creating large windows dummy files

with dos commands, contents with NULL-Bytes:
   fsutil file createnew c:\temp\testfile.dat 4398046511104


with powershell using .NET function, contents with NULL-Bytes:
   $f = new-object System.IO.FileStream c:\temp\testfile.dat, Create, ReadWrite
   $f.SetLength(4500MB)
   $f.Close()

   $path = “C:\temp\testfile.dat”
   $file = [io.file]::Create($path)
   $file.SetLength(4gb)
   $file.Close()
   get-item $path