ResilientChangeTrackingEnabled = true has no effect

If RCT is not enabled, it can’t be enabled using the ResilientChangeTrackingEnabled property:

using var v = VirtualDisk.Open(@"F:\Hyper-V\Windows XP\Virtual Hard Disks\Windows XP.vhdx", false, false, true);
v.ResilientChangeTrackingEnabled = false;

Does nothing (And it does not throw any error).

From a C++ program, invoking the native function works:

HANDLE vhdHandle;
_VIRTUAL_STORAGE_TYPE storageType{};
DWORD res = OpenVirtualDisk(&storageType, L"F:\\Hyper-V\\Windows XP\\Virtual Hard Disks\\Windows XP.vhdx",
        VIRTUAL_DISK_ACCESS_ALL, OPEN_VIRTUAL_DISK_FLAG_NONE, NULL, &vhdHandle);

SET_VIRTUAL_DISK_INFO setDiskInfo{};
setDiskInfo.ChangeTrackingEnabled = true;
setDiskInfo.Version = SET_VIRTUAL_DISK_INFO_CHANGE_TRACKING_STATE;
SetVirtualDiskInformation(vhdHandle, &setDiskInfo);

Please note that ResilientChangeTrackingEnabled = false (disabling RCT) actually works 😅, so RCT can be disabled, but not enabled.

[dahall]

This is now fixed

[dahall]

Yep. Under 32-bit builds the structure aligns correctly so setting the structure field to 1 works. I’ll fix it so it works on both 32 and 64 bit. Thanks for your help.