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 Post subject: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 23rd, 2021, 9:05 
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Joined: December 18th, 2019, 6:21
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Hi

A friend has accidentally formatted an 2TB Seagate external drive with Rufus when trying to create a Windows installation USB.

I don't know the original filesystem (maybe NTFS or exFAT?)

Rufus overwritten the original partition table and created an 32GB FAT32 partition.

The new partition has 4GB Windows installation files written in it.

I guess rest of the disk is untouched.

What is the best approach/ best software for recovering files out of it? Recuva, R-studio, testdisk...?

I'm creating an image right now, will start recovery tomorrow.

Thanks


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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 23rd, 2021, 10:22 
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Partition Table is gone. So you won't recover any data with structure as it was before.

You can use any data recovery software to scan in raw recovery mode targeting specific file types.


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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 23rd, 2021, 10:45 
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Oh, shoot. I guess it has Autodesk files etc. but no idea what else. I'll see if the owner can give more precise description.


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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 23rd, 2021, 15:22 
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Joined: September 8th, 2009, 18:21
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Location: Australia
Can you show us the Partitions window in DMDE?

https://dmde.com/

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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 24th, 2021, 4:13 
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fzabkar wrote:
Can you show us the Partitions window in DMDE?


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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 24th, 2021, 13:29 
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As expected, the $MFT has been overwritten. I think that a raw recovery will be your only option (as already stated), most likely without original file names.

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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 24th, 2021, 16:01 
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fzabkar wrote:
As expected, the $MFT has been overwritten. I think that a raw recovery will be your only option (as already stated), most likely without original file names.


I have never checked this, but I do not know how much of MFT DMDE actually examines. What I do know is you may have a lucky break. If I for example look at the NTFS partition on my internal drive MFT is fragmented and a huge portion is out of this 4 GB danger zone. MFT holds about 1 million files which is roughly 1 GB. In my case overwriting 4 GB of start drive would still allow me to recover 60% of files using file system meta data.

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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 24th, 2021, 19:23 
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I'll see what will come out of it. This is an external drive so I guess there's a slim chance of fragmentation as the files were probably written in one (or two) go.

Which software handles this overwritten MFT scenario best? Getdataback, R-studio or DMDE?


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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 24th, 2021, 22:10 
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atuovu wrote:
Which software handles this overwritten MFT scenario best? Getdataback, R-studio or DMDE?

I have no personal experience, but there is a DR pro at reddit who consistently claims that Getdataback is the better tool in such cases, even though his primary tool appears to be R-Studio. Just saying ...

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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: January 25th, 2021, 3:59 
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Cool, thanks. I plan to try demo of both of them when I have the time.


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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: February 1st, 2021, 8:50 
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Status update:

GetDataBack didn't find anything (only NTFS special$ files).

Also tried raw file recovery with R-Studio. Scanned for 3 days and only found ~2-3 GB worth of mpg, jpg and pdf files. Some of them were legit but most of them useless. Scan abrubtly ended due to an unrelated BSOD and I didn't restart the scan afterwards.


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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: February 1st, 2021, 9:15 
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RAW scans typically result in many false positives. 2 - 3 GB, how full was drive, how much data is expected?

GetDataBack, what version did you use? Assuming Pro, what file systems were detected, what level did you select?

Alternatively try ReclaiMe (long scan), UFS, ZAR (zero assumption recovery). Note that the latter will not show you RAW results unlike the first 2. However it's pretty good coming up with a file system assuming meta data is actually detected.

If you settle for RAW or if it's only option, PhotoRec is free and supports many file types, not just photos.

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 Post subject: Re: 4GB of 2TB hdd is overwritten, how to recover the rest
PostPosted: February 2nd, 2021, 19:08 
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Joined: December 18th, 2019, 6:21
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Arch Stanton wrote:
RAW scans typically result in many false positives. 2 - 3 GB, how full was drive, how much data is expected?

GetDataBack, what version did you use? Assuming Pro, what file systems were detected, what level did you select?

Alternatively try ReclaiMe (long scan), UFS, ZAR (zero assumption recovery). Note that the latter will not show you RAW results unlike the first 2. However it's pretty good coming up with a file system assuming meta data is actually detected.

If you settle for RAW or if it's only option, PhotoRec is free and supports many file types, not just photos.


Unfortunately I've no idea how much data was in the drive.

Used the latest version of getdataback (simple?) on 4-star mode. found 2TB NTFS but it was useless as stated.

I'll try the programs you mentioned.


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