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Accidentally changed MBR to GPT

Posted: 23 Mar 2015, 23:49
by favomedrano
I have a full disk Tuoro 4TB disk, originally with a MBR partition information, with two VFAT partitions.

I could read it in my ubuntu machine, but couldn't in a windows 8 machine, so i did the mistake in the disk administration window and clicked on the disk. "convert to GPT disk".

Now i can not read it in neither ubuntu or windows, I'm trying to recover the MBR , but when I run the analysis quick search appears only the first GPT reserved partition.


Its a good idea to change the partition information again to MBR, or do I let the deeper analysis run?

Thank you very much, I'm in panic right now!

Re: Accidentally changed MBR to GPT

Posted: 24 Mar 2015, 07:19
by cgrenier
When running TestDisk, after selecting the disk, choose PC Intel instead of EFI GPT, Analyse, Quick Search.
If all your partitions are listed, choose Write and confirm.

Note that EFI GPT is recommanded for disk bigger than 2 TB.

Re: Accidentally changed MBR to GPT

Posted: 24 Mar 2015, 18:00
by favomedrano
Thanks for the help!.
I did what you told me, and i found a partition Fat32 LBA, but when i press "p" to list the files, it says that the filesystem may be damaged.
Intel /PC Partition and Analize
Intel /PC Partition and Analize
PCIntelAnalize.png (44.53 KiB) Viewed 3980 times
Partition Found
Partition Found
PartitionFound.png (52.37 KiB) Viewed 3980 times
No files found
No files found
Nofiles.png (34.86 KiB) Viewed 3980 times

Something can be done? run a deeper search, or write the MBR first .

Re: Accidentally changed MBR to GPT

Posted: 25 Mar 2015, 05:31
by favomedrano
Did the deeper search, and it did not found any new partition, when i try to list the files says that the filesystem may be damaged..

Any other recommendation on what to do here?

(I get a Fat32 LBA partition on quick search, but I remember that the filesystem was a VFAT.)