/// <summary>
/// create a virtual drive (unformatted)
/// </summary>
/// <param name="driveLetter">drive letter. Example : 'A', 'B', 'C', 'D', ..., 'Z'.</param>
/// <param name="sizeInMegaBytes">drive size in mega bytes</param>
/// <param name="deviceNumber">device number to create, UInt32.MaxValue for auto</param>
/// <param name="backWithVirtualMemory">back the virtual drive with virtual memory (might slow the drive but enhance reliability)</param>
/// <param name="skipImDiskNet">access directly the C++ ImDisk library without the ImDiskNet wrapper</param>
/// <returns>true if success, false if failure</returns>
public static bool CreateDevice(char driveLetter, int sizeInMegaBytes, ref uint deviceNumber, bool backWithVirtualMemory = false, bool skipImDiskNet = false)
{
#region args check
if (!Char.IsLetter(driveLetter))
{
throw new ArgumentException("Must be a letter from A to Z.", "driveLetter");
}
if (sizeInMegaBytes < 1)
{
throw new ArgumentException("Must be positive.", "sizeInMegaBytes");
}
#endregion
long sizeInBytes = sizeInMegaBytes * 1024 * 1024;
string mountPoint = GetMountPoint(driveLetter);
ImDiskFlags mode = ImDiskFlags.DeviceTypeHD;
if (backWithVirtualMemory)
{
mode = ImDiskFlags.DeviceTypeHD | ImDiskFlags.TypeVM;
}
if (!Load())
{
return(false);
}
try
{
if (skipImDiskNet)
{
CreateDevice_Cpl(sizeInBytes, // Size of virtual disk. If this parameter is zero, current size of disk image file will automatically be used as virtual disk size.
0, // Number of tracks per cylinder for virtual disk geometry. This parameter can be zero in which case most reasonable value will be automatically used by the driver.
0, // Number of sectors per track for virtual disk geometry. This parameter can be zero in which case most reasonable value will be automatically used by the driver.
0, // Number of bytes per sector for virtual disk geometry. This parameter can be zero in which case most reasonable value will be automatically used by the driver.
0, // A skip offset if virtual disk data does not begin immediately at start of disk image file. Frequently used with image formats like Nero NRG which start with a file header not used by ImDisk or Windows filesystem drivers.
mode, // Flags specifying properties for virtual disk. See comments for each flag value.
null, // Name of disk image file to use or create. If disk image file already exists the DiskSize parameter can be zero in which case current disk image file size will be used as virtual disk size. If Filename paramter is Nothing/null disk will be created in virtual memory and not backed by a physical disk image file.
false, // Specifies whether Filename parameter specifies a path in Windows native path format, the path format used by drivers in Windows NT kernels, for example \Device\Harddisk0\Partition1\imagefile.img. If this parameter is False path in FIlename parameter will be interpreted as an ordinary user application path.
mountPoint, // Mount point in the form of a drive letter and colon to create for newly created virtual disk. If this parameter is Nothing/null the virtual disk will be created without a drive letter.
ref deviceNumber, // In: Device number for device to create. Device number must not be in use by an existing virtual disk. For automatic allocation of device number, pass UInt32.MaxValue. Out: Device number for created device.
IntPtr.Zero); // Optional handle to control that can display status messages during operation.
}
else
{
ImDiskAPI.CreateDevice(sizeInBytes, // Size of virtual disk. If this parameter is zero, current size of disk image file will automatically be used as virtual disk size.
0, // Number of tracks per cylinder for virtual disk geometry. This parameter can be zero in which case most reasonable value will be automatically used by the driver.
0, // Number of sectors per track for virtual disk geometry. This parameter can be zero in which case most reasonable value will be automatically used by the driver.
0, // Number of bytes per sector for virtual disk geometry. This parameter can be zero in which case most reasonable value will be automatically used by the driver.
0, // A skip offset if virtual disk data does not begin immediately at start of disk image file. Frequently used with image formats like Nero NRG which start with a file header not used by ImDisk or Windows filesystem drivers.
mode, // Flags specifying properties for virtual disk. See comments for each flag value.
null, // Name of disk image file to use or create. If disk image file already exists the DiskSize parameter can be zero in which case current disk image file size will be used as virtual disk size. If Filename paramter is Nothing/null disk will be created in virtual memory and not backed by a physical disk image file.
false, // Specifies whether Filename parameter specifies a path in Windows native path format, the path format used by drivers in Windows NT kernels, for example \Device\Harddisk0\Partition1\imagefile.img. If this parameter is False path in FIlename parameter will be interpreted as an ordinary user application path.
mountPoint, // Mount point in the form of a drive letter and colon to create for newly created virtual disk. If this parameter is Nothing/null the virtual disk will be created without a drive letter.
ref deviceNumber, // In: Device number for device to create. Device number must not be in use by an existing virtual disk. For automatic allocation of device number, pass UInt32.MaxValue. Out: Device number for created device.
IntPtr.Zero); // Optional handle to control that can display status messages during operation.
}
return(true);
}
catch (Exception) { }
return(false);
}
private static void CreateDevice_Cpl(long diskSize, uint tracksPerCylinder, uint sectorsPerTrack, uint bytesPerSector, long imageOffset,
ImDiskFlags flags, string filename, bool nativePath, string mountPoint, ref uint deviceNumber, IntPtr statusControl)
{
DISK_GEOMETRY diskGeometry = new DISK_GEOMETRY
{
Cylinders = diskSize,
TracksPerCylinder = tracksPerCylinder,
SectorsPerTrack = sectorsPerTrack,
BytesPerSector = bytesPerSector
};
ImDiskCreateDeviceEx(statusControl, ref deviceNumber, ref diskGeometry, ref imageOffset, (uint)flags, filename, nativePath, mountPoint);
}
