Boot Fails windows 10. Disk Locked seen in Repair PC.

Posted on 2016-10-05
Medium Priority
Last Modified: 2016-10-24
Upgraded to Windows 10 Pro from Windows 8.1 Pro. System motherboard MSI NF980-G65 a gaming board. Run C:\ drive as a Raid 5 array with 1.36TB.

Ran several months productively but with lots of updates from Microsoft. Two weeks ago lost boot capability - unavailable system.

From system recovery disk entered command prompt. Ran C: Chkdsk /f == no errors found. Ran C: dir, all software on C: is as expected (windows, system32, etc).  Ran most of DISKPART.EXE series of commands to observe DISK 0 (system) and Partition Volumes status. Attributes of Disk andeach Volume show all NOs for parameters.

Suspected Read-only status but parameters show none. Tried resetting boot record for C:/Windows/system32 drive using BCDBOOT.EXE and bootrec  /fix and bcd commands. Both techniques show same failed boot.

Ran Attributes Disk Clear / Set Read-only command but they fail with cannot Clear / Set Read-only. However, Attributes Volume Clear / Set Read-only works ok.

Net: Looks like the BOOT DISK is locked and cannot fix it. Malware or other blocking may be happening but can't prove it.

Tried Repair PC recovery. It fails with "Disk Locked" status.

Need expert help and advise here!!
Question by:Teddygtri
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 4
  • 2
  • +1
LVL 97

Accepted Solution

Experienced Member earned 1000 total points
ID: 41831000
The update a few weeks back is likely the Anniversary Update V1607. With this new version, Microsoft is enforcing driver standards. Have you checked for new RAID drivers compliant with Windows 10?

Author Comment

ID: 41831010
Thanks John - But how to find and apply?? Cannot boot system without doing full Reset PC and start over with full install losing several months of good productivity data and apps installed?
LVL 97

Expert Comment

by:Experienced Member
ID: 41831013
You can try removing the disk, putting in a carrier, and recovering the data on another computer.

You can reinstall from the Media Creation Link:


But unless you are sure about RAID drivers, a reinstall may have the same problem
Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

LVL 56

Expert Comment

ID: 41831226
I see no indication that the boot stage is ever reached, so thoughts about drivers are speculation.
Please clarify what you see exactly. You wrote "Two weeks ago lost boot capability - unavailable system." - what is the error message and what stage are you at? upload a small photo, maybe.
Also share the output of diskpart list disk and, after selecting the disk, diskpart list partitions.

Why don't you have an image backup? The problem would be solved in minutes.
Anyway, I guess we can fix it.
LVL 88

Expert Comment

ID: 41832180
RAID 5 is highly unreliable, and even more so if you are using the fakeRAID controllers integrated in most mainboards. Stop using RAID 5 and also never use your mainboard's fakeRAID Controller. If you are using a pro version of Windows, use the OS's built RAID 1. Otherwise don't use RAID at all, or get a real RAID controller along with enterprise class disks.

I suggest you re-install the OS (not to RAID 5), then restore your data from your backups.

Author Comment

ID: 41834548
To McKnife

Thanks for quick response --

Your questions:
1) Error Message? It is "Inaccessible _Boot_Device"
2)Stage at?  ?? Cannot boot opsys with above message. Have run repair tools Command Prompt DiskPart.Exe, BCDboot.exe and bootrec commands -- no affect. Can change drive to c: and can see all directories and data there. From Repair Computer disk:: Ran Auto Repair PC - fails with did not fix, ran Refresh PC - fails with disk where windows installed is locked, ran Reset PC - fails with required drive partition is missing.
3) Share results of DiskPart.exe: List Volume = Vol 1 System Disk UDF DVD-Rom 4047MB Healthy / Vol 2 SysReset NTFS Partition 100MB Healthy / Vol 3 Master_C NTFS Partition 1396GB Healthy / Vol 4 blank NTFS 450MB Healthy
DiskPart.exe Attributes Volume: All parameters show "No" across all volumes.
4) Why no Image Backup: Have many from Symantec's 2013 SSR. But they are not compatible with Microsoft for their Restore Image. Symantec System Recovery Disk created fails disk locked.

Author Comment

ID: 41834555
To Rindi

Thanks for comments --

Will need to migrate / convert Raid 5 to Raid 1. Have only seen convert Raid 5 to Raid 10. But from what I have seen, the systems did not survive very well in process. So it sounds like scratch build to create.

Anyway, this is academic since system involved cannot boot.
LVL 56

Assisted Solution

McKnife earned 1000 total points
ID: 41834752
Inaccessible boot device - that could mean everything ok, just the driver for the controller is missing. In setting drivers into unbootable systems os possible but is experts' work. See http://www.drivesnapshot.de/en/hardware.htm
LVL 56

Expert Comment

ID: 41855386
Just why wouldn't you comment anymore, Teddygtri?

Assisted Solution

Teddygtri earned 0 total points
ID: 41856478
Looks like Johns comments are more what's needed. I find that the mother board has conflicts with Windows 10 that aren't documented. Had to uninstall windows 10 and drop back to Win 8.1.
LVL 56

Expert Comment

ID: 41856525
I wonder if you tried the method I had linked.

Featured Post

On Demand Webinar: Networking for the Cloud Era

Ready to improve network connectivity? Watch this webinar to learn how SD-WANs and a one-click instant connect tool can boost provisions, deployment, and management of your cloud connection.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article describes how to reset your Windows 10 password when you've forgotten it.
Optimized for private cloud infrastructures and datacenters, Nano Server is minimalistic, yet super-efficient, OS for services such as Hyper-V and Hyper-V cluster. Learn how you can easily deploy Nano Server and unlock its power!
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
Suggested Courses
Course of the Month14 days, 15 hours left to enroll

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question