qt-imdisk x86
App show how to mount or unmount disk in RAM (size ~7Gb). Use imdisk_source_2.0.9.7z, imdisk.cpl (imdiskinst_2.0.9.exe).
WARNING! Run app with admin permissions.  

http://www.ltr-data.se/opencode.html/
ImDisk Virtual Disk Driver
Current version 2.0.9 built 26 August 2016
ImDisk Version history
2.0.9 Setup Source

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Correct test:
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OS: Windows 10
IDE: Qt5.5.0 - 5.11.1 (msvc2013, 2015, x86)
WindowsSDK 8.1, 10
install imdisk.cpl (imdiskinst_2.0.9.exe)