Update to Windows 10 caused unformatted partition?

flupke01 · Dec 11, 2015

Hi, I just updated from Win 8.1 to Win 10. Seemed to have worked as it should. But I discoverd I cannot acces my D: partition anymore; I get an notification saying the drive is unreadable and has to be formatted. The partition is located on my Main SDD, together (obviously) with my C: boot partition, which is working fine.
It is not a big loss at itself (D: is only used to install programms), but it's annoying and also quite disturbing...

Anyone got a clue what's going on here?

Digerati · Dec 12, 2015

I don't know what happened here. I have not seen this problem myself (except with drives larger than 2TB). There really is no reason the W10 upgrade would mess with the partitions, but it seems have happened to a few others too. I am not sure what to suggest. I do recommend you immediately backup your C drive just in case this is a potential drive failure.

From there, you might try a 3rd party application like Free Partition Wizard or EaseUS Partition Recovery Wizard which several folks are reporting worked for them. Or there are many partition recovery programs that are not free. I can offer no assurances any will work, however.

RepairandRestore · Dec 17, 2015

The last week we have similar problems with couple of customers.
There a problem caused by OneDrive during migration, for some reason Windows 10 locking the Windows folder and literally freezing the drive.
To be honest for now this is happening only with SSD hard drives.
Here I got procedure from Shawn Keene for restoring your permissions.
Anyway, this is good that you are administrator and the sole user. This is how it should be. So to fix the problem I think you just need to reset the security options on that folder. I can't really say how it got messed up, but this should fix it. These steps are a bit involved, but just take it step-by-step (some users print them and mark off what step they've done). If you get stuck, just let me know what step you're on.

Press Windows+R to show the Run box.
Type (or copy/paste) %userprofile% (including the percent signs) into the box and hit OK to open your user profile folder.
Right-click the Documents folder and go to Properties.
On the Security tab, click Advanced.
At the top, make sure the "owner" is set to your account. If it already is, please skip to step 6.
- A. If the owner is not you, click Change.
- B. Click Advanced
- C. Click Find Now
- D. Select (highlight) your account in the list (it may be a name or email address depending on your setup), then click OK to close the search box.
- E. Click OK again to close the "select a user" box.
- F. Turn ON checkbox for "replace owner on subcontainers and objects" (this makes sure you are the owner for everything under your documents folder also).
- G. After the checkbox is on, click OK close the "advanced security" box.
- H. Click OK again to close the Documents Properties box. At this point, you should be back where you were after step 2 when you opened the User Profile folder.
- I. Right-click the Documents folder again, and go back to properties,
- J. On the Security tab, click Advanced, then continue with step 6 below.
Click "Add"
Click "Select a principal"
Click Advanced
Click Find Now
Select (highlight) your account in the list (it may be a name or email address depending on your setup), then click OK to close the search box.
Click OK again to close the "select a user" box
Turn on "Full Control" checkbox.
Click OK to close the Permission Entry box.
Click OK again to close the "Advanced Security" box.
Click OK again to close the Documents Properties box. At this point, you should be back to where you were after step 2 when you opened the User Profile folder.

Now, double-click the Documents folder to go inside. Try opening any file you have, making a minor change and clicking "Save" to see if it saves properly now that you have "full control" over everything.

Again I know these are long steps. As a word of caution, please do not try to do this on a larger scope (for example, if you tried this on your whole C: drive, you could destroy your OS, so only do it on Documents/Pictures folders and such to be safe). Also, never use the "Deny" options when setting permissions because those take precedence over the allows, meaning that you can permanently lock yourself out of a folder and never get back in.

I hope this will help you :)

Aura · Dec 17, 2015

RepairandRestore, it seems that the procedure you posted is unrelated to the issue flupke is having. Plus, you are talking about the permissions on the "Documents" folder in the userprofile, and not the whole D: drive (that cannot be accessed at all).

RepairandRestore · Dec 17, 2015

I did`t wanted to change anything as this is Shawn Keene procedure.

If that is permission problem and the drive is visible, you can consider %userprofile% as drive letter.

If this is not permission problem, the best solution I found till now is to change the drive letter from Disk management.

This is issue I`v seen with larger hard drives, that why I would like to totally agree with

Digerati

.

in few cases we just used a 3rd party software to change GPT to MBR but this did`t work for everyone.

FreeBooter · Dec 24, 2015

The issue could be cause by damage (FAT/NTFS) file system corruption scan the D: drive for file system errors. Open Windows Explorer Then, right click the D: partition that you want to check for errors and select Properties. In the partition’s Properties window, go to the Tools tab. The first section is named Error checking. This where you launch the disc error checking wizard. Click Check button. The Check Disk window opens, displaying two options for performing the scan of the selected drive. Enable both options and click Start button.

OldGrayGary · Dec 29, 2015

flupke01 --- I'm curious to hear if you've been able to resolve your partition problem. [& if so, how] ...

MichaelB · Jan 7, 2016

What flupke01's Problem is:
>> I get an notification saying the drive is unreadable and has to be formatted.

The Partition is in RAW Format and the corresponding Partitiontable is defect, not the $MFT itself.

Either you are pretty familiar with hex and walk down the cluster chains or yo need testdisk to repair the damaged table.
chkdsk would not help as it is unable to correct the table itself at this moment.

TestDisk - Partition Recovery and File Undelete

The reason for the above problem can be found in utilities like TuneUp and Daemontools (virtual drives) as well as antivirussoftware.

regards
Michael

FreeBooter · Jan 12, 2016

MichaelB said:
What flupke01's Problem is:
>> I get an notification saying the drive is unreadable and has to be formatted.

The Partition is in RAW Format and the corresponding Partitiontable is defect, not the $MFT itself.

Either you are pretty familiar with hex and walk down the cluster chains or yo need testdisk to repair the damaged table.
chkdsk would not help as it is unable to correct the table itself at this moment.

TestDisk - Partition Recovery and File Undelete

The reason for the above problem can be found in utilities like TuneUp and Daemontools (virtual drives) as well as antivirussoftware.

regards
Michael

Does Chkdsk command does not help then how come i repaired lots of storage drives with same issue with using Chkdsk command, you should never give advice to any person as if you are sure what is causing the issue i myself not saying my suggestion will work but i will never rule out that the storage drive file system could be damage which will cause issue OP having as i should know i repaired lot of them .

RepairandRestore · Jan 12, 2016

Hello again,
After long research with technet and many tests, we figured out this problem is caused by OneDrive.
Chkds will not help in this case, testdisk will be not able to read the partition table at all as is protected.
Still waiting for the technet to give some reasonable solution to unblock the OneDrive protection causing this issues.......

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Update to Windows 10 caused unformatted partition?

flupke01

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Digerati

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Hardware Expert
Microsoft MVP (Ret.)

RepairandRestore

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Aura

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RepairandRestore

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FreeBooter

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OldGrayGary

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MichaelB

Sysnative Staff, BSOD Kernel Dump Senior Analyst

FreeBooter

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RepairandRestore

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Update to Windows 10 caused unformatted partition?

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ModeratorHardware ExpertMicrosoft MVP (Ret.)

Well-known member

Sysnative Staff, Security Analyst

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Sysnative Staff, BSOD Kernel Dump Senior Analyst

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Well-known member

Moderator
Hardware Expert
Microsoft MVP (Ret.)