/// <summary>
/// Creates a new VHD image
/// </summary>
/// <param name="Size">Size of the disk (as seen from the VM)</param>
/// <param name="DiskType">Type of the VHD</param>
/// <param name="Output">Stream to write the image to</param>
/// <param name="Quick">
/// Quick create. Will not write <paramref name="Size"/> bytes but instead just skip.
/// The contents of the skipped range are undefined and depend on the file system the disk is on.
/// On FAT, the parameter does nothing and the system writes bytes for us.
/// On NTFS, the bytes are guaranteed to appear as zero
/// </param>
public static void CreateVHD(ulong Size, VhdType DiskType, Stream Output, bool Quick)
{
var H = new Footer();
H.CurrentSize = H.OriginalSize = Size;
H.DiskGeometry = new CHS(Size);
if (Quick && !Output.CanSeek)
{
throw new ArgumentException($"{nameof(Output)} is not seekable, but {nameof(Quick)} is enabled");
}
switch (DiskType)
{
case VhdType.None:
throw new ArgumentException("'None' is not a valid VHD type");
case VhdType.FixedDisk:
H.Checksum = H.ComputeChecksum();
H.Validate();
SeekOrWrite(Size, Output, Quick);
Output.Write(H.Export(), 0, Footer.HEADER_LENGTH);
break;
case VhdType.DynamicDisk:
case VhdType.DifferencingDisk:
default:
throw new NotImplementedException(nameof(VHD) + "." + nameof(CreateVHD) + $": Disk type {DiskType} is not implemented yet");
}
}
public static VirtualHardDisk Call_NewVHD(string vhdPath, ulong diskSize, uint blockSize = 0, VhdType vhdType = VhdType.Dynamic, string parentPath = null)
{
var parameters = new Dictionary <string, object>
{
{ "Path", vhdPath },
{ "SizeBytes", diskSize }
};
if (blockSize > 0)
{
parameters.Add("BlockSizeBytes", blockSize);
}
switch (vhdType)
{
case VhdType.Differencing:
parameters.Add("Differencing", true);
parameters.Add("ParentPath", parentPath);
break;
case VhdType.Fixed:
parameters.Add("Fixed", true);
break;
case VhdType.Dynamic:
default:
parameters.Add("Dynamic", true);
break;
}
var result = ExecutePowerShell("New-VHD", parameters);
var psObject = result[0];
var vhd = PsObjectToVhdObject(psObject);
return(vhd);
}
public static VirtualHardDisk VhdCreate(this ICakeContext context, FilePath vhdPath, ulong size, uint blockSize, VhdType vhdType)
{
var vhdFullPath = vhdPath.MakeAbsolute(context.Environment).FullPath;
return(PowerShellWrapper.Call_NewVHD(vhdFullPath, size, blockSize, vhdType));
}
