I was trying to create bootable USB media in Boot Camp Assistant. Had a small USB plugged in and my HDD. Upon formatting I think my partition table screwed up. I had 2 partitions. 1.2TB NTFS and 0.8TB exFAT. Immediately I ran diskutil and gpt which show:

$ gpt show
       start        size  index  contents
           0           1         MBR
           1          62
          63  2344529857      1  MBR Part 7
  2344529920  1562497024      2  MBR Part 7
  3907026944        2220

diskutil (I already tried to fix using gpt add - causing both partitions to read NTFS):

$ diskutil list
/dev/disk1 (external, physical):
   #:                   TYPE NAME               SIZE      IDENTIFIER
   0: FDisk_partition_scheme                   *2.0 TB    disk1
   1:           Windows_NTFS                    1.2 TB    disk1s1
   1:           Windows_NTFS                    800.0 GB  disk1s2

I tried to recover it using gpt add and made the GUID NTFS for both. They wouldnt mount.


I then tried pdisk and completely ruined my partition table.


Is there a way i can get my partitions back? After pdisk my gpt show now reads:

$ gpt show
       start         size  index  contents
           0   3907029164

and diskutil reads:

$ diskutil list
/dev/disk2 (external, physical):
   #:                   TYPE NAME               SIZE      IDENTIFIER
   0:                                          *2.0 TB    disk2

Am I screwed? I havent written to the HD. I know my files and partitions are still there. I just need help fixing this.

(p.s. currently using testdisk and scanning as an INTEL drive).

  • In the first three screenshots you are maltreating disk1, in the last three disk2! ??? Also, pdisk is a tool to partition disks with the Apple Partition Map scheme which is rather old (and inappropriate here)! The proper tool for MBR disks is fdisk. – klanomath Mar 26 '18 at 14:23
  • yeah it changed disk number during all my mucking about which was strange. Testdisk quick scan couldnt find the parts so doing deeper scan. Im now preparing for the worst. – Hayden Wilkinson Mar 26 '18 at 20:37
  • If you provide/allow remote access i may have look. Related: apple.stackexchange.com/a/309948/93229 another: apple.stackexchange.com/questions/309863/… – klanomath Mar 26 '18 at 20:40
  • That sounds great. how do i allow remote access? – Hayden Wilkinson Mar 27 '18 at 9:09
  • You have to download TeamViewer (currently TV 12 is installed here - AFAIK the latest version TV 13 doesn't allow access for TV 12 clients - so you have to download, install and configure an older version teamviewer.com/en/download/previous-versions). Root access and a tool (e.g. wxHexEditor) are required in your environment. The TeamViewer credentials have to be sent to klanomath(at)googlemail.com. – klanomath Mar 27 '18 at 9:14

Given that this is about data loss on a windows-formatted disk, you might want to ask in a windows-centric place. It sounds to me like data recovery (deleted file scans) would be your only hope.

I'm not clear, did you have a USB thumb drive and a 2 TB USB HDD plugged in, and picked the wrong one for making the Bootcamp tools?

  • The reason for my initial posting here was that I am using osx and it is an issue I need resolved using osx. I had a somewhat similar issue before where my partition table of my mac hdd had corrupted and was fixed manually using gpt. To answer storage media, I'm using a 2TB HDD formatted in paragon partition manager. 1 NTFS part and 1 exFAT part. I had ALSO plugged in a thumb drive to create a bootable media using bootcamp assistant. I had selected the right USB to create the bootable media, however, ALL USB devices freaked out and my HDD was left corrupted. – Hayden Wilkinson Mar 26 '18 at 12:38
  • Data recovery might be my best option, however i know that my info is still there and perfectly in tact, I Just need to find the right sectors and rebuild the drive partition map. – Hayden Wilkinson Mar 26 '18 at 12:39
  • You have the partition information. Have you tried using fdisk to reenter the MBR partition values? – David Anderson Mar 27 '18 at 8:41
  • I will do that. Just dont know the commands to do it. – Hayden Wilkinson Mar 27 '18 at 9:16
  • Could I get some assistance please? THANKS! :) – Hayden Wilkinson Mar 27 '18 at 9:16

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