Can't Unmount Internal SATA ext4 Drive in Windows 10

[SterlingButters]

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I am trying to "Add Physical Disk to a Virtual Machine" via: https://pubs.vmware.com/ws6_ace2/ws/wwhelp/wwhimpl/common/html/wwhelp.htm?context=ws&file=ws_disk_ad... System Details: -Windows 10 -Vmware Workstation 14.1.1 build-7528167 Drive (D:) Details: -Preinstalled with Ubuntu 17.1 -Formatted ext4 -FireCuda SATA -Available for selection in Workstation as PhysicalDrive1 where PhysicalDrive0 is Windows Host (drive (C:)) Problem: From the prerequisites provided in the link, I can see that I need to unmap the Ubuntu drive (D:) which is a greyed-out option in Disk Management. unmount/eject the Ubuntu drive (D:) which not an option in File Explorer Is there a reason that Windows does not want to let me do these things? See pictures at (virtual machine - Can't Unmount Internal SATA ext4 Drive in Windows 10 - Stack Overflow​) for potential clarification. All help is appreciated!

[wenwang_myheave]

Now I cant open the page https://pubs.vmware.com/ws6_ace2/ws/wwhelp/wwhimpl/common/html/wwhelp.htm?context=ws&file=ws_disk_ad... , it's 404.

Do you have ever try to add the disk by "Physicaldriver1"  successfully, but failed when unmap it? Can you try to unmap it from the WS UI to remove the disk?

[continuum]

Have you tried to set the disk-status to "offline" ?