public void CreateWholeDisk()
{
long capacity = 3 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
int idx = table.Create(WellKnownPartitionType.WindowsFat, true);
// Make sure the partition fills all but the first track on the disk.
Assert.AreEqual(geom.TotalSectors, table[idx].SectorCount + geom.SectorsPerTrack);
// Make sure FAT16 was selected for a disk of this size
Assert.AreEqual(BiosPartitionTypes.Fat16, table[idx].BiosType);
// Make sure partition starts where expected
Assert.AreEqual(new ChsAddress(0, 1, 1), ((BiosPartitionInfo)table[idx]).Start);
// Make sure partition ends at end of disk
Assert.AreEqual(geom.ToLogicalBlockAddress(geom.LastSector), table[idx].LastSector);
Assert.AreEqual(geom.LastSector, ((BiosPartitionInfo)table[idx]).End);
// Make sure the 'active' flag made it through...
Assert.IsTrue(((BiosPartitionInfo)table[idx]).IsActive);
// Make sure the partition index is Zero
Assert.AreEqual(0, ((BiosPartitionInfo)table[idx]).PrimaryIndex);
}
public void HonoursReadOnly()
{
SparseMemoryStream diskStream = new SparseMemoryStream();
FatFileSystem fs = FatFileSystem.FormatFloppy(diskStream, FloppyDiskType.HighDensity, "FLOPPY_IMG ");
fs.CreateDirectory(@"AAA");
fs.CreateDirectory(@"BAR");
using (Stream t = fs.OpenFile(@"BAR\AAA.TXT", FileMode.Create, FileAccess.ReadWrite)) { }
using (Stream s = fs.OpenFile(@"BAR\FOO.TXT", FileMode.Create, FileAccess.ReadWrite))
{
StreamWriter w = new StreamWriter(s);
w.WriteLine("FOO - some sample text");
w.Flush();
}
fs.SetLastAccessTimeUtc(@"BAR", new DateTime(1980, 1, 1));
fs.SetLastAccessTimeUtc(@"BAR\FOO.TXT", new DateTime(1980, 1, 1));
// Check we can access a file without any errors
SparseStream roDiskStream = SparseStream.ReadOnly(diskStream, Ownership.None);
FatFileSystem fatFs = new FatFileSystem(roDiskStream);
using (Stream fileStream = fatFs.OpenFile(@"BAR\FOO.TXT", FileMode.Open))
{
fileStream.ReadByte();
}
}
/// <summary>
/// Uses BinarySearch to locate the index of the block that contains start
/// </summary>
/// <param name="cache"></param>
/// <param name="start"></param>
/// <param name="match">True if match found. If this is false, the index returned is where the item would appear if it existed.</param>
/// <returns>Index</returns>
private int FindIndexOfBlockAtOffset(SparseMemoryStream cache, long start, out bool match)
{
if (cache.MemoryBlockCollection.Count == 0)
{
match = false;
return(0);
}
// use BinarySearch to locate blocks of interest quickly
if (_comparisonBlock == null)
{
_comparisonBlock = new MemoryStreamBlock(null, start);
}
else
{
_comparisonBlock.Offset = start;
}
int index = cache.MemoryBlockCollection.BinarySearch(_comparisonBlock);
if (index < 0) // no match
{
// ~index represents the place at which the block we asked for
// would appear if it existed
index = ~index;
match = false;
}
else
{
match = true;
}
return(index);
}
public void ViewIO()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
// Check positions are independant
tss.Position = 100;
Assert.Equal(0, altView.Position);
Assert.Equal(100, tss.Position);
// Check I/O is synchronous
byte[] buffer = new byte[200];
tss.WriteByte(99);
altView.Read(buffer, 0, 200);
Assert.Equal(99, buffer[100]);
// Check positions are updated correctly
Assert.Equal(200, altView.Position);
Assert.Equal(101, tss.Position);
}
/// <summary>
/// Initializes a new instance of the BiosPartitionedDiskBuilder class by
/// cloning the partition structure of a source disk.
/// </summary>
/// <param name="sourceDisk">The disk to clone.</param>
public BiosPartitionedDiskBuilder(VirtualDisk sourceDisk)
{
if (sourceDisk == null)
{
throw new ArgumentNullException(nameof(sourceDisk));
}
_capacity = sourceDisk.Capacity;
_biosGeometry = sourceDisk.BiosGeometry;
_bootSectors = new SparseMemoryStream();
_bootSectors.SetLength(_capacity);
foreach (StreamExtent extent in new BiosPartitionTable(sourceDisk).GetMetadataDiskExtents())
{
sourceDisk.Content.Position = extent.Start;
byte[] buffer = StreamUtilities.ReadExact(sourceDisk.Content, (int)extent.Length);
_bootSectors.Position = extent.Start;
_bootSectors.Write(buffer, 0, buffer.Length);
}
PartitionTable = new BiosPartitionTable(_bootSectors, _biosGeometry);
_partitionContents = new Dictionary <int, BuilderExtent>();
}
public static DiscUtils.Ntfs.NtfsFileSystem NtfsFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
return(DiscUtils.Ntfs.NtfsFileSystem.Format(ms, "", diskGeometry, 0, diskGeometry.TotalSectorsLong));
}
private static DiscFileSystem FatFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
return(DiscUtils.Fat.FatFileSystem.FormatFloppy(ms, FloppyDiskType.Extended, null));
}
protected V8Container NewContainer()
{
var baseStream = SparseMemoryStream.WritableStream();
var container = new V8Container(baseStream, V8ContainerMode.Write);
_disposables.Add(container);
return(container);
}
public void InvalidImageThrowsException()
{
SparseMemoryStream stream = new SparseMemoryStream();
byte[] buffer = new byte[1024 * 1024];
stream.Write(buffer, 0, 1024 * 1024);
stream.Position = 0;
Assert.Throws <InvalidFileSystemException>(() => new FatFileSystem(stream));
}
public void CreateBySizeInGap()
{
SparseMemoryStream ms = new SparseMemoryStream();
Geometry geom = new Geometry(15, 30, 63);
ms.SetLength(geom.Capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
Assert.AreEqual(0, table.CreatePrimaryByCylinder(0, 4, 33, false));
Assert.AreEqual(1, table.CreatePrimaryByCylinder(10, 14, 33, false));
table.Create(geom.ToLogicalBlockAddress(new ChsAddress(4, 0, 1)) * 512, WellKnownPartitionType.WindowsFat, true);
}
public void CanRead()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
Assert.Equal(true, tss.CanRead);
memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.Write);
tss = new ThreadSafeStream(memStream);
Assert.Equal(false, tss.CanRead);
}
public void Format_LargeDisk()
{
long size = 1024L * 1024 * 1024L * 1024; // 1 TB
SparseMemoryStream partStream = new SparseMemoryStream();
NtfsFileSystem.Format(partStream, "New Partition", Geometry.FromCapacity(size), 0, size / 512);
NtfsFileSystem ntfs = new NtfsFileSystem(partStream);
ntfs.Dump(TextWriter.Null, "");
}
/// <summary>
/// Initializes a new instance of the BiosPartitionedDiskBuilder class.
/// </summary>
/// <param name="capacity">The capacity of the disk (in bytes)</param>
/// <param name="biosGeometry">The BIOS geometry of the disk</param>
public BiosPartitionedDiskBuilder(long capacity, Geometry biosGeometry)
{
_capacity = capacity;
_biosGeometry = biosGeometry;
_bootSectors = new SparseMemoryStream();
_bootSectors.SetLength(capacity);
_partitionTable = BiosPartitionTable.Initialize(_bootSectors, _biosGeometry);
_partitionContents = new Dictionary<int, BuilderExtent>();
}
/// <summary>
/// Initializes a new instance of the BiosPartitionedDiskBuilder class.
/// </summary>
/// <param name="capacity">The capacity of the disk (in bytes)</param>
/// <param name="biosGeometry">The BIOS geometry of the disk</param>
public BiosPartitionedDiskBuilder(long capacity, Geometry biosGeometry)
{
_capacity = capacity;
_biosGeometry = biosGeometry;
_bootSectors = new SparseMemoryStream();
_bootSectors.SetLength(capacity);
_partitionTable = BiosPartitionTable.Initialize(_bootSectors, _biosGeometry);
_partitionContents = new Dictionary <int, BuilderExtent>();
}
public void Initialize()
{
long capacity = 3 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
Assert.AreEqual(0, table.Count);
}
public void CreateBySizeInGap()
{
SparseMemoryStream ms = new SparseMemoryStream();
Geometry geom = new Geometry(15, 30, 63);
ms.SetLength(geom.Capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
Assert.AreEqual(0, table.CreatePrimaryByCylinder(0, 4, 33, false));
Assert.AreEqual(1, table.CreatePrimaryByCylinder(10, 14, 33, false));
table.Create(geom.ToLogicalBlockAddress(new ChsAddress(4, 0, 1)) * 512, WellKnownPartitionType.WindowsFat, true);
}
public BiosPartitionedDiskBuilder(long capacity, byte[] bootSectors, Geometry biosGeometry)
{
_capacity = capacity;
_biosGeometry = biosGeometry;
_bootSectors = new SparseMemoryStream();
_bootSectors.SetLength(capacity);
_bootSectors.Write(bootSectors, 0, bootSectors.Length);
_partitionTable = new BiosPartitionTable(_bootSectors, biosGeometry);
_partitionContents = new Dictionary <int, BuilderExtent>();
}
public void Format_SmallDisk()
{
long size = 8 * 1024 * 1024;
SparseMemoryStream partStream = new SparseMemoryStream();
//VirtualDisk disk = Vhd.Disk.InitializeDynamic(partStream, Ownership.Dispose, size);
NtfsFileSystem.Format(partStream, "New Partition", Geometry.FromCapacity(size), 0, size / 512);
NtfsFileSystem ntfs = new NtfsFileSystem(partStream);
ntfs.Dump(TextWriter.Null, "");
}
public BiosPartitionedDiskBuilder(long capacity, byte[] bootSectors, Geometry biosGeometry)
{
_capacity = capacity;
_biosGeometry = biosGeometry;
_bootSectors = new SparseMemoryStream();
_bootSectors.SetLength(capacity);
_bootSectors.Write(bootSectors, 0, bootSectors.Length);
_partitionTable = new BiosPartitionTable(_bootSectors, biosGeometry);
_partitionContents = new Dictionary<int, BuilderExtent>();
}
IDataTransform.GetTransformedStream(
Stream encodedStream,
IDictionary transformContext
)
{
Stream tempStream = new SparseMemoryStream(_lowWaterMark, _highWaterMark);
tempStream = new CompressEmulationStream(encodedStream, tempStream, 0, new CompoundFileDeflateTransform());
// return a VersionedStream that works with the VersionedStreamOwner
// to verify/update our FormatVersion info
return(new VersionedStream(tempStream, _versionedStreamOwner));
}
public static DiscFileSystem DiagnosticNtfsFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
DiscUtils.Ntfs.NtfsFileSystem.Format(ms, "", diskGeometry, 0, diskGeometry.TotalSectorsLong);
var discFs = new DiscUtils.Diagnostics.ValidatingFileSystem <NtfsFileSystem, NtfsFileSystemChecker>(ms);
discFs.CheckpointInterval = 1;
discFs.GlobalIOTraceCapturesStackTraces = false;
return(discFs);
}
public void VeryLargePartition()
{
long capacity = 1300 * 1024L * 1024L * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.LbaAssistedBiosGeometry(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
// exception occurs here
int i = table.CreatePrimaryByCylinder(0, 150000, (byte)WellKnownPartitionType.WindowsNtfs, true);
Assert.AreEqual(150000, geom.ToChsAddress(table[0].LastSector).Cylinder);
}
public override void SetLength(long newLength)
{
CheckDisposed();
Debug.Assert(_cachePrefixStream == null); // we only expect this thing to be not null during Archive Save execution
// that would between PreSaveNotofication call and Save SaveStreaming
if (newLength < 0)
{
throw new ArgumentOutOfRangeException("newLength");
}
if (_currentStreamLength != newLength)
{
_dirtyFlag = true;
_dataChanged = true;
if (newLength <= _persistedSize)
{
// the stream becomes smaller than our disk block, which means that
// we can drop the in-memory-sparse-suffix
if (_sparseMemoryStreamSuffix != null)
{
_sparseMemoryStreamSuffix.Close();
_sparseMemoryStreamSuffix = null;
}
}
else
{
// we need to construct Sparse Memory stream if we do not have one yet
if (_sparseMemoryStreamSuffix == null)
{
_sparseMemoryStreamSuffix = new SparseMemoryStream(_lowWaterMark, _highWaterMark);
}
// set size on the Sparse Memory Stream
_sparseMemoryStreamSuffix.SetLength(newLength - _persistedSize); // no need for checked as it was verified above
}
_currentStreamLength = newLength;
// if stream was truncated to the point that our current position is beyond the end of the stream,
// we need to reset position so it is at the end of the stream
if (_currentStreamLength < _currentStreamPosition)
{
Seek(_currentStreamLength, SeekOrigin.Begin);
}
}
}
public void CreateByCylinder()
{
SparseMemoryStream ms = new SparseMemoryStream();
Geometry geom = new Geometry(15, 30, 63);
ms.SetLength(geom.Capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
Assert.AreEqual(0, table.CreatePrimaryByCylinder(0, 4, 33, false));
Assert.AreEqual(1, table.CreatePrimaryByCylinder(10, 14, 33, false));
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(0, 1, 1)), table[0].FirstSector);
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(5, 0, 1)) - 1, table[0].LastSector);
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(10, 0, 1)), table[1].FirstSector);
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(14, 29, 63)), table[1].LastSector);
}
private int ReadFromCache(SparseMemoryStream cache, long start, int count, byte[] buffer, int bufferOffset)
{
#if DEBUG
// debug only check for valid parameters, as we generally expect callers to verify them
PackagingUtilities.VerifyStreamReadArgs(this, buffer, bufferOffset, count);
#endif
Debug.Assert(cache != null);
Debug.Assert(start >= 0);
IList <MemoryStreamBlock> collection = cache.MemoryBlockCollection;
checked
{
// use BinarySearch to locate blocks of interest quickly
bool match; // exact match?
int index = FindIndexOfBlockAtOffset(cache, start, out match);
// if match was found, read from it
int bytesRead = 0;
if (match)
{
MemoryStreamBlock memStreamBlock = collection[index];
long overlapBlockOffset;
long overlapBlockSize;
// we have got an overlap which can be used to satisfy the read request,
// at least partially
PackagingUtilities.CalculateOverlap(memStreamBlock.Offset, memStreamBlock.Stream.Length,
start, count,
out overlapBlockOffset, out overlapBlockSize);
if (overlapBlockSize > 0)
{
// overlap must be starting at the start as we know for sure that
// memStreamBlock.Offset <= start
Debug.Assert(overlapBlockOffset == start);
memStreamBlock.Stream.Seek(overlapBlockOffset - memStreamBlock.Offset, SeekOrigin.Begin);
// we know that memStream will return as much data as we requested
// even if this logic changes we do not have to return everything
// a partially complete read is acceptable here
bytesRead = memStreamBlock.Stream.Read(buffer, bufferOffset, (int)overlapBlockSize);
}
}
return(bytesRead);
}
}
public DiskBuilderTest()
{
SparseMemoryStream sourceStream = new SparseMemoryStream();
sourceStream.SetLength(160 * 1024L * 1024);
for (int i = 0; i < 8; ++i)
{
sourceStream.Position = i * 1024L * 1024;
sourceStream.WriteByte((byte)i);
}
sourceStream.Position = 150 * 1024 * 1024;
sourceStream.WriteByte(0xFF);
diskContent = sourceStream;
}
public void CreateByCylinder()
{
SparseMemoryStream ms = new SparseMemoryStream();
Geometry geom = new Geometry(15, 30, 63);
ms.SetLength(geom.Capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
Assert.AreEqual(0, table.CreatePrimaryByCylinder(0, 4, 33, false));
Assert.AreEqual(1, table.CreatePrimaryByCylinder(10, 14, 33, false));
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(0, 1, 1)), table[0].FirstSector);
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(5, 0, 1)) - 1, table[0].LastSector);
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(10, 0, 1)), table[1].FirstSector);
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(14, 29, 63)), table[1].LastSector);
}
public void ExtentInfo()
{
using (SparseMemoryStream ms = new SparseMemoryStream())
{
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
NtfsFileSystem ntfs = NtfsFileSystem.Format(ms, "", diskGeometry, 0, diskGeometry.TotalSectorsLong);
// Check non-resident attribute
using (Stream s = ntfs.OpenFile(@"file", FileMode.Create, FileAccess.ReadWrite))
{
byte[] data = new byte[(int)ntfs.ClusterSize];
data[0] = 0xAE;
data[1] = 0x3F;
data[2] = 0x8D;
s.Write(data, 0, (int)ntfs.ClusterSize);
}
var extents = ntfs.PathToExtents("file");
Assert.Equal(1, extents.Length);
Assert.Equal(ntfs.ClusterSize, extents[0].Length);
ms.Position = extents[0].Start;
Assert.Equal(0xAE, ms.ReadByte());
Assert.Equal(0x3F, ms.ReadByte());
Assert.Equal(0x8D, ms.ReadByte());
// Check resident attribute
using (Stream s = ntfs.OpenFile(@"file2", FileMode.Create, FileAccess.ReadWrite))
{
s.WriteByte(0xBA);
s.WriteByte(0x82);
s.WriteByte(0x2C);
}
extents = ntfs.PathToExtents("file2");
Assert.Equal(1, extents.Length);
Assert.Equal(3, extents[0].Length);
byte[] read = new byte[100];
ms.Position = extents[0].Start;
ms.Read(read, 0, 100);
Assert.Equal(0xBA, read[0]);
Assert.Equal(0x82, read[1]);
Assert.Equal(0x2C, read[2]);
}
}
public BiosPartitionedDiskBuilder(long capacity, byte[] bootSectors, Geometry biosGeometry)
{
if (bootSectors == null)
{
throw new ArgumentNullException(nameof(bootSectors));
}
_capacity = capacity;
_biosGeometry = biosGeometry;
_bootSectors = new SparseMemoryStream();
_bootSectors.SetLength(capacity);
_bootSectors.Write(bootSectors, 0, bootSectors.Length);
PartitionTable = new BiosPartitionTable(_bootSectors, biosGeometry);
_partitionContents = new Dictionary <int, BuilderExtent>();
}
public void V8Container_Constructor_ThrowsIfOnIncorrectStream(
V8ContainerMode mode, bool canSeek, bool canRead, bool canWrite, string expectedMessage)
{
using (var baseStream = new SparseMemoryStream(canRead, canWrite, canSeek))
{
Action ctor = () =>
{
using (new V8Container(baseStream, mode))
{
}
};
ctor.Should()
.Throw <ArgumentException>()
.WithMessage(expectedMessage);
}
}
public void Seek()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
tss.Seek(10, SeekOrigin.Begin);
Assert.Equal(10, tss.Position);
tss.Seek(10, SeekOrigin.Current);
Assert.Equal(20, tss.Position);
tss.Seek(-10, SeekOrigin.End);
Assert.Equal(1014, tss.Position);
}
public void CreateBySize()
{
long capacity = 3 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
int idx = table.Create(2 * 1024 * 1024, WellKnownPartitionType.WindowsFat, false);
// Make sure the partition is within 10% of the size requested.
Assert.That((2 * 1024 * 2) * 0.9 < table[idx].SectorCount);
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(0, 1, 1)), table[idx].FirstSector);
Assert.AreEqual(geom.HeadsPerCylinder - 1, geom.ToChsAddress((int)table[idx].LastSector).Head);
Assert.AreEqual(geom.SectorsPerTrack, geom.ToChsAddress((int)table[idx].LastSector).Sector);
}
public void DisposeView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
altView.Dispose();
tss.ReadByte();
SparseStream altView2 = tss.OpenView();
altView2.ReadByte();
}
public void FieldUpdating(PXCache sender, PXFieldUpdatingEventArgs e)
{
if (e.NewValue != null)
{
if (e.NewValue is byte[][])
{
return;
}
var fileStream = new SparseMemoryStream();
var gZipStream = new GZipStream(fileStream, CompressionMode.Compress);
PXReflectionSerializer.Serialize(gZipStream, e.NewValue, false);
gZipStream.Close();
fileStream.Close();
e.NewValue = fileStream.GetBuf();
}
}
public void CreateBySize()
{
long capacity = 3 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
int idx = table.Create(2 * 1024 * 1024, WellKnownPartitionType.WindowsFat, false);
// Make sure the partition is within 10% of the size requested.
Assert.That((2 * 1024 * 2) * 0.9 < table[idx].SectorCount);
Assert.AreEqual(geom.ToLogicalBlockAddress(new ChsAddress(0, 1, 1)), table[idx].FirstSector);
Assert.AreEqual(geom.HeadsPerCylinder - 1, geom.ToChsAddress((int)table[idx].LastSector).Head);
Assert.AreEqual(geom.SectorsPerTrack, geom.ToChsAddress((int)table[idx].LastSector).Sector);
}
/// <summary>
/// Find offset of next available block after this offset
/// </summary>
/// <param name="cache">cache to inspect</param>
/// <param name="start">offset to start search from</param>
/// <returns>offset of block start if found, otherwise -1</returns>
/// <remarks>Contract: Call only when start is not inside any existing block.</remarks>
private long FindOffsetOfNextAvailableBlockAfter(SparseMemoryStream cache, long start)
{
Debug.Assert(start >= 0);
Debug.Assert(cache != null);
// Find the index where a new block with offset start would be placed
bool match;
int index = FindIndexOfBlockAtOffset(cache, start, out match);
Debug.Assert(!match, "Must only be called when there is no match");
// If we have an exact match, we return the offset of the next block, unless
// there are no more blocks - then we return -1
if (index >= (cache.MemoryBlockCollection.Count))
return -1; // no block beyond start
else
{
return cache.MemoryBlockCollection[index].Offset;
}
}
/// <summary>
/// Uses BinarySearch to locate the index of the block that contains start
/// </summary>
/// <param name="cache"></param>
/// <param name="start"></param>
/// <param name="match">True if match found. If this is false, the index returned is where the item would appear if it existed.</param>
/// <returns>Index</returns>
private int FindIndexOfBlockAtOffset(SparseMemoryStream cache, long start, out bool match)
{
if (cache.MemoryBlockCollection.Count == 0)
{
match = false;
return 0;
}
// use BinarySearch to locate blocks of interest quickly
if (_comparisonBlock == null)
_comparisonBlock = new MemoryStreamBlock(null, start);
else
_comparisonBlock.Offset = start;
int index = cache.MemoryBlockCollection.BinarySearch(_comparisonBlock);
if (index < 0) // no match
{
// ~index represents the place at which the block we asked for
// would appear if it existed
index = ~index;
match = false;
}
else
{
match = true;
}
return index;
}
private int ReadFromCache(SparseMemoryStream cache, long start, int count, byte[] buffer, int bufferOffset)
{
#if DEBUG
// debug only check for valid parameters, as we generally expect callers to verify them
PackagingUtilities.VerifyStreamReadArgs(this, buffer, bufferOffset, count);
#endif
Debug.Assert(cache != null);
Debug.Assert(start >=0);
IList<MemoryStreamBlock> collection = cache.MemoryBlockCollection;
checked
{
// use BinarySearch to locate blocks of interest quickly
bool match; // exact match?
int index = FindIndexOfBlockAtOffset(cache, start, out match);
// if match was found, read from it
int bytesRead = 0;
if (match)
{
MemoryStreamBlock memStreamBlock = collection[index];
long overlapBlockOffset;
long overlapBlockSize;
// we have got an overlap which can be used to satisfy the read request,
// at least partially
PackagingUtilities.CalculateOverlap(memStreamBlock.Offset, memStreamBlock.Stream.Length,
start, count,
out overlapBlockOffset, out overlapBlockSize);
if (overlapBlockSize > 0)
{
// overlap must be starting at the start as we know for sure that
// memStreamBlock.Offset <= start
Debug.Assert(overlapBlockOffset == start);
memStreamBlock.Stream.Seek(overlapBlockOffset - memStreamBlock.Offset, SeekOrigin.Begin);
// we know that memStream will return as much data as we requested
// even if this logic changes we do not have to return everything
// a partially complete read is acceptable here
bytesRead = memStreamBlock.Stream.Read(buffer, bufferOffset, (int)overlapBlockSize);
}
}
return bytesRead;
}
}
public void Initialize()
{
long capacity = 3 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
Assert.AreEqual(0, table.Count);
}
public void CreateWholeDiskAligned()
{
long capacity = 3 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
int idx = table.CreateAligned(WellKnownPartitionType.WindowsFat, true, 64 * 1024);
Assert.AreEqual(0, table[idx].FirstSector % 128);
Assert.AreEqual(0, (table[idx].LastSector + 1) % 128);
Assert.Greater(table[idx].SectorCount * 512, capacity * 0.9);
// Make sure the partition index is Zero
Assert.AreEqual(0, ((BiosPartitionInfo)table[idx]).PrimaryIndex);
}
public override void SetLength(long newLength)
{
CheckDisposed();
Debug.Assert(_cachePrefixStream == null); // we only expect this thing to be not null during Archive Save execution
// that would between PreSaveNotofication call and Save SaveStreaming
if (newLength < 0)
{
throw new ArgumentOutOfRangeException("newLength");
}
if (_currentStreamLength != newLength)
{
_dirtyFlag = true;
_dataChanged = true;
if (newLength <= _persistedSize)
{
// the stream becomes smaller than our disk block, which means that
// we can drop the in-memory-sparse-suffix
if (_sparseMemoryStreamSuffix != null)
{
_sparseMemoryStreamSuffix.Close();
_sparseMemoryStreamSuffix = null;
}
}
else
{
// we need to construct Sparse Memory stream if we do not have one yet
if (_sparseMemoryStreamSuffix == null)
{
_sparseMemoryStreamSuffix = new SparseMemoryStream(_lowWaterMark, _highWaterMark);
}
// set size on the Sparse Memory Stream
_sparseMemoryStreamSuffix.SetLength(newLength - _persistedSize); // no need for checked as it was verified above
}
_currentStreamLength = newLength;
// if stream was truncated to the point that our current position is beyond the end of the stream,
// we need to reset position so it is at the end of the stream
if (_currentStreamLength < _currentStreamPosition)
Seek(_currentStreamLength, SeekOrigin.Begin);
}
}
public void Format_LargeDisk()
{
long size = 1024L * 1024 * 1024L * 1024; // 1 TB
SparseMemoryStream partStream = new SparseMemoryStream();
NtfsFileSystem.Format(partStream, "New Partition", Geometry.FromCapacity(size), 0, size / 512);
NtfsFileSystem ntfs = new NtfsFileSystem(partStream);
ntfs.Dump(TextWriter.Null, "");
}
IDataTransform.GetTransformedStream(
Stream encodedStream,
IDictionary transformContext
)
{
Stream tempStream = new SparseMemoryStream(_lowWaterMark, _highWaterMark);
tempStream = new CompressEmulationStream(encodedStream, tempStream, 0, new CompoundFileDeflateTransform());
// return a VersionedStream that works with the VersionedStreamOwner
// to verify/update our FormatVersion info
return new VersionedStream(tempStream, _versionedStreamOwner);
}
public void CreateBySizeInGapAligned()
{
SparseMemoryStream ms = new SparseMemoryStream();
Geometry geom = new Geometry(15, 30, 63);
ms.SetLength(geom.Capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
Assert.AreEqual(0, table.CreatePrimaryByCylinder(0, 4, 33, false));
Assert.AreEqual(1, table.CreatePrimaryByCylinder(10, 14, 33, false));
int idx = table.CreateAligned(3 * 1024 * 1024, WellKnownPartitionType.WindowsFat, true, 64 * 1024);
Assert.AreEqual(2, idx);
Assert.AreEqual(0, table[idx].FirstSector % 128);
Assert.AreEqual(0, (table[idx].LastSector + 1) % 128);
}
/// <summary>
/// Write
/// </summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
/// <remarks>In streaming mode, write should accumulate data into the SparseMemoryStream.</remarks>
override public void Write(byte[] buffer, int offset, int count)
{
CheckDisposed();
PackagingUtilities.VerifyStreamWriteArgs(this, buffer, offset, count);
Debug.Assert(_cachePrefixStream == null); // we only expect this thing to be not null during Archive Save execution
// that would between PreSaveNotofication call and Save SaveStreaming
Debug.Assert(_currentStreamPosition >= 0);
if (count == 0)
{
return;
}
int diskBytesToWrite = 0;
_dirtyFlag = true;
_dataChanged = true;
long newStreamPosition = _currentStreamPosition;
checked
{
// Try to satisfy request with the Write to the Disk
if (newStreamPosition < _persistedSize)
{
Debug.Assert(!_blockManager.Streaming);
// we have at least partial overlap between request and the data on disk
_blockManager.Stream.Seek(_persistedOffset + newStreamPosition, SeekOrigin.Begin);
// Note on casting:
// It is safe to cast the result of Math.Min(count, _persistedSize - newStreamPosition))
// from long to int since it cannot be bigger than count and count is int type
diskBytesToWrite = (int) (Math.Min(count, _persistedSize - newStreamPosition)); // this is a safe cast as count has int type
_blockManager.Stream.Write(buffer, offset, diskBytesToWrite);
newStreamPosition += diskBytesToWrite;
count -= diskBytesToWrite;
offset += diskBytesToWrite;
}
// check whether we need to save data to the memory Stream;
if (newStreamPosition + count > _persistedSize)
{
if (_sparseMemoryStreamSuffix == null)
{
_sparseMemoryStreamSuffix = new SparseMemoryStream(_lowWaterMark, _highWaterMark);
}
_sparseMemoryStreamSuffix.Seek(newStreamPosition - _persistedSize, SeekOrigin.Begin);
_sparseMemoryStreamSuffix.Write(buffer, offset, count);
newStreamPosition += count;
}
_currentStreamPosition = newStreamPosition;
_currentStreamLength = Math.Max(_currentStreamLength, _currentStreamPosition);
}
return;
}
public void LargeDisk()
{
long capacity = 300 * 1024L * 1024L * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.LbaAssistedBiosGeometry(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
table.Create(150 * 1024L * 1024L * 1024, WellKnownPartitionType.WindowsNtfs, false);
table.Create(20 * 1024L * 1024L * 1024, WellKnownPartitionType.WindowsNtfs, false);
table.Create(20 * 1024L * 1024L * 1024, WellKnownPartitionType.WindowsNtfs, false);
Assert.AreEqual(3, table.Partitions.Count);
Assert.Greater(table[0].SectorCount * 512L, 140 * 1024L * 1024L * 1024);
Assert.Greater(table[1].SectorCount * 512L, 19 * 1024L * 1024L * 1024);
Assert.Greater(table[2].SectorCount * 512L, 19 * 1024L * 1024L * 1024);
Assert.Greater(table[0].FirstSector, 0);
Assert.Greater(table[1].FirstSector, table[0].LastSector);
Assert.Greater(table[2].FirstSector, table[1].LastSector);
}
public void HonoursReadOnly()
{
SparseMemoryStream diskStream = new SparseMemoryStream();
FatFileSystem fs = FatFileSystem.FormatFloppy(diskStream, FloppyDiskType.HighDensity, "FLOPPY_IMG ");
fs.CreateDirectory(@"AAA");
fs.CreateDirectory(@"BAR");
using (Stream t = fs.OpenFile(@"BAR\AAA.TXT", FileMode.Create, FileAccess.ReadWrite)) { }
using (Stream s = fs.OpenFile(@"BAR\FOO.TXT", FileMode.Create, FileAccess.ReadWrite))
{
StreamWriter w = new StreamWriter(s);
w.WriteLine("FOO - some sample text");
w.Flush();
}
fs.SetLastAccessTimeUtc(@"BAR", new DateTime(1980, 1, 1));
fs.SetLastAccessTimeUtc(@"BAR\FOO.TXT", new DateTime(1980, 1, 1));
// Check we can access a file without any errors
SparseStream roDiskStream = SparseStream.ReadOnly(diskStream, Ownership.None);
FatFileSystem fatFs = new FatFileSystem(roDiskStream);
using (Stream fileStream = fatFs.OpenFile(@"BAR\FOO.TXT", FileMode.Open))
{
fileStream.ReadByte();
}
}
public void ExtentInfo()
{
using (SparseMemoryStream ms = new SparseMemoryStream())
{
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
NtfsFileSystem ntfs = NtfsFileSystem.Format(ms, "", diskGeometry, 0, diskGeometry.TotalSectors);
// Check non-resident attribute
using (Stream s = ntfs.OpenFile(@"file", FileMode.Create, FileAccess.ReadWrite))
{
byte[] data = new byte[(int)ntfs.ClusterSize];
data[0] = 0xAE;
data[1] = 0x3F;
data[2] = 0x8D;
s.Write(data, 0, (int)ntfs.ClusterSize);
}
var extents = ntfs.PathToExtents("file");
Assert.AreEqual(1, extents.Length);
Assert.AreEqual(ntfs.ClusterSize, extents[0].Length);
ms.Position = extents[0].Start;
Assert.AreEqual(0xAE, ms.ReadByte());
Assert.AreEqual(0x3F, ms.ReadByte());
Assert.AreEqual(0x8D, ms.ReadByte());
// Check resident attribute
using (Stream s = ntfs.OpenFile(@"file2", FileMode.Create, FileAccess.ReadWrite))
{
s.WriteByte(0xBA);
s.WriteByte(0x82);
s.WriteByte(0x2C);
}
extents = ntfs.PathToExtents("file2");
Assert.AreEqual(1, extents.Length);
Assert.AreEqual(3, extents[0].Length);
byte[] read = new byte[100];
ms.Position = extents[0].Start;
ms.Read(read, 0, 100);
Assert.AreEqual(0xBA, read[0]);
Assert.AreEqual(0x82, read[1]);
Assert.AreEqual(0x2C, read[2]);
}
}
public void VeryLargePartition()
{
long capacity = 1300 * 1024L * 1024L * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.LbaAssistedBiosGeometry(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
// exception occurs here
int i = table.CreatePrimaryByCylinder(0, 150000, (byte)WellKnownPartitionType.WindowsNtfs, true);
Assert.AreEqual(150000, geom.ToChsAddress(table[0].LastSector).Cylinder);
}
public void Format_SmallDisk()
{
long size = 8 * 1024 * 1024;
SparseMemoryStream partStream = new SparseMemoryStream();
//VirtualDisk disk = Vhd.Disk.InitializeDynamic(partStream, Ownership.Dispose, size);
NtfsFileSystem.Format(partStream, "New Partition", Geometry.FromCapacity(size), 0, size / 512);
NtfsFileSystem ntfs = new NtfsFileSystem(partStream);
ntfs.Dump(TextWriter.Null, "");
}
/// <summary>
/// This is the common Pre Save notiofication handler for
/// RawDataFile Block and File Item Stream
/// It makes assumption that the overlap generally start coming in at the beginning of a
/// large disk image, so we should only try to cache cache overlaped data in the prefix
/// of the disk block
/// Block can also return a value indicating whether PreSaveNotification should be extended to the blocks that are positioned after
/// it in the Block List. For example, if block has completely handled PreSaveNotification in a way that it cached the whole area that
/// was in danger (of being overwritten) it means that no blocks need to worry about this anymore. After all no 2 blocks should have
/// share on disk buffers. Another scenario is when block can determine that area in danger is positioned before the block's on disk
/// buffers; this means that all blocks that are positioned later in the block list do not need to worry about this PreSaveNotification
/// as their buffers should be positioned even further alone in the file.
/// </summary>
internal static PreSaveNotificationScanControlInstruction CommonPreSaveNotificationHandler(
Stream stream,
long offset, long size,
long onDiskOffset, long onDiskSize,
ref SparseMemoryStream cachePrefixStream)
{
checked
{
Debug.Assert(size >=0);
Debug.Assert(offset >=0);
Debug.Assert(onDiskSize >=0);
Debug.Assert(onDiskOffset >=0);
// trivial request
if (size == 0)
{
// The area being overwritten is of size 0 so there is no need to notify any blocks about this.
return PreSaveNotificationScanControlInstruction.Stop;
}
if (cachePrefixStream != null)
{
// if we have something in cache prefix buffer we only should check whatever tail data isn't cached
checked{onDiskOffset += cachePrefixStream.Length;}
checked{onDiskSize -= cachePrefixStream.Length;}
Debug.Assert(onDiskSize >=0);
}
if (onDiskSize == 0)
{
// the raw data block happened to be fully cached
// in this case (onDiskSize==0) can not be used as a reliable indicator of the position of the
// on disk buffer relative to the other; it is just an indicator of an empty buffer which might have a meaningless offset
// that shouldn't be driving any decisions
return PreSaveNotificationScanControlInstruction.Continue;
}
// we need to first find out if the raw data that isn't cached yet overlaps with any disk space
// that is about to be overriden
long overlapBlockOffset;
long overlapBlockSize;
PackagingUtilities.CalculateOverlap(onDiskOffset, onDiskSize,
offset, size ,
out overlapBlockOffset, out overlapBlockSize);
if (overlapBlockSize <= 0)
{
// No overlap , we can ignore this message.
// In addition to that, if (onDiskOffset > offset) it means that, given the fact that all blocks after
// the current one will have even larger offsets, they couldn't possibly overlap with (offset ,size ) chunk .
return (onDiskOffset > offset) ?
PreSaveNotificationScanControlInstruction.Stop :
PreSaveNotificationScanControlInstruction.Continue;
}
// at this point we have an overlap, we need to read the data that is overlapped
// and merge it with whatever we already have in cache
// let's figure out the part that isn't cached yet, and needs to be
long blockSizeToCache;
checked
{
blockSizeToCache = overlapBlockOffset + overlapBlockSize - onDiskOffset;
}
Debug.Assert(blockSizeToCache >0); // there must be a non empty block at this point that needs to be cached
// We need to ensure that we do have a place to store this data
if (cachePrefixStream == null)
{
cachePrefixStream = new SparseMemoryStream(_lowWaterMark, _highWaterMark);
}
else
{
// if we already have some cached prefix data we have to make sure we are
// appending new data tro the tail of the already cached chunk
cachePrefixStream.Seek(0, SeekOrigin.End);
}
stream.Seek(onDiskOffset, SeekOrigin.Begin);
long bytesCopied = PackagingUtilities.CopyStream(stream, cachePrefixStream, blockSizeToCache, 4096);
if (bytesCopied != blockSizeToCache)
{
throw new FileFormatException(SR.Get(SRID.CorruptedData));
}
// if the contdition below is true it means that, given the fact that all blocks after
// the current one will have even larger offsets, they couldn't possibly overlap with (offset ,size ) chunk
return ((onDiskOffset + onDiskSize) >= (offset + size)) ?
PreSaveNotificationScanControlInstruction.Stop :
PreSaveNotificationScanControlInstruction.Continue;
}
}
public void Setup()
{
SparseMemoryStream sourceStream = new SparseMemoryStream();
sourceStream.SetLength(160 * 1024L * 1024);
for (int i = 0; i < 8; ++i)
{
sourceStream.Position = i * 1024L * 1024;
sourceStream.WriteByte((byte)i);
}
sourceStream.Position = 150 * 1024 * 1024;
sourceStream.WriteByte(0xFF);
diskContent = sourceStream;
}
public void CreateWholeDisk()
{
long capacity = 3 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
int idx = table.Create(WellKnownPartitionType.WindowsFat, true);
// Make sure the partition fills all but the first track on the disk.
Assert.AreEqual(geom.TotalSectors, table[idx].SectorCount + geom.SectorsPerTrack);
// Make sure FAT16 was selected for a disk of this size
Assert.AreEqual(BiosPartitionTypes.Fat16, table[idx].BiosType);
// Make sure partition starts where expected
Assert.AreEqual(new ChsAddress(0, 1, 1), ((BiosPartitionInfo)table[idx]).Start);
// Make sure partition ends at end of disk
Assert.AreEqual(geom.ToLogicalBlockAddress(geom.LastSector), table[idx].LastSector);
Assert.AreEqual(geom.LastSector, ((BiosPartitionInfo)table[idx]).End);
// Make sure the 'active' flag made it through...
Assert.IsTrue(((BiosPartitionInfo)table[idx]).IsActive);
// Make sure the partition index is Zero
Assert.AreEqual(0, ((BiosPartitionInfo)table[idx]).PrimaryIndex);
}
/// <summary>
/// Initializes a new instance of the BiosPartitionedDiskBuilder class by
/// cloning the partition structure of a source disk.
/// </summary>
/// <param name="sourceDisk">The disk to clone</param>
public BiosPartitionedDiskBuilder(VirtualDisk sourceDisk)
{
_capacity = sourceDisk.Capacity;
_biosGeometry = sourceDisk.BiosGeometry;
_bootSectors = new SparseMemoryStream();
_bootSectors.SetLength(_capacity);
foreach (var extent in new BiosPartitionTable(sourceDisk).GetMetadataDiskExtents())
{
sourceDisk.Content.Position = extent.Start;
byte[] buffer = Utilities.ReadFully(sourceDisk.Content, (int)extent.Length);
_bootSectors.Position = extent.Start;
_bootSectors.Write(buffer, 0, buffer.Length);
}
_partitionTable = new BiosPartitionTable(_bootSectors, _biosGeometry);
_partitionContents = new Dictionary<int, BuilderExtent>();
}
/// <summary>
/// ChangeMode
/// </summary>
/// <param name="newMode"></param>
/// <remarks>Does not update Position of _current for change to ReadPassThroughMode.</remarks>
private void ChangeMode(Mode newMode)
{
// ignore redundant calls (allowing these actually simplifies the logic in SetLength)
if (newMode == _mode)
return;
// every state change requires this logic
if (_current != null)
{
_current.Close();
_dirtyForClosing = false;
_dirtyForFlushing = false;
}
// set the new mode - must be done before the call to Seek
_mode = newMode;
switch (newMode)
{
case Mode.Start:
{
_current = null;
_baseStream.Position = 0;
break;
}
case Mode.ReadPassThrough:
case Mode.WritePassThrough:
{
Debug.Assert(_baseStream.Position == 0);
// create the appropriate DeflateStream
_current = new DeflateStream(_baseStream,
newMode == Mode.WritePassThrough ? CompressionMode.Compress : CompressionMode.Decompress,
true);
break;
}
case Mode.Emulation:
{
// Create emulation stream. Use a MemoryStream for local caching.
// Do not change this logic for RM cases because the data is "in the clear" and must
// not be persisted in a vulnerable location.
SparseMemoryStream memStream = new SparseMemoryStream(_lowWaterMark, _highWaterMark);
_current = new CompressEmulationStream(_baseStream, memStream, _position, new DeflateEmulationTransform());
// verify and set length
UpdateUncompressedDataLength(_current.Length);
break;
}
case Mode.Disposed: break;
default:
Debug.Assert(false, "Illegal state for CompressStream - logic error"); break;
}
}
public void SetActive()
{
long capacity = 10 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
table.Create(1 * 1024 * 1024, WellKnownPartitionType.WindowsFat, false);
table.Create(2 * 1024 * 1024, WellKnownPartitionType.WindowsFat, false);
table.Create(3 * 1024 * 1024, WellKnownPartitionType.WindowsFat, false);
table.SetActivePartition(1);
table.SetActivePartition(2);
Assert.IsFalse(((BiosPartitionInfo)table.Partitions[1]).IsActive);
Assert.IsTrue(((BiosPartitionInfo)table.Partitions[2]).IsActive);
}
public void Delete()
{
long capacity = 10 * 1024 * 1024;
SparseMemoryStream ms = new SparseMemoryStream();
ms.SetLength(capacity);
Geometry geom = Geometry.FromCapacity(capacity);
BiosPartitionTable table = BiosPartitionTable.Initialize(ms, geom);
Assert.AreEqual(0, table.Create(1 * 1024 * 1024, WellKnownPartitionType.WindowsFat, false));
Assert.AreEqual(1, table.Create(2 * 1024 * 1024, WellKnownPartitionType.WindowsFat, false));
Assert.AreEqual(2, table.Create(3 * 1024 * 1024, WellKnownPartitionType.WindowsFat, false));
long[] sectorCount = new long[] { table[0].SectorCount, table[1].SectorCount, table[2].SectorCount };
table.Delete(1);
Assert.AreEqual(2, table.Count);
Assert.AreEqual(sectorCount[2], table[1].SectorCount);
}