Partition corrupted, Partition Recovery, Evo 850 SSD

Hello,

my boot drive c: seems to be broken.

Problems starts with a bluescreen. After the bluescreen, Windows 10 is not starting anymore.
All windows repair tools are not working, also "set back to recovery point" is not finding any recovery point.
I tried chkdsk then, it shows some "segment unreadable".
Also scf is not working. Also not working after running chkdsk. chkdsk also shows errors in 2nd run.

When I go to command line in windows repair tools I also can not change to c:, I get a message which says something like partition/drive can not be read.
So I guess parttition (perhaps drive) is corrupted / needs fixes / or is broken.

- Drive: Samsung Evo 850 SSD
- beside windows automatically made boot partition the whole drive c: has one data partition
- Used Hardware Encryption with Bitlocker and have Recovery Key at hand if needed

What tools to you suggest to try to recover drive/partition c:?
Any advises how I should continue?

Big thanks to everyone who helps at this problem!

See if any files can be viewed and recovered using Ubuntu / Linux:

Create a bootable USB stick on Windows | Ubuntu
Linux to the rescue! How Ubuntu can help a computer in distress | PCWorld

Thank you for your support.
Sorry for missing some details and posting some non-technical correct information. I try to extend and correct the information:

dalchina said:

This sounds a little odd - a UEFI installation typically has 4 partitions, so I assume yours is MBR.

Yes, you are right and my c: partition description was not correct I guess. It is a default UEFI installation, so your explanation should be correct, because I did not customized any partitioning on c:. So, it's a "simple" Windows 10 install with UEFI on Windows 10.
Just with SSD/SED with Hardware-encryption with Bitlocker (using TPM). Having Recovery key at hand.

I added more information under "my computer". Most important I guess:
- It's a laptop / notebook from 2017
- XMG U507, should be based on Clevo P751DM2-G
- Windows 10, most of the time with newest patches/updates
- C: is Samsung Evo 850 (SSD / SED)

dalchina said:

Hi, I assume you are running SFC and chkdsk off line, and attempting to use System restore from by booting from a Win 10 bootable medium, and that your Win 10 is not bootable.

I tried both:
- At first after bluescreen and windows do not start anymore, Windows load Windows Repair screen () at startup and I tried to repair, tried to reset recovery point (both failed) and did chkdsk and sfc their. I also get an error message when tried to access c: in command line, which I guess is the main problem.
- By having no success I give a try to a Windows 10 bootable, so I made a new Windows 10 bootable USB stick with MS MediaCreationTool2004. I booted from USB and tried again windows repair, chkdsk and sfc and getting same messages and no successful access to C: in command line.

dalchina said:

Have you been using disk imaging routinely as is endlessly recommended here? E.g. Macrium Reflect (free- paid)?
If so, and if you need a new drive, you will be able to restore a recent disk image you have created.

I have a backup routine of important files (user files), not for full c: as image, and sadly I have this backup not on daily base. By having some files I need from last days, I actually hope to get partition up and running again (or get files with data recovery). Also I hope not to have to install everything new (all programs).

dalchina said:

You can use the utilities on the bootable disk to recover files you haven't backed up in a familiar Win 10 environment.

Do you know how well these files can handle SED's ? (self encrypted devices like EVO 850 SSD). I could imagine it will be hard for data recovery tools to get names from directories/files correct when not understanding (be prepared) that the SED has files encrypted. Or is it nothing I had to be concerned about?

Big thanks!

dalchina said:

Hi, as a minimum, you can boot from a live boot disk as I suggested and check the SMART parameters etc. That will help to determine if the disk has failed.

Yes, that's the next step I will try. I made your suggested Kyhi's boot disk next and give it a try

dalchina said:

You said originally you use bitlocker, but if you are not able to decrypt the disk, then data would not be recoverable.
Others will know more on this.

Evo 850 as SSD with HardwareEncryption also called SED can work with Bitlocker (with support of TPM) to use the SED self-encryption to make your own password for accessing the drive. By reboot the laptop, first thing is that Bitlocker pops up and ask you for the password. Beside the password you can have a recovery key. Of course I have both, so I have no concern to be able to decrypt it when the partition is working. But I am very unsure how Bitlocker/SED is working together when the partition is corrupted. And I am very unsure, if a "data recovery tool" can handle an self-encrypted partition, which can not by decrypted by Bitlocker because partition can not be loaded. I hope this explanation is better. If not, please let me know.
But perhaps I should give a try to know more about what data recovery tools are capable of. I will continue with "Kyhi's boot disk" and "HD Tune" now.

dalchina said:

If your disk has failed, or is not recoverable, and you say you haven't been using disk imaging, you will have no option but to clean install.

Yey, but I have to give it a try if beeing recoverable.
On "Kyhi's boot disk", what tools can make a try to make c: readable/recovered again?
Or better ... I think at first I should run "HD Tune" and post the information I see there. I will do that now. After that, I hope we can try some recovery tests with some tools.

- - - Updated - - -

HDTune Health Tab:
Column "status" shows "Ok" in every row. Values shows fine.

HDTune Error Scan
After Scan I get 99,8% damaged blocks. The visual report shows everything is red, beside the first to two squares and the last 4 squares are green.

I have also two more SEDs in my Notebook, Samsung QVO 850 and Samsung EVO 860. I did not do a check of them till now, because I never guessed all SED could be broken at one.
But now I did a "HDTune" check on all SED drives, also both of these drives has Health Status "ok" in all rows, but both also have on "Error Scan" highly damaged! Both shows in HDTune 100% damages blocks. Both of these drives show 100% of squares red on tab "error scan" after scan..
--> Is that really possible, that "something" (I just saw a bluescreen) has completely damaged all three of my SSD in just one go?!

Some news...

As I said in my update on my last post at the bottom, when Using HDtune from Kyhi's boot disc, at first all of my three SEDs shows damages blocks (C: 98%, D: 100%, E: 100%)

I also tried MiniTool Partition Wizard, and it shows my unformatted data partitions for all the three drives!

As I suggested before, that is just a problem of SED self-encryption used with bitlocker, at least for drive D: and E:. Because these drives are encrypted SEDs, other tools like HDtune and MiniTools turned to be useless when drives are not unlocked before.
I fixes that now, by open the Explorer on Kyhi's boot disc and click on each drives. Then Windows on Kyhi's boot disc recognized these are hardware encrypted SEDs, and ask for recovery key then, I can enter keys for all discs and this fixed "error messages" of Hdtune/minitools at least for D:/E:.

So, I could unlock all drives. After this D: and E: are now accessible. On both HDtune shows me green blocks now.
I also can access files properly (tested some photos/textfiles) on D:/E: and alsoMini Tools shows me active partitions on them now.

But ... c: still have problems.
Accessing C: in Explorer still makes the same error I also get on command line in windows repair: "C.\ is not accessible - The File or Directory is corrupted and unreadable"
C: still shows no data partition in Mini Tools
C: still shows damaged blocks in hd tune of 98%


Because that's a similar behavior I had before unlocking D:/E: as I describe above, I am not sure if the drive c: is really defect or its just something with unlocking of the drives makes problems. Also also SMART values in C: in HDtune shows "OK", what seems fine for in general.

Whats now? Any more ideas?
- Any tools I could try to get access to data partition on C and/or to repair the partition?
- Or any other ideas to get even more deeper analyzed what is the root problem and how to fix?