then click on "Open Volume". Then check whether your original folder structure can be seen like in the below example.




    Make sure to not open the volume until the search finishes.
    Last edited by Anshad Edavana; 25 Jun 2014 at 14:23.
      My Computer


  7. Posts : 42
    Windows 10 Pro (64-bit)
    Thread Starter
       #97

    Hi Anshad, Jumanji and everyone

    Sorry it took sometime for me to finish the scan but here it is ...

    Please advice me on how to go ahead

    Recover data from a diskpart > clean command-dmde_final.png
      My Computer


  8. Posts : 42
    Windows 10 Pro (64-bit)
    Thread Starter
       #98

    I opened the volume as it said the first one NTFS 0 in my previous post and this one exactly has my the directory structure I intend to recover. Also having kept a lot of patience I am really glad to see the directory structure back :)

    Once more sorry for the late response and I won't do anything in haste right now and wait for your instructions. This is very important that I recover this data :)

    Pasting a snapshot below... and thanks a lot for all the help.

    Recover data from a diskpart > clean command-dmde_filesystem_c.png
      My Computer


  9. Posts : 562
    Windows 7 Ultimate x64
       #99

    Great. I really appreciate your patience and willingness to follow instructions :).

    Yes, it is possible to recover the partition as DMDE confirmed the start sector as 63. Basically what we are going to do is ;

    1. Rebuild partition table with found values.

    2. Rebuild NTFS Boot sector and backup boot sector.

    3. Use CHKDSK to fix the damage caused by DISKPART ( zeroed 1985 sectors between LBA63 and LBA2048 - these sectors may probably contain Index allocation info ).

    I would say 90% chance for success and 10% chance for partiality data corruption. If you are ready to take the risk, i will post step by step instructions.
      My Computer


  10. Posts : 10,796
    Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
       #100

    Anshad Edavana said:
    Great. I really appreciate your patience and willingness to follow instructions :).

    Yes, it is possible to recover the partition as DMDE confirmed the start sector as 63. Basically what we are going to do is ;

    1. Rebuild partition table with found values.

    2. Rebuild NTFS Boot sector and backup boot sector.

    3. Use CHKDSK to fix the damage caused by DISKPART ( zeroed 1985 sectors between LBA63 and LBA2048 - these sectors may probably contain Index allocation info ).

    I would say 90% chance for success and 10% chance for partiality data corruption. If you are ready to take the risk, i will post step by step instructions.
    It did find the $MFT. NTFS bootsector and backup boot sector can be reconstructed with that information. 1985 sectors are overwritten.... less than 1MB.

    Step 1 and 2 won't hurt at all. Step 3 fixes the problems. It doesn't make things worse in my opinion.
    Last edited by Kaktussoft; 11 Jul 2014 at 12:49.
      My Computer


 
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