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Long story short : I messed up my GPT and went on to try to fix it without asking anyone, just searching around. Didn't turn out too well.

Right now all I'm concerned about is a 500GB that I formatted as exFat partition with some important files. But on my journey to fix, I may have used the 'fdisk' command on a GParted Live CD I have (couldn't get on any OS) and switched it to ext2. Now I can't get access to it, doesn't show up on Windows or Mac. Only on the partition table as ext2.

I have got access to most of my files through recovery softwares but they cannot recover with the originial directory or file names, which would be a pain to fix.

I want to know if there is a way to change back the file system to exFat without having to format it.

Thanks in advance.

EDIT:

This is how my partitions look like right. enter image description here

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2 Answers

"change back the file system to exFat without having to format it" ... actually, you formated it to ext2. So there is a good chance, that the old "underlying" exFAT is fairly broken, even after a good recovery.

Try and have a look at http://www.cgsecurity.org/wiki/TestDisk

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I have used Testdisk ... even from the beginning while trying to solve the first problem with my OS. Did a Deep Scan but didn't really find what I was looking for. I actually did find a partition on the same sector but what I wanted to know is, if I only select that partition to recover, would it overwrite all the others? Like would I loose all of other partitions? –  Wandyer Dec 15 '12 at 14:25
    
There is no easy answer to this. Testdisk does propose to recover partitions and tells you where the recovered partition will begin and end. Check carefully, whether there is some overlapping with existing stuff or not. From experience, it should not destroy other partitions, but it is absolutely not a "save" operation. If you have the chance, backup the data from your complete hard drive before you perform any further steps. EDIT: You could post the diagnostics output of testdisk and what it proposes into your initial question here for analysis. –  ernestopheles Dec 15 '12 at 14:50
    
I've done a deeper search and it found 2 partitions on the same sectors but both were still as ext2. Data Recovery Softwares will show, I believe, all of my files but the only problem is that they are not with their original directories, just as RAW files. I will try to upload more picture of what Testdisk shows. –  Wandyer Dec 17 '12 at 22:35
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Best after trying is TestDisk 6.13 to save SD card that became RAW after Windows 7 crashed whilst moving files from the SD to HDD. After reboot the SD was RAW. I took the chance after trying many programs without success to WRITE the partition back to the SD. Steps are in website http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step Better than initializing the disk again, since the folder structure could be found.

Recuva - only most photos and black videos (none of the videos worked but took up disk space - just showed black or at most the first frame)

Active Partition Recovery - showed the disk structure with DCIM and the folders in it and the files in the folders but the FREE version would not let me check any video bigger than 10MB and those smaller did not work. It did not allow any saving to another drive either because the SD card was RAW.

Aidfile Recovery took a long time to come up with directory structure without any progress indication. Looking into the most important folders showed nothing.

Glary Undelete crashed with: Access violation at address 00404573 in module 'undelete.exe'. Read of address 00000000.

Puran File Recovery found 694 files and could list by type of jpg or mp4. The mp4s played video BUT no sound.

Remo exFAT Recovery && Yodot File Recovery didn't even see the raw SD card

TestDISK was the BEST and took least time to Anaylse, finding exFAT structure, then writing to the SD the Partition which restored everything.

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