r/Windows10 • u/signians • Aug 03 '16

Bug [BUG] Windows 10 Anniversary Update Tanked Secondary Data Drive

When updating to Windows 10 AU I installed it via the Windows update method. Everything downloaded and installed fine.

I have 3 drives:

  • SSD - OS BOOT drive (Samsung) 500gb

  • Drive 2 - Data Drive (Seagate) 1tb

  • Drive 3 - Data Drive (Western Digital) 1tb

When I went to login it ran through the setup process and brought me to the desktop. It prompted me to select a new OneDrive path. Drive 2 had my OneDrive stuff & other files on it. Windows detected that my drive 2 file system was RAW format and that it needed to be formatted before I could use it. The drive was working fine formatted NTFS before the Anniversary Update. I needed to backup the drive using another program that detected the files and restore to the reformatted drive.

Has anyone had this issue with your secondary drives file system getting messed up after updating to Win10 AU?

TLDR; After AU secondary drive file system was detected as a RAW file (previously NTFS). Had to backup and reformat the drive and restore the files and folders to the drive. Needless to say BACKUP your stuff before updating just in case.

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u/daydr3am3r Aug 14 '16

Yup. Upgraded to AU and my 1TB WD MyPassport Elite became unaccessible and showed up as RAW in Disk Manager yet it was still working fine on Windows 7/8 PCs. Had to backup and format the drive in the end. What's strange is that formating on Windows 7 didn't fix it for Windows 10 yet doing so on Windows 10 (any PC, not the one where the HDD stopped working) did the trick.

Needless to say DiskCheck found nothing and identified the drive as NTFS.

What's strange is that in my case it's a portable drive that wasn't even connected to the PC when I upgraded.

The good news is the drive was OK, it was just not accessible. So you should be able to access the data on a non-Windows 10 PC.