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Unknown Partition when creating master image

Beginner
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We recently just started using the newest model of Probook from HP (HP Probook 640 G3) and I've been having issues creating a master image using windows 10 with these machines.

Out of the box everything seems fine if I want to create a master image, but as soon as I make any changes the C: drive starts showing up as Unknown with a type of "FS:'Unknown' Partition" and I have not been able to create a usable image because of this.

I ran chkdsk /f /r on the drive and it came back clean.  Any ideas/suggestions?

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mvp

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What version of SD are you using?  1749 was released in August with support for Windows 10 and Server 2016.

What types of changes are you making and where, that causes issues (configuration of the task in the SD5 console, changes during the deployment, changes to the drive after the image is deployed)?   A change to the bios settings?

Need a little more info to help make an educated guess.  I'd also recommend contacting Acronis technical support to open a case with them in case there is a deployment issue/bug.  

Beginner
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I'm having the same thing come up with brand new Dell lat's 5480.

Trying to make a master, and the C-Drive is "Unknown", file system also says "unknown".

The only thing I've done is install our company software. I haven't made any changes to the BIOS.

Snap deploy says it can continue, but only if I let it to a sector by sector image.

 

Which I am trying now.

Beginner
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"What types of changes are you making and where, that causes issues (configuration of the task in the SD5 console, changes during the deployment, changes to the drive after the image is deployed)?   A change to the bios settings?"

The issue occurs when any change is made to the original OS.  Out of the box if I image the laptop with its factory settings the machine shows up fine.  If I take the machine and uninstall any software (usually we uninstall default HP software) and then install our company software on it (simple stuff like Microsoft office and checkpoint VPN) then the drive starts showing up as the unknown partition.

 

"I'm having the same thing come up with brand new Dell lat's 5480.

Trying to make a master, and the C-Drive is "Unknown", file system also says "unknown".

The only thing I've done is install our company software. I haven't made any changes to the BIOS.

Snap deploy says it can continue, but only if I let it to a sector by sector image.

 

Which I am trying now."

 

Sounds exactly the same, we are only making simple changes, nothing to bios or serious system changes.

I have tried the sector by sector and had no luck, so I will be interested if you have any luck.

Beginner
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As an update, after working with the same image for a while now I was able to run a chkdsk and now have the file type showing as "none" as opposed to "unknown."  

 

Not sure if that helps any.

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Hello Dan,

I'd suggest checking the system for errors before image creation, then creating a master image with the help of an Acronis bootable media instead of an Agent installed onto the master machine, see Offline imaging. Validate the new image after creation. This will probably help to workaround the issue, but to know the exact cause and cure you'd need to raise a support ticket, so that our engineers can proceed with the investigation. 

In reply to by Graham Llewellyn

Beginner
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the problem may be that the drive is encrypted with bitlocker from the factory. run the following powershell command as administrator:

Disable-Bitlocker -MountPoint "C:"

wait for the drive to unencrypt... use this command to check progress

Get-BitlockerVolume