Increase the maximum size of vhd from 1TB to 4TB.

Author: hyonholee

src/ServiceManagement/Compute/Sync/Upload/BlobCreatorBase.cs

@@ -39,7 +39,7 @@ public interface ICloudPageBlobObjectFactory
 
     public abstract class BlobCreatorBase
     {
-        private const long OneTeraByte = 1024L * 1024L * 1024L * 1024L;
+        private const long FourTeraByte = 4 * 1024L * 1024L * 1024L * 1024L;
 
         protected FileInfo localVhd;
         protected readonly ICloudPageBlobObjectFactory blobObjectFactory;
@@ -96,10 +96,10 @@ private static void AssertIfValidVhdSize(FileInfo fileInfo)
         {
             using (var stream = new VirtualDiskStream(fileInfo.FullName))
             {
-                if (stream.Length > OneTeraByte)
+                if (stream.Length > FourTeraByte)
                 {
                     var lengthString = stream.Length.ToString("N0", CultureInfo.CurrentCulture);
-                    var expectedLengthString = OneTeraByte.ToString("N0", CultureInfo.CurrentCulture);
+                    var expectedLengthString = FourTeraByte.ToString("N0", CultureInfo.CurrentCulture);
                     string message = String.Format("VHD size is too large ('{0}'), maximum allowed size is '{1}'.", lengthString, expectedLengthString);
                     throw new InvalidOperationException(message);
                 }