Results 1 to 5 of 5

Thread: NTFS signature missing...

Hybrid View

  1. #1
    Join Date
    Apr 2007
    Location
    USA
    Beans
    58
    Distro
    Hardy Heron (Ubuntu Development)

    NTFS signature missing...

    I had a 1.5 TB drive that I rescued using ddrescue. My first attempt was to an image file... and it worked well enough, but I ran out of room (but that image file would mount and I could copy some files off).

    I then went back and rescued again, this time from drive to drive so I would have enough room and be able to do all the ddrescue passes. ddrescue ran great and completed without any issues (other than the bad sectors of course).

    I can't mount the physical drive. It complains that the NTFS signature is missing. ntfsfix can't fix the problem (it complains about no signature and some other errors, basically says the drive is corrupt). But if I use testdisk, I can see the files on there....

    Is there a way to fix the NTFS?

    SUMMARY:
    You can try testdisk, but you will likely have to use microsoft's chkdsk..... Or perhaps a combination of the two.
    Last edited by ccw127; March 27th, 2013 at 01:53 AM.

  2. #2
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: NTFS signature missing...

    Another external with similar issue.
    http://ubuntuforums.org/showthread.php?t=2129275

    Are you sure you partitioned drive before writing data to it?

    The NTFS signature is the PBR or partition boot sector. All NTFS partitions have to have a valid NTFS boot signature even if not used for booting. It also has the same info on start & size of partition as the partition table.

    What does testdisk show?
    repairs including testdisk info & links
    http://members.iinet.net.au/~herman546/p21.html
    https://help.ubuntu.com/community/Da...st%20Partition
    https://help.ubuntu.com/community/DataRecovery

    repairs including testdisk info & link to testdisk, testdisk is in repository and on most repairCDs
    http://members.iinet.net.au/~herman546/p21.html
    http://www.psychocats.net/ubuntucat/...rdeletedfiles/

    As described, it has an option to "Recover NTFS boot sector from its backup"
    If Backup BS isn't available, choose RebuildBS.
    Instructions
    http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step
    http://www.cgsecurity.org/wiki/Menu_Analyse
    http://www.cgsecurity.org/wiki/TestD..._file_for_NTFS
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #3
    Join Date
    Apr 2007
    Location
    USA
    Beans
    58
    Distro
    Hardy Heron (Ubuntu Development)

    Re: NTFS signature missing...

    Using testdisk to fix the PBR fixed the issue. The main record was fine, but it said the backup with corrupt. I restored the backup from the main, and all (mostly) was well. I had seen options to repair the boot info, but ignored it because I didn't realize the NTFS info would be there as well.

    Now the last problem (I hope)...

    I am now finding all the files that were at least parially residing in the bad areas of the old drive. While searching I am coming across files that throw and I/O error upon reading (or me trying to manually delete). I checked, and the new drive throws no errors in dmesg, and smartctl shows the health as fine (as far as a seagate drive ever looks 'fine' in smartctl.... I will never buy another seagate.... ).

    Should I just run some ntfs checks on the drive? What could cause this as the drive is phsically fine (new/ refurb, just imaged from a bad drive).

    Thanks for all the help so far.

  4. #4
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: NTFS signature missing...

    If you copied bad data, I am not sure anything can fix it. Normally chkdsk will not hurt anything, but if it sees errors it cannot fix it writes files to its chkdsk temp folder and once in a while it goes bersek and trys to copy a lot. But chkdsk is the only way to repair a Windows NTFS drive with corruption, usually after every power failure.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  5. #5
    Join Date
    Apr 2007
    Location
    USA
    Beans
    58
    Distro
    Hardy Heron (Ubuntu Development)

    Re: NTFS signature missing...

    No, I'm sure the files are garbage... They were partially or wholely in bad sectors.... My current issue is I can't delete them from the new disk (i get I/o error messages )


    UPDATE (Solved):

    So I tried to play around with testdisk a couple more times and used about every option available to me in there... Nothing. Finally broke down and used a Windows 7 repair cd to run chkdsk from. It fixed some issues it found and exited normally. Drive seems to be working correctly now. I can access and delete files that before were throwing the I/O errors before. Now I get to sift the recovered files and slowly migrate over to a ext3 fs.
    Last edited by ccw127; March 27th, 2013 at 01:51 AM.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •