Merge pull request #139 from Sonarr/verified-file-transfer

Verified file transfer

src/NzbDrone.Common.Test/DiskTests/DiskProviderFixtureBase.cs

@@ -10,22 +10,6 @@ namespace NzbDrone.Common.Test.DiskTests
 {
     public abstract class DiskProviderFixtureBase<TSubject> : TestBase<TSubject> where TSubject : class, IDiskProvider
     {
-        public DirectoryInfo GetFilledTempFolder()
-        {
-            var tempFolder = GetTempFilePath();
-            Directory.CreateDirectory(tempFolder);
-
-            File.WriteAllText(Path.Combine(tempFolder, Path.GetRandomFileName()), "RootFile");
-
-            var subDir = Path.Combine(tempFolder, Path.GetRandomFileName());
-            Directory.CreateDirectory(subDir);
-
-            File.WriteAllText(Path.Combine(subDir, Path.GetRandomFileName()), "SubFile1");
-            File.WriteAllText(Path.Combine(subDir, Path.GetRandomFileName()), "SubFile2");
-
-            return new DirectoryInfo(tempFolder);
-        }
-
         [Test]
         public void directory_exist_should_be_able_to_find_existing_folder()
         {
@@ -101,65 +85,9 @@ namespace NzbDrone.Common.Test.DiskTests
 
             File.WriteAllText(source, "SourceFile1");
 
-            Subject.MoveFile(source, source, true);
+            Assert.Throws<IOException>(() => Subject.MoveFile(source, source, true));
 
             File.Exists(source).Should().BeTrue();
-            ExceptionVerification.ExpectedWarns(1);
-        }
-
-        [Test]
-        public void CopyFolder_should_copy_folder()
-        {
-            var source = GetFilledTempFolder();
-            var destination = new DirectoryInfo(GetTempFilePath());
-
-            Subject.CopyFolder(source.FullName, destination.FullName);
-
-            VerifyCopy(source.FullName, destination.FullName);
-        }
-
-        [Test]
-        public void CopyFolder_should_overwrite_existing_folder()
-        {
-            var source = GetFilledTempFolder();
-            var destination = new DirectoryInfo(GetTempFilePath());
-            Subject.CopyFolder(source.FullName, destination.FullName);
-
-            //Delete Random File
-            destination.GetFiles("*.*", SearchOption.AllDirectories).First().Delete();
-
-            Subject.CopyFolder(source.FullName, destination.FullName);
-
-            VerifyCopy(source.FullName, destination.FullName);
-        }
-
-        [Test]
-        public void MoveFolder_should_move_folder()
-        {
-            var original = GetFilledTempFolder();
-            var source = new DirectoryInfo(GetTempFilePath());
-            var destination = new DirectoryInfo(GetTempFilePath());
-
-            Subject.CopyFolder(original.FullName, source.FullName);
-
-            Subject.MoveFolder(source.FullName, destination.FullName);
-
-            VerifyMove(original.FullName, source.FullName, destination.FullName);
-        }
-
-        [Test]
-        public void MoveFolder_should_overwrite_existing_folder()
-        {
-            var original = GetFilledTempFolder();
-            var source = new DirectoryInfo(GetTempFilePath());
-            var destination = new DirectoryInfo(GetTempFilePath());
-
-            Subject.CopyFolder(original.FullName, source.FullName);
-            Subject.CopyFolder(original.FullName, destination.FullName);
-
-            Subject.MoveFolder(source.FullName, destination.FullName);
-
-            VerifyMove(original.FullName, source.FullName, destination.FullName);
         }
 
         [Test]
@@ -194,72 +122,6 @@ namespace NzbDrone.Common.Test.DiskTests
             Directory.Exists(sourceDir).Should().BeFalse();
         }
 
-        [Test]
-        public void should_be_able_to_hardlink_file()
-        {
-            var sourceDir = GetTempFilePath();
-            var source = Path.Combine(sourceDir, "test.txt");
-            var destination = Path.Combine(sourceDir, "destination.txt");
-
-            Directory.CreateDirectory(sourceDir);
-
-            Subject.WriteAllText(source, "SourceFile");
-
-            var result = Subject.TransferFile(source, destination, TransferMode.HardLink);
-
-            result.Should().Be(TransferMode.HardLink);
-
-            File.AppendAllText(source, "Test");
-            File.ReadAllText(destination).Should().Be("SourceFileTest");
-        }
-
-        private void DoHardLinkRename(FileShare fileShare)
-        {
-            var sourceDir = GetTempFilePath();
-            var source = Path.Combine(sourceDir, "test.txt");
-            var destination = Path.Combine(sourceDir, "destination.txt");
-            var rename = Path.Combine(sourceDir, "rename.txt");
-
-            Directory.CreateDirectory(sourceDir);
-
-            Subject.WriteAllText(source, "SourceFile");
-
-            Subject.TransferFile(source, destination, TransferMode.HardLink);
-
-            using (var stream = new FileStream(source, FileMode.Open, FileAccess.Read, fileShare))
-            {
-                stream.ReadByte();
-
-                Subject.MoveFile(destination, rename);
-
-                stream.ReadByte();
-            }
-
-            File.Exists(rename).Should().BeTrue();
-            File.Exists(destination).Should().BeFalse();
-
-            File.AppendAllText(source, "Test");
-            File.ReadAllText(rename).Should().Be("SourceFileTest");
-        }
-
-        [Test]
-        public void should_be_able_to_rename_open_hardlinks_with_fileshare_delete()
-        {
-            DoHardLinkRename(FileShare.Delete);
-        }
-
-        [Test]
-        public void should_not_be_able_to_rename_open_hardlinks_with_fileshare_none()
-        {
-            Assert.Throws<IOException>(() => DoHardLinkRename(FileShare.None));
-        }
-
-        [Test]
-        public void should_not_be_able_to_rename_open_hardlinks_with_fileshare_write()
-        {
-            Assert.Throws<IOException>(() => DoHardLinkRename(FileShare.Read));
-        }
-
         [Test]
         public void empty_folder_should_return_folder_modified_date()
         {
@@ -338,14 +200,6 @@ namespace NzbDrone.Common.Test.DiskTests
             Subject.FileGetLastWrite(testFile).Should().Be(lastWriteTime);
         }
 
-        [Test]
-        [Explicit]
-        public void check_last_write()
-        {
-            Console.WriteLine(Subject.FolderGetLastWrite(GetFilledTempFolder().FullName));
-            Console.WriteLine(GetFilledTempFolder().LastWriteTimeUtc);
-        }
-
         [Test]
         public void GetParentFolder_should_remove_trailing_slash_before_getting_parent_folder()
         {
@@ -355,22 +209,51 @@ namespace NzbDrone.Common.Test.DiskTests
             Subject.GetParentFolder(path).Should().Be(parent);
         }
 
-        private void VerifyCopy(string source, string destination)
+        private void DoHardLinkRename(FileShare fileShare)
+        {
+            var sourceDir = GetTempFilePath();
+            var source = Path.Combine(sourceDir, "test.txt");
+            var destination = Path.Combine(sourceDir, "destination.txt");
+            var rename = Path.Combine(sourceDir, "rename.txt");
+
+            Directory.CreateDirectory(sourceDir);
+
+            File.WriteAllText(source, "SourceFile");
+
+            Subject.TryCreateHardLink(source, destination).Should().BeTrue();
+
+            using (var stream = new FileStream(source, FileMode.Open, FileAccess.Read, fileShare))
             {
-            var sourceFiles = Directory.GetFileSystemEntries(source, "*", SearchOption.AllDirectories).Select(v => v.Substring(source.Length + 1)).ToArray();
+                stream.ReadByte();
-            var destFiles = Directory.GetFileSystemEntries(destination, "*", SearchOption.AllDirectories).Select(v => v.Substring(destination.Length + 1)).ToArray();
+
+                Subject.MoveFile(destination, rename);
+
+                stream.ReadByte();
+            }
+
+            File.Exists(rename).Should().BeTrue();
+            File.Exists(destination).Should().BeFalse();
 
-            CollectionAssert.AreEquivalent(sourceFiles, destFiles);
+            File.AppendAllText(source, "Test");
+            File.ReadAllText(rename).Should().Be("SourceFileTest");
         }
 
-        private void VerifyMove(string source, string from, string destination)
+        [Test]
+        public void should_be_able_to_rename_open_hardlinks_with_fileshare_delete()
         {
-            Directory.Exists(from).Should().BeFalse();
+            DoHardLinkRename(FileShare.Delete);
+        }
 
-            var sourceFiles = Directory.GetFileSystemEntries(source, "*", SearchOption.AllDirectories).Select(v => v.Substring(source.Length + 1)).ToArray();
+        [Test]
-            var destFiles = Directory.GetFileSystemEntries(destination, "*", SearchOption.AllDirectories).Select(v => v.Substring(destination.Length + 1)).ToArray();
+        public void should_not_be_able_to_rename_open_hardlinks_with_fileshare_none()
+        {
+            Assert.Throws<IOException>(() => DoHardLinkRename(FileShare.None));
+        }
 
-            CollectionAssert.AreEquivalent(sourceFiles, destFiles);
+        [Test]
+        public void should_not_be_able_to_rename_open_hardlinks_with_fileshare_write()
+        {
+            Assert.Throws<IOException>(() => DoHardLinkRename(FileShare.Read));
         }
     }
 }

src/NzbDrone.Common.Test/DiskTests/DiskTransferServiceFixture.cs

@@ -0,0 +1,416 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using Moq;
+using NUnit.Framework;
+using NzbDrone.Common.Disk;
+using NzbDrone.Test.Common;
+using FluentAssertions;
+
+namespace NzbDrone.Common.Test.DiskTests
+{
+    [TestFixture]
+    public class DiskTransferServiceFixture : TestBase<DiskTransferService>
+    {
+        private readonly String _sourcePath = @"C:\source\my.video.mkv".AsOsAgnostic();
+        private readonly String _targetPath = @"C:\target\my.video.mkv".AsOsAgnostic();
+        private readonly String _backupPath = @"C:\source\my.video.mkv.backup~".AsOsAgnostic();
+        private readonly String _tempTargetPath = @"C:\target\my.video.mkv.partial~".AsOsAgnostic();
+
+        [SetUp]
+        public void SetUp()
+        {
+            Mocker.GetMock<IDiskProvider>(MockBehavior.Strict);
+
+            WithEmulatedDiskProvider();
+
+            WithExistingFile(_sourcePath);
+        }
+
+        [Test]
+        public void should_hardlink_only()
+        {
+            WithSuccessfulHardlink(_sourcePath, _targetPath);
+
+            var result = Subject.TransferFile(_sourcePath, _targetPath, TransferMode.HardLink);
+
+            result.Should().Be(TransferMode.HardLink);
+        }
+
+        [Test]
+        public void should_throw_if_hardlink_only_failed()
+        {
+            WithFailedHardlink();
+
+            Assert.Throws<IOException>(() => Subject.TransferFile(_sourcePath, _targetPath, TransferMode.HardLink));
+        }
+
+        [Test]
+        public void should_not_use_verified_transfer_on_windows()
+        {
+            WindowsOnly();
+
+            var result = Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Move);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Verify(v => v.TryCreateHardLink(_sourcePath, _backupPath), Times.Never());
+
+            Mocker.GetMock<IDiskProvider>()
+                .Verify(v => v.MoveFile(_sourcePath, _targetPath, false), Times.Once());
+        }
+
+        [Test]
+        public void should_retry_if_partial_copy()
+        {
+            MonoOnly();
+
+            var retry = 0;
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.CopyFile(_sourcePath, _tempTargetPath, false))
+                .Callback(() =>
+                    {
+                        WithExistingFile(_tempTargetPath, true, 900);
+                        if (retry++ == 1) WithExistingFile(_tempTargetPath, true, 1000);
+                    });
+
+            var result = Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Copy);
+
+            ExceptionVerification.ExpectedWarns(1);
+        }
+
+        [Test]
+        public void should_retry_twice_if_partial_copy()
+        {
+            MonoOnly();
+
+            var retry = 0;
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.CopyFile(_sourcePath, _tempTargetPath, false))
+                .Callback(() =>
+                    {
+                        WithExistingFile(_tempTargetPath, true, 900);
+                        if (retry++ == 3) throw new Exception("Test Failed, retried too many times.");
+                    });
+
+            Assert.Throws<IOException>(() => Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Copy));
+
+            ExceptionVerification.ExpectedWarns(2);
+            ExceptionVerification.ExpectedErrors(1);
+        }
+
+        [Test]
+        public void should_hardlink_before_move()
+        {
+            MonoOnly();
+
+            WithSuccessfulHardlink(_sourcePath, _backupPath);
+
+            var result = Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Move);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Verify(v => v.TryCreateHardLink(_sourcePath, _backupPath), Times.Once());
+        }
+
+        [Test]
+        public void should_remove_source_after_move()
+        {
+            MonoOnly();
+
+            WithSuccessfulHardlink(_sourcePath, _backupPath);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.MoveFile(_backupPath, _tempTargetPath, false))
+                .Callback(() => WithExistingFile(_tempTargetPath, true));
+
+            var result = Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Move);
+
+            VerifyDeletedFile(_sourcePath);
+        }
+
+        [Test]
+        public void should_remove_backup_if_move_throws()
+        {
+            MonoOnly();
+
+            WithSuccessfulHardlink(_sourcePath, _backupPath);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.MoveFile(_backupPath, _tempTargetPath, false))
+                .Throws(new IOException("Blackbox IO error"));
+
+            Assert.Throws<IOException>(() => Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Move));
+
+            VerifyDeletedFile(_backupPath);
+        }
+
+        [Test]
+        public void should_remove_partial_if_move_fails()
+        {
+            MonoOnly();
+
+            WithSuccessfulHardlink(_sourcePath, _backupPath);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.MoveFile(_backupPath, _tempTargetPath, false))
+                .Callback(() =>
+                {
+                    WithExistingFile(_backupPath, false);
+                    WithExistingFile(_tempTargetPath, true, 900);
+                });
+
+            Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Move);
+
+            VerifyDeletedFile(_tempTargetPath);
+        }
+
+        [Test]
+        public void should_fallback_to_copy_if_hardlink_failed()
+        {
+            MonoOnly();
+
+            WithFailedHardlink();
+
+            var result = Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Move);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Verify(v => v.CopyFile(_sourcePath, _tempTargetPath, false), Times.Once());
+
+            Mocker.GetMock<IDiskProvider>()
+                .Verify(v => v.MoveFile(_tempTargetPath, _targetPath, false), Times.Once());
+
+            VerifyDeletedFile(_sourcePath);
+        }
+
+        [Test]
+        public void CopyFolder_should_copy_folder()
+        {
+            WithRealDiskProvider();
+
+            var source = GetFilledTempFolder();
+            var destination = new DirectoryInfo(GetTempFilePath());
+
+            Subject.TransferFolder(source.FullName, destination.FullName, TransferMode.Copy);
+
+            VerifyCopyFolder(source.FullName, destination.FullName);
+        }
+
+        [Test]
+        public void CopyFolder_should_overwrite_existing_folder()
+        {
+            WithRealDiskProvider();
+
+            var source = GetFilledTempFolder();
+            var destination = new DirectoryInfo(GetTempFilePath());
+            Subject.TransferFolder(source.FullName, destination.FullName, TransferMode.Copy);
+
+            //Delete Random File
+            destination.GetFiles("*.*", SearchOption.AllDirectories).First().Delete();
+
+            Subject.TransferFolder(source.FullName, destination.FullName, TransferMode.Copy);
+
+            VerifyCopyFolder(source.FullName, destination.FullName);
+        }
+
+
+        [Test]
+        public void MoveFolder_should_move_folder()
+        {
+            WithRealDiskProvider();
+
+            var original = GetFilledTempFolder();
+            var source = new DirectoryInfo(GetTempFilePath());
+            var destination = new DirectoryInfo(GetTempFilePath());
+
+            Subject.TransferFolder(original.FullName, source.FullName, TransferMode.Copy);
+
+            Subject.TransferFolder(source.FullName, destination.FullName, TransferMode.Move);
+
+            VerifyMoveFolder(original.FullName, source.FullName, destination.FullName);
+        }
+
+        [Test]
+        public void MoveFolder_should_overwrite_existing_folder()
+        {
+            WithRealDiskProvider();
+
+            var original = GetFilledTempFolder();
+            var source = new DirectoryInfo(GetTempFilePath());
+            var destination = new DirectoryInfo(GetTempFilePath());
+
+            Subject.TransferFolder(original.FullName, source.FullName, TransferMode.Copy);
+            Subject.TransferFolder(original.FullName, destination.FullName, TransferMode.Copy);
+
+            Subject.TransferFolder(source.FullName, destination.FullName, TransferMode.Move);
+
+            VerifyMoveFolder(original.FullName, source.FullName, destination.FullName);
+        }
+
+        [Test]
+        public void should_throw_if_destination_is_readonly()
+        {
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.CopyFile(It.IsAny<string>(), It.IsAny<string>(), false))
+                .Throws(new IOException("Access denied"));
+
+            Assert.Throws<IOException>(() => Subject.TransferFile(_sourcePath, _targetPath, TransferMode.Copy));
+        }
+
+        [Test]
+        public void should_throw_if_destination_is_child_of_source()
+        {
+            var childPath = Path.Combine(_sourcePath, "child");
+
+            Assert.Throws<IOException>(() => Subject.TransferFile(_sourcePath, childPath, TransferMode.Move));
+        }
+
+        public DirectoryInfo GetFilledTempFolder()
+        {
+            var tempFolder = GetTempFilePath();
+            Directory.CreateDirectory(tempFolder);
+
+            File.WriteAllText(Path.Combine(tempFolder, Path.GetRandomFileName()), "RootFile");
+
+            var subDir = Path.Combine(tempFolder, Path.GetRandomFileName());
+            Directory.CreateDirectory(subDir);
+
+            File.WriteAllText(Path.Combine(subDir, Path.GetRandomFileName()), "SubFile1");
+            File.WriteAllText(Path.Combine(subDir, Path.GetRandomFileName()), "SubFile2");
+
+            return new DirectoryInfo(tempFolder);
+        }
+
+        private void WithExistingFile(string path, bool exists = true, int size = 1000)
+        {
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.FileExists(path))
+                .Returns(exists);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.GetFileSize(path))
+                .Returns(size);
+        }
+
+        private void WithSuccessfulHardlink(string source, string target)
+        {
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.TryCreateHardLink(source, target))
+                .Callback(() => WithExistingFile(target))
+                .Returns(true);
+        }
+
+        private void WithFailedHardlink()
+        {
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.TryCreateHardLink(It.IsAny<String>(), It.IsAny<String>()))
+                .Returns(false);
+        }
+
+        private void WithEmulatedDiskProvider()
+        {
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.FileExists(It.IsAny<string>()))
+                .Returns(false);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.CopyFile(It.IsAny<string>(), It.IsAny<string>(), false))
+                .Callback<string, string, bool>((s, d, o) =>
+                {
+                    WithExistingFile(d);
+                });
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.MoveFile(It.IsAny<string>(), It.IsAny<string>(), false))
+                .Callback<string, string, bool>((s, d, o) =>
+                {
+                    WithExistingFile(s, false);
+                    WithExistingFile(d);
+                });
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.DeleteFile(It.IsAny<string>()))
+                .Callback<string>(v =>
+                {
+                    WithExistingFile(v, false);
+                });
+        }
+
+        private void WithRealDiskProvider()
+        {
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.FolderExists(It.IsAny<string>()))
+                .Returns<string>(v => Directory.Exists(v));
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.FileExists(It.IsAny<string>()))
+                .Returns<string>(v => File.Exists(v));
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.CreateFolder(It.IsAny<string>()))
+                .Callback<string>(v => Directory.CreateDirectory(v));
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.DeleteFolder(It.IsAny<string>(), It.IsAny<bool>()))
+                .Callback<string, bool>((v,r) => Directory.Delete(v, r));
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.DeleteFile(It.IsAny<string>()))
+                .Callback<string>(v => File.Delete(v));
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.GetDirectoryInfos(It.IsAny<string>()))
+                .Returns<string>(v => new DirectoryInfo(v).GetDirectories().ToList());
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.GetFileInfos(It.IsAny<string>()))
+                .Returns<string>(v => new DirectoryInfo(v).GetFiles().ToList());
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.GetFileSize(It.IsAny<string>()))
+                .Returns<string>(v => new FileInfo(v).Length);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.TryCreateHardLink(It.IsAny<string>(), It.IsAny<string>()))
+                .Returns(false);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.CopyFile(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<bool>()))
+                .Callback<string, string, bool>((s, d, o) => File.Copy(s, d, o));
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(v => v.MoveFile(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<bool>()))
+                .Callback<string, string, bool>((s,d,o) => {
+                    if (File.Exists(d) && o) File.Delete(d);
+                    File.Move(s, d);
+                });
+            
+        }
+
+        private void VerifyCopyFolder(string source, string destination)
+        {
+            var sourceFiles = Directory.GetFileSystemEntries(source, "*", SearchOption.AllDirectories).Select(v => v.Substring(source.Length + 1)).ToArray();
+            var destFiles = Directory.GetFileSystemEntries(destination, "*", SearchOption.AllDirectories).Select(v => v.Substring(destination.Length + 1)).ToArray();
+
+            CollectionAssert.AreEquivalent(sourceFiles, destFiles);
+        }
+
+        private void VerifyMoveFolder(string source, string from, string destination)
+        {
+            Directory.Exists(from).Should().BeFalse();
+
+            var sourceFiles = Directory.GetFileSystemEntries(source, "*", SearchOption.AllDirectories).Select(v => v.Substring(source.Length + 1)).ToArray();
+            var destFiles = Directory.GetFileSystemEntries(destination, "*", SearchOption.AllDirectories).Select(v => v.Substring(destination.Length + 1)).ToArray();
+
+            CollectionAssert.AreEquivalent(sourceFiles, destFiles);
+        }
+
+        private void VerifyDeletedFile(String filePath)
+        {
+            var path = filePath;
+
+            Mocker.GetMock<IDiskProvider>()
+                .Verify(v => v.DeleteFile(path), Times.Once());
+        }
+    }
+}

src/NzbDrone.Common.Test/NzbDrone.Common.Test.csproj

@@ -72,6 +72,7 @@
     <Compile Include="DiskTests\DiskProviderFixtureBase.cs" />
     <Compile Include="DiskTests\FreeSpaceFixtureBase.cs" />
     <Compile Include="DiskTests\IsParentFixtureBase.cs" />
+    <Compile Include="DiskTests\DiskTransferServiceFixture.cs" />
     <Compile Include="EnsureTest\PathExtensionFixture.cs" />
     <Compile Include="EnvironmentProviderTest.cs" />
     <Compile Include="EnvironmentTests\EnvironmentProviderTest.cs" />

src/NzbDrone.Common/Disk/DiskProviderBase.cs

@@ -168,62 +168,6 @@ namespace NzbDrone.Common.Disk
             Directory.CreateDirectory(path);
         }
 
-        public void CopyFolder(string source, string destination)
-        {
-            Ensure.That(source, () => source).IsValidPath();
-            Ensure.That(destination, () => destination).IsValidPath();
-
-            TransferFolder(source, destination, TransferMode.Copy);
-        }
-
-        public void MoveFolder(string source, string destination)
-        {
-            Ensure.That(source, () => source).IsValidPath();
-            Ensure.That(destination, () => destination).IsValidPath();
-
-            try
-            {
-                TransferFolder(source, destination, TransferMode.Move);
-                DeleteFolder(source, true);
-            }
-            catch (Exception e)
-            {
-                e.Data.Add("Source", source);
-                e.Data.Add("Destination", destination);
-                throw;
-            }
-        }
-
-        public void TransferFolder(string source, string destination, TransferMode mode)
-        {
-            Ensure.That(source, () => source).IsValidPath();
-            Ensure.That(destination, () => destination).IsValidPath();
-
-            Logger.ProgressDebug("{0} {1} -> {2}", mode, source, destination);
-
-            var sourceFolder = new DirectoryInfo(source);
-            var targetFolder = new DirectoryInfo(destination);
-
-            if (!targetFolder.Exists)
-            {
-                targetFolder.Create();
-            }
-
-            foreach (var subDir in sourceFolder.GetDirectories())
-            {
-                TransferFolder(subDir.FullName, Path.Combine(destination, subDir.Name), mode);
-            }
-
-            foreach (var sourceFile in sourceFolder.GetFiles("*.*", SearchOption.TopDirectoryOnly))
-            {
-                var destFile = Path.Combine(destination, sourceFile.Name);
-
-                Logger.ProgressDebug("{0} {1} -> {2}", mode, sourceFile, destFile);
-
-                TransferFile(sourceFile.FullName, destFile, mode, true);
-            }
-        }
-
         public void DeleteFile(string path)
         {
             Ensure.That(path, () => path).IsValidPath();
@@ -236,23 +180,25 @@ namespace NzbDrone.Common.Disk
 
         public void CopyFile(string source, string destination, bool overwrite = false)
         {
-            TransferFile(source, destination, TransferMode.Copy, overwrite);
+            Ensure.That(source, () => source).IsValidPath();
-        }
+            Ensure.That(destination, () => destination).IsValidPath();
 
-        public void MoveFile(string source, string destination, bool overwrite = false)
+            if (source.PathEquals(destination))
             {
-            TransferFile(source, destination, TransferMode.Move, overwrite);
+                throw new IOException(string.Format("Source and destination can't be the same {0}", source));
+            }
+
+            File.Copy(source, destination, overwrite);
         }
 
-        public TransferMode TransferFile(string source, string destination, TransferMode mode, bool overwrite)
+        public void MoveFile(string source, string destination, bool overwrite = false)
         {
             Ensure.That(source, () => source).IsValidPath();
             Ensure.That(destination, () => destination).IsValidPath();
 
             if (source.PathEquals(destination))
             {
-                Logger.Warn("Source and destination can't be the same {0}", source);
+                throw new IOException(string.Format("Source and destination can't be the same {0}", source));
-                return TransferMode.None;
             }
 
             if (FileExists(destination) && overwrite)
@@ -260,33 +206,8 @@ namespace NzbDrone.Common.Disk
                 DeleteFile(destination);
             }
 
-            if (mode.HasFlag(TransferMode.HardLink))
-            {
-                bool createdHardlink = TryCreateHardLink(source, destination);
-                if (createdHardlink)
-                {
-                    return TransferMode.HardLink;
-                }
-                if (!mode.HasFlag(TransferMode.Copy))
-                {
-                    throw new IOException("Hardlinking from '" + source + "' to '" + destination + "' failed.");
-                }
-            }
-
-            if (mode.HasFlag(TransferMode.Copy))
-            {
-                File.Copy(source, destination, overwrite);
-                return TransferMode.Copy;
-            }
-
-            if (mode.HasFlag(TransferMode.Move))
-            {
             RemoveReadOnly(source);
             File.Move(source, destination);
-                return TransferMode.Move;
-            }
-
-            return TransferMode.None;
         }
 
         public abstract bool TryCreateHardLink(string source, string destination);

src/NzbDrone.Common/Disk/DiskTransferService.cs

@@ -0,0 +1,254 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using NLog;
+using NzbDrone.Common.EnsureThat;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Common.Extensions;
+
+namespace NzbDrone.Common.Disk
+{
+    public interface IDiskTransferService
+    {
+        TransferMode TransferFolder(String sourcePath, String targetPath, TransferMode mode, bool verified = true);
+        TransferMode TransferFile(String sourcePath, String targetPath, TransferMode mode, bool overwrite = false, bool verified = true);
+    }
+
+    public class DiskTransferService : IDiskTransferService
+    {
+        private const Int32 RetryCount = 2;
+
+        private readonly IDiskProvider _diskProvider;
+        private readonly Logger _logger;
+
+        public DiskTransferService(IDiskProvider diskProvider, Logger logger)
+        {
+            _diskProvider = diskProvider;
+            _logger = logger;
+        }
+
+        public TransferMode TransferFolder(String sourcePath, String targetPath, TransferMode mode, bool verified = true)
+        {
+            Ensure.That(sourcePath, () => sourcePath).IsValidPath();
+            Ensure.That(targetPath, () => targetPath).IsValidPath();
+
+            if (OsInfo.IsWindows)
+            {
+                // TODO: Atm we haven't seen partial transfers on windows so we disable verified transfer.
+                // (If enabled in the future, be sure to check specifically for ReFS, which doesn't support hardlinks.)
+                verified = false;
+            }
+
+            if (!_diskProvider.FolderExists(targetPath))
+            {
+                _diskProvider.CreateFolder(targetPath);
+            }
+
+            var result = mode;
+
+            foreach (var subDir in _diskProvider.GetDirectoryInfos(sourcePath))
+            {
+                result &= TransferFolder(subDir.FullName, Path.Combine(targetPath, subDir.Name), mode, verified);
+            }
+
+            foreach (var sourceFile in _diskProvider.GetFileInfos(sourcePath))
+            {
+                var destFile = Path.Combine(targetPath, sourceFile.Name);
+
+                result &= TransferFile(sourceFile.FullName, destFile, mode, true, verified);
+            }
+
+            if (mode.HasFlag(TransferMode.Move))
+            {
+                _diskProvider.DeleteFolder(sourcePath, true);
+            }
+
+            return result;
+        }
+
+        public TransferMode TransferFile(String sourcePath, String targetPath, TransferMode mode, bool overwrite = false, bool verified = true)
+        {
+            Ensure.That(sourcePath, () => sourcePath).IsValidPath();
+            Ensure.That(targetPath, () => targetPath).IsValidPath();
+
+            if (OsInfo.IsWindows)
+            {
+                // TODO: Atm we haven't seen partial transfers on windows so we disable verified transfer.
+                // (If enabled in the future, be sure to check specifically for ReFS, which doesn't support hardlinks.)
+                verified = false;
+            }
+
+            _logger.Debug("{0} [{1}] > [{2}]", mode, sourcePath, targetPath);
+
+            if (sourcePath.PathEquals(targetPath))
+            {
+                throw new IOException(string.Format("Source and destination can't be the same {0}", sourcePath));
+            }
+
+            if (sourcePath.IsParentPath(targetPath))
+            {
+                throw new IOException(string.Format("Destination cannot be a child of the source [{0}] => [{1}]", sourcePath, targetPath));
+            }
+
+            if (_diskProvider.FileExists(targetPath) && overwrite)
+            {
+                _diskProvider.DeleteFile(targetPath);
+            }
+
+            if (mode.HasFlag(TransferMode.HardLink))
+            {
+                var createdHardlink = _diskProvider.TryCreateHardLink(sourcePath, targetPath);
+                if (createdHardlink)
+                {
+                    return TransferMode.HardLink;
+                }
+                if (!mode.HasFlag(TransferMode.Copy))
+                {
+                    throw new IOException("Hardlinking from '" + sourcePath + "' to '" + targetPath + "' failed.");
+                }
+            }
+
+            if (verified)
+            {
+                if (mode.HasFlag(TransferMode.Copy))
+                {
+                    if (TryCopyFile(sourcePath, targetPath))
+                    {
+                        return TransferMode.Copy;
+                    }
+                }
+
+                if (mode.HasFlag(TransferMode.Move))
+                {
+                    if (TryMoveFile(sourcePath, targetPath))
+                    {
+                        return TransferMode.Move;
+                    }
+                }
+
+                throw new IOException(String.Format("Failed to completely transfer [{0}] to [{1}], aborting.", sourcePath, targetPath));
+            }
+            else
+            {
+                if (mode.HasFlag(TransferMode.Copy))
+                {
+                    _diskProvider.CopyFile(sourcePath, targetPath);
+                    return TransferMode.Copy;
+                }
+
+                if (mode.HasFlag(TransferMode.Move))
+                {
+                    _diskProvider.MoveFile(sourcePath, targetPath);
+                    return TransferMode.Move;
+                }
+            }
+
+            return TransferMode.None;
+        }
+
+        private Boolean TryCopyFile(String sourcePath, String targetPath)
+        {
+            var originalSize = _diskProvider.GetFileSize(sourcePath);
+
+            var tempTargetPath = targetPath + ".partial~";
+
+            for (var i = 0; i <= RetryCount; i++)
+            {
+                _diskProvider.CopyFile(sourcePath, tempTargetPath);
+
+                if (_diskProvider.FileExists(tempTargetPath))
+                {
+                    var targetSize = _diskProvider.GetFileSize(tempTargetPath);
+
+                    if (targetSize == originalSize)
+                    {
+                        _diskProvider.MoveFile(tempTargetPath, targetPath);
+                        return true;
+                    }
+                }
+
+                Thread.Sleep(5000);
+
+                _diskProvider.DeleteFile(tempTargetPath);
+
+                if (i == RetryCount)
+                {
+                    _logger.Error("Failed to completely transfer [{0}] to [{1}], aborting.", sourcePath, targetPath, i + 1, RetryCount);
+                }
+                else
+                {
+                    _logger.Warn("Failed to completely transfer [{0}] to [{1}], retrying [{2}/{3}].", sourcePath, targetPath, i + 1, RetryCount);
+                }
+            }
+
+            return false;
+        }
+
+        private Boolean TryMoveFile(String sourcePath, String targetPath)
+        {
+            var originalSize = _diskProvider.GetFileSize(sourcePath);
+
+            var backupPath = sourcePath + ".backup~";
+            var tempTargetPath = targetPath + ".partial~";
+
+            if (_diskProvider.FileExists(backupPath))
+            {
+                _logger.Trace("Removing old backup.");
+                _diskProvider.DeleteFile(backupPath);
+            }
+
+            if (_diskProvider.FileExists(tempTargetPath))
+            {
+                _logger.Trace("Removing old partial.");
+                _diskProvider.DeleteFile(tempTargetPath);
+            }
+
+            try
+            {
+                _logger.Trace("Attempting to move hardlinked backup.");
+                if (_diskProvider.TryCreateHardLink(sourcePath, backupPath))
+                {
+                    _diskProvider.MoveFile(backupPath, tempTargetPath);
+
+                    if (_diskProvider.FileExists(tempTargetPath))
+                    {
+                        var targetSize = _diskProvider.GetFileSize(tempTargetPath);
+
+                        if (targetSize == originalSize)
+                        {
+                            _diskProvider.MoveFile(tempTargetPath, targetPath);
+                            _logger.Trace("Hardlink move succeeded, deleting source.");
+                            _diskProvider.DeleteFile(sourcePath);
+                            return true;
+                        }
+                    }
+
+                    Thread.Sleep(5000);
+
+                    _diskProvider.DeleteFile(tempTargetPath);
+                }
+            }
+            finally
+            {
+                if (_diskProvider.FileExists(backupPath))
+                {
+                    _diskProvider.DeleteFile(backupPath);
+                }
+            }
+
+            _logger.Trace("Hardlink move failed, reverting to copy.");
+            if (TryCopyFile(sourcePath, targetPath))
+            {
+                _logger.Trace("Copy succeeded, deleting source.");
+                _diskProvider.DeleteFile(sourcePath);
+                return true;
+            }
+
+            _logger.Trace("Copy failed.");
+            return false;
+        }
+    }
+}

src/NzbDrone.Common/Disk/IDiskProvider.cs

@@ -25,13 +25,9 @@ namespace NzbDrone.Common.Disk
         long GetFolderSize(string path);
         long GetFileSize(string path);
         void CreateFolder(string path);
-        void CopyFolder(string source, string destination);
-        void MoveFolder(string source, string destination);
-        void TransferFolder(string source, string destination, TransferMode transferMode);
         void DeleteFile(string path);
         void CopyFile(string source, string destination, bool overwrite = false);
         void MoveFile(string source, string destination, bool overwrite = false);
-        TransferMode TransferFile(string source, string destination, TransferMode transferMode, bool overwrite = false);
         bool TryCreateHardLink(string source, string destination);
         void DeleteFolder(string path, bool recursive);
         string ReadAllText(string filePath);

src/NzbDrone.Common/NzbDrone.Common.csproj

@@ -79,6 +79,7 @@
     <Compile Include="Disk\OsPath.cs" />
     <Compile Include="Disk\DiskProviderBase.cs" />
     <Compile Include="Disk\IDiskProvider.cs" />
+    <Compile Include="Disk\DiskTransferService.cs" />
     <Compile Include="Disk\TransferMode.cs" />
     <Compile Include="EnsureThat\Ensure.cs" />
     <Compile Include="EnsureThat\EnsureBoolExtensions.cs" />

src/NzbDrone.Core.Test/ProviderTests/RecycleBinProviderTests/DeleteDirectoryFixture.cs

@@ -45,7 +45,8 @@ namespace NzbDrone.Core.Test.ProviderTests.RecycleBinProviderTests
 
             Mocker.Resolve<RecycleBinProvider>().DeleteFolder(path);
 
-            Mocker.GetMock<IDiskProvider>().Verify(v => v.MoveFolder(path, @"C:\Test\Recycle Bin\30 Rock".AsOsAgnostic()), Times.Once());
+            Mocker.GetMock<IDiskTransferService>()
+                  .Verify(v => v.TransferFolder(path, @"C:\Test\Recycle Bin\30 Rock".AsOsAgnostic(), TransferMode.Move, true), Times.Once());
         }
 
         [Test]

src/NzbDrone.Core.Test/ProviderTests/RecycleBinProviderTests/DeleteFileFixture.cs

@@ -44,7 +44,7 @@ namespace NzbDrone.Core.Test.ProviderTests.RecycleBinProviderTests
 
             Mocker.Resolve<RecycleBinProvider>().DeleteFile(path);
 
-            Mocker.GetMock<IDiskProvider>().Verify(v => v.MoveFile(path, @"C:\Test\Recycle Bin\S01E01.avi".AsOsAgnostic(), true), Times.Once());
+            Mocker.GetMock<IDiskTransferService>().Verify(v => v.TransferFile(path, @"C:\Test\Recycle Bin\S01E01.avi".AsOsAgnostic(), TransferMode.Move, false, true), Times.Once());
         }
 
         [Test]
@@ -60,7 +60,7 @@ namespace NzbDrone.Core.Test.ProviderTests.RecycleBinProviderTests
 
             Mocker.Resolve<RecycleBinProvider>().DeleteFile(path);
 
-            Mocker.GetMock<IDiskProvider>().Verify(v => v.MoveFile(path, @"C:\Test\Recycle Bin\S01E01_2.avi".AsOsAgnostic(), true), Times.Once());
+            Mocker.GetMock<IDiskTransferService>().Verify(v => v.TransferFile(path, @"C:\Test\Recycle Bin\S01E01_2.avi".AsOsAgnostic(), TransferMode.Move, false, true), Times.Once());
         }
 
         [Test]

src/NzbDrone.Core.Test/TvTests/MoveSeriesServiceFixture.cs

@@ -39,8 +39,8 @@ namespace NzbDrone.Core.Test.TvTests
 
         private void GivenFailedMove()
         {
-            Mocker.GetMock<IDiskProvider>()
+            Mocker.GetMock<IDiskTransferService>()
-                  .Setup(s => s.MoveFolder(It.IsAny<String>(), It.IsAny<String>()))
+                  .Setup(s => s.TransferFolder(It.IsAny<String>(), It.IsAny<String>(), TransferMode.Move, true))
                   .Throws<IOException>();
         }
 

src/NzbDrone.Core.Test/UpdateTests/UpdateServiceFixture.cs

@@ -135,7 +135,8 @@ namespace NzbDrone.Core.Test.UpdateTests
 
             Subject.Execute(new ApplicationUpdateCommand());
 
-            Mocker.GetMock<IDiskProvider>().Verify(c => c.MoveFolder(updateClientFolder, _sandboxFolder));
+            Mocker.GetMock<IDiskTransferService>()
+                  .Verify(c => c.TransferFolder(updateClientFolder, _sandboxFolder, TransferMode.Move, false));
         }
 
         [Test]

src/NzbDrone.Core/Backup/BackupService.cs

@@ -25,6 +25,7 @@ namespace NzbDrone.Core.Backup
     public class BackupService : IBackupService, IExecute<BackupCommand>
     {
         private readonly IMainDatabase _maindDb;
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IDiskProvider _diskProvider;
         private readonly IAppFolderInfo _appFolderInfo;
         private readonly IArchiveService _archiveService;
@@ -35,12 +36,14 @@ namespace NzbDrone.Core.Backup
         private static readonly Regex BackupFileRegex = new Regex(@"nzbdrone_backup_[._0-9]+\.zip", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         public BackupService(IMainDatabase maindDb,
+                             IDiskTransferService diskTransferService,
                              IDiskProvider diskProvider,
                              IAppFolderInfo appFolderInfo,
                              IArchiveService archiveService,
                              Logger logger)
         {
             _maindDb = maindDb;
+            _diskTransferService = diskTransferService;
             _diskProvider = diskProvider;
             _appFolderInfo = appFolderInfo;
             _archiveService = archiveService;
@@ -115,7 +118,7 @@ namespace NzbDrone.Core.Backup
                 var databaseFile = _appFolderInfo.GetNzbDroneDatabase();
                 var tempDatabaseFile = Path.Combine(_backupTempFolder, Path.GetFileName(databaseFile));
 
-                _diskProvider.CopyFile(databaseFile, tempDatabaseFile, true);
+                _diskTransferService.TransferFile(databaseFile, tempDatabaseFile, TransferMode.Copy);
 
                 unitOfWork.Commit();
             }
@@ -128,7 +131,7 @@ namespace NzbDrone.Core.Backup
             var configFile = _appFolderInfo.GetConfigPath();
             var tempConfigFile = Path.Combine(_backupTempFolder, Path.GetFileName(configFile));
 
-            _diskProvider.CopyFile(configFile, tempConfigFile, true);
+            _diskTransferService.TransferFile(configFile, tempConfigFile, TransferMode.Copy);
         }
 
         private void CleanupOldBackups(BackupType backupType)

src/NzbDrone.Core/MediaFiles/EpisodeFileMovingService.cs

@@ -27,6 +27,7 @@ namespace NzbDrone.Core.MediaFiles
         private readonly IEpisodeService _episodeService;
         private readonly IUpdateEpisodeFileService _updateEpisodeFileService;
         private readonly IBuildFileNames _buildFileNames;
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IDiskProvider _diskProvider;
         private readonly IMediaFileAttributeService _mediaFileAttributeService;
         private readonly IEventAggregator _eventAggregator;
@@ -36,6 +37,7 @@ namespace NzbDrone.Core.MediaFiles
         public EpisodeFileMovingService(IEpisodeService episodeService,
                                 IUpdateEpisodeFileService updateEpisodeFileService,
                                 IBuildFileNames buildFileNames,
+                                IDiskTransferService diskTransferService,
                                 IDiskProvider diskProvider,
                                 IMediaFileAttributeService mediaFileAttributeService,
                                 IEventAggregator eventAggregator,
@@ -45,6 +47,7 @@ namespace NzbDrone.Core.MediaFiles
             _episodeService = episodeService;
             _updateEpisodeFileService = updateEpisodeFileService;
             _buildFileNames = buildFileNames;
+            _diskTransferService = diskTransferService;
             _diskProvider = diskProvider;
             _mediaFileAttributeService = mediaFileAttributeService;
             _eventAggregator = eventAggregator;
@@ -112,8 +115,7 @@ namespace NzbDrone.Core.MediaFiles
                 throw new SameFilenameException("File not moved, source and destination are the same", episodeFilePath);
             }
 
-            _logger.Debug("{0} [{1}] > [{2}]", mode, episodeFilePath, destinationFilename);
+            _diskTransferService.TransferFile(episodeFilePath, destinationFilename, mode);
-            _diskProvider.TransferFile(episodeFilePath, destinationFilename, mode);
 
             episodeFile.RelativePath = series.Path.GetRelativePath(destinationFilename);
 

src/NzbDrone.Core/MediaFiles/RecycleBinProvider.cs

@@ -22,13 +22,18 @@ namespace NzbDrone.Core.MediaFiles
 
     public class RecycleBinProvider : IHandleAsync<SeriesDeletedEvent>, IExecute<CleanUpRecycleBinCommand>, IRecycleBinProvider
     {
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IDiskProvider _diskProvider;
         private readonly IConfigService _configService;
         private readonly Logger _logger;
 
 
-        public RecycleBinProvider(IDiskProvider diskProvider, IConfigService configService, Logger logger)
+        public RecycleBinProvider(IDiskTransferService diskTransferService,
+                                  IDiskProvider diskProvider,
+                                  IConfigService configService,
+                                  Logger logger)
         {
+            _diskTransferService = diskTransferService;
             _diskProvider = diskProvider;
             _configService = configService;
             _logger = logger;
@@ -51,7 +56,7 @@ namespace NzbDrone.Core.MediaFiles
                 var destination = Path.Combine(recyclingBin, new DirectoryInfo(path).Name);
 
                 _logger.Debug("Moving '{0}' to '{1}'", path, destination);
-                _diskProvider.MoveFolder(path, destination);
+                _diskTransferService.TransferFolder(path, destination, TransferMode.Move);
 
                 _logger.Debug("Setting last accessed: {0}", path);
                 _diskProvider.FolderSetLastWriteTime(destination, DateTime.UtcNow);
@@ -106,7 +111,7 @@ namespace NzbDrone.Core.MediaFiles
                 }
 
                 _logger.Debug("Moving '{0}' to '{1}'", path, destination);
-                _diskProvider.MoveFile(path, destination, true);
+                _diskTransferService.TransferFile(path, destination, TransferMode.Move);
 
                 //TODO: Better fix than this for non-Windows?
                 if (OsInfo.IsWindows)

src/NzbDrone.Core/Metadata/MetadataService.cs

@@ -27,6 +27,7 @@ namespace NzbDrone.Core.Metadata
         private readonly ICleanMetadataService _cleanMetadataService;
         private readonly IMediaFileService _mediaFileService;
         private readonly IEpisodeService _episodeService;
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IDiskProvider _diskProvider;
         private readonly IHttpClient _httpClient;
         private readonly IMediaFileAttributeService _mediaFileAttributeService;
@@ -38,6 +39,7 @@ namespace NzbDrone.Core.Metadata
                                ICleanMetadataService cleanMetadataService,
                                IMediaFileService mediaFileService,
                                IEpisodeService episodeService,
+                               IDiskTransferService diskTransferService,
                                IDiskProvider diskProvider,
                                IHttpClient httpClient,
                                IMediaFileAttributeService mediaFileAttributeService,
@@ -49,6 +51,7 @@ namespace NzbDrone.Core.Metadata
             _cleanMetadataService = cleanMetadataService;
             _mediaFileService = mediaFileService;
             _episodeService = episodeService;
+            _diskTransferService = diskTransferService;
             _diskProvider = diskProvider;
             _httpClient = httpClient;
             _mediaFileAttributeService = mediaFileAttributeService;
@@ -218,7 +221,7 @@ namespace NzbDrone.Core.Metadata
                 var existingFullPath = Path.Combine(series.Path, existingMetadata.RelativePath);
                 if (!fullPath.PathEquals(existingFullPath))
                 {
-                    _diskProvider.MoveFile(existingFullPath, fullPath);
+                    _diskTransferService.TransferFile(existingFullPath, fullPath, TransferMode.Move);
                     existingMetadata.RelativePath = episodeMetadata.RelativePath;
                 }
             }
@@ -339,7 +342,7 @@ namespace NzbDrone.Core.Metadata
                     var existingFullPath = Path.Combine(series.Path, existingMetadata.RelativePath);
                     if (!fullPath.PathEquals(existingFullPath))
                     {
-                        _diskProvider.MoveFile(fullPath, fullPath);
+                        _diskTransferService.TransferFile(existingFullPath, fullPath, TransferMode.Move);
                         existingMetadata.RelativePath = image.RelativePath;
 
                         return new List<MetadataFile>{ existingMetadata };

src/NzbDrone.Core/Tv/MoveSeriesService.cs

@@ -16,19 +16,19 @@ namespace NzbDrone.Core.Tv
     {
         private readonly ISeriesService _seriesService;
         private readonly IBuildFileNames _filenameBuilder;
-        private readonly IDiskProvider _diskProvider;
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IEventAggregator _eventAggregator;
         private readonly Logger _logger;
 
         public MoveSeriesService(ISeriesService seriesService,
                                  IBuildFileNames filenameBuilder,
-                                 IDiskProvider diskProvider,
+                                 IDiskTransferService diskTransferService,
                                  IEventAggregator eventAggregator,
                                  Logger logger)
         {
             _seriesService = seriesService;
             _filenameBuilder = filenameBuilder;
-            _diskProvider = diskProvider;
+            _diskTransferService = diskTransferService;
             _eventAggregator = eventAggregator;
             _logger = logger;
         }
@@ -50,7 +50,7 @@ namespace NzbDrone.Core.Tv
             //TODO: Move to transactional disk operations
             try
             {
-                _diskProvider.MoveFolder(source, destination);
+                _diskTransferService.TransferFolder(source, destination, TransferMode.Move);
             }
             catch (IOException ex)
             {

src/NzbDrone.Core/Update/InstallUpdateService.cs

@@ -24,6 +24,7 @@ namespace NzbDrone.Core.Update
         private readonly IAppFolderInfo _appFolderInfo;
 
         private readonly IDiskProvider _diskProvider;
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IHttpClient _httpClient;
         private readonly IArchiveService _archiveService;
         private readonly IProcessProvider _processProvider;
@@ -34,9 +35,13 @@ namespace NzbDrone.Core.Update
         private readonly IBackupService _backupService;
 
 
-        public InstallUpdateService(ICheckUpdateService checkUpdateService, IAppFolderInfo appFolderInfo,
+        public InstallUpdateService(ICheckUpdateService checkUpdateService,
-                                    IDiskProvider diskProvider, IHttpClient httpClient,
+                                    IAppFolderInfo appFolderInfo,
-                                    IArchiveService archiveService, IProcessProvider processProvider,
+                                    IDiskProvider diskProvider,
+                                    IDiskTransferService diskTransferService,
+                                    IHttpClient httpClient,
+                                    IArchiveService archiveService,
+                                    IProcessProvider processProvider,
                                     IVerifyUpdates updateVerifier,
                                     IStartupContext startupContext,
                                     IConfigFileProvider configFileProvider,
@@ -51,6 +56,7 @@ namespace NzbDrone.Core.Update
             _checkUpdateService = checkUpdateService;
             _appFolderInfo = appFolderInfo;
             _diskProvider = diskProvider;
+            _diskTransferService = diskTransferService;
             _httpClient = httpClient;
             _archiveService = archiveService;
             _processProvider = processProvider;
@@ -113,8 +119,7 @@ namespace NzbDrone.Core.Update
             }
 
             _logger.Info("Preparing client");
-            _diskProvider.MoveFolder(_appFolderInfo.GetUpdateClientFolder(),
+            _diskTransferService.TransferFolder(_appFolderInfo.GetUpdateClientFolder(), updateSandboxFolder, TransferMode.Move, false);
-                                        updateSandboxFolder);
 
             _logger.Info("Starting update client {0}", _appFolderInfo.GetUpdateClientExePath());
             _logger.ProgressInfo("Sonarr will restart shortly.");

src/NzbDrone.Update/UpdateEngine/BackupAndRestore.cs

@@ -13,13 +13,13 @@ namespace NzbDrone.Update.UpdateEngine
 
     public class BackupAndRestore : IBackupAndRestore
     {
-        private readonly IDiskProvider _diskProvider;
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IAppFolderInfo _appFolderInfo;
         private readonly Logger _logger;
 
-        public BackupAndRestore(IDiskProvider diskProvider, IAppFolderInfo appFolderInfo, Logger logger)
+        public BackupAndRestore(IDiskTransferService diskTransferService, IAppFolderInfo appFolderInfo, Logger logger)
         {
-            _diskProvider = diskProvider;
+            _diskTransferService = diskTransferService;
             _appFolderInfo = appFolderInfo;
             _logger = logger;
         }
@@ -27,13 +27,13 @@ namespace NzbDrone.Update.UpdateEngine
         public void Backup(string source)
         {
             _logger.Info("Creating backup of existing installation");
-            _diskProvider.CopyFolder(source, _appFolderInfo.GetUpdateBackUpFolder());
+            _diskTransferService.TransferFolder(source, _appFolderInfo.GetUpdateBackUpFolder(), TransferMode.Copy, false);
         }
 
         public void Restore(string target)
         {
             _logger.Info("Attempting to rollback upgrade");
-            _diskProvider.CopyFolder(_appFolderInfo.GetUpdateBackUpFolder(), target);
+            _diskTransferService.TransferFolder(_appFolderInfo.GetUpdateBackUpFolder(), target, TransferMode.Copy, false);
         }
     }
 }

src/NzbDrone.Update/UpdateEngine/BackupAppData.cs

@@ -14,13 +14,18 @@ namespace NzbDrone.Update.UpdateEngine
     public class BackupAppData : IBackupAppData
     {
         private readonly IAppFolderInfo _appFolderInfo;
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IDiskProvider _diskProvider;
         private readonly Logger _logger;
 
-        public BackupAppData(IAppFolderInfo appFolderInfo, IDiskProvider diskProvider, Logger logger)
+        public BackupAppData(IAppFolderInfo appFolderInfo,
+                             IDiskProvider diskProvider,
+                             IDiskTransferService diskTransferService,
+                             Logger logger)
         {
             _appFolderInfo = appFolderInfo;
             _diskProvider = diskProvider;
+            _diskTransferService = diskTransferService;
             _logger = logger;
         }
 
@@ -33,9 +38,8 @@ namespace NzbDrone.Update.UpdateEngine
 
             try
             {
-                _diskProvider.CopyFile(_appFolderInfo.GetConfigPath(), _appFolderInfo.GetUpdateBackupConfigFile(), true);
+                _diskTransferService.TransferFile(_appFolderInfo.GetConfigPath(), _appFolderInfo.GetUpdateBackupConfigFile(), TransferMode.Copy);
-                _diskProvider.CopyFile(_appFolderInfo.GetNzbDroneDatabase(), _appFolderInfo.GetUpdateBackupDatabase(),
+                _diskTransferService.TransferFile(_appFolderInfo.GetNzbDroneDatabase(), _appFolderInfo.GetUpdateBackupDatabase(), TransferMode.Copy);
-                    true);
             }
             catch (Exception e)
             {

src/NzbDrone.Update/UpdateEngine/InstallUpdateService.cs

@@ -16,6 +16,7 @@ namespace NzbDrone.Update.UpdateEngine
     public class InstallUpdateService : IInstallUpdateService
     {
         private readonly IDiskProvider _diskProvider;
+        private readonly IDiskTransferService _diskTransferService;
         private readonly IDetectApplicationType _detectApplicationType;
         private readonly ITerminateNzbDrone _terminateNzbDrone;
         private readonly IAppFolderInfo _appFolderInfo;
@@ -26,6 +27,7 @@ namespace NzbDrone.Update.UpdateEngine
         private readonly Logger _logger;
 
         public InstallUpdateService(IDiskProvider diskProvider,
+                                    IDiskTransferService diskTransferService,
                                     IDetectApplicationType detectApplicationType,
                                     ITerminateNzbDrone terminateNzbDrone,
                                     IAppFolderInfo appFolderInfo,
@@ -36,6 +38,7 @@ namespace NzbDrone.Update.UpdateEngine
                                     Logger logger)
         {
             _diskProvider = diskProvider;
+            _diskTransferService = diskTransferService;
             _detectApplicationType = detectApplicationType;
             _terminateNzbDrone = terminateNzbDrone;
             _appFolderInfo = appFolderInfo;
@@ -93,7 +96,7 @@ namespace NzbDrone.Update.UpdateEngine
                     _diskProvider.EmptyFolder(installationFolder);
 
                     _logger.Info("Copying new files to target folder");
-                    _diskProvider.CopyFolder(_appFolderInfo.GetUpdatePackageFolder(), installationFolder);
+                    _diskTransferService.TransferFolder(_appFolderInfo.GetUpdatePackageFolder(), installationFolder, TransferMode.Copy, false);
 
                     // Set executable flag on Sonarr app
                     if (OsInfo.IsOsx)