public NTFSVolume(Volume volume, bool useMftMirror)
{
m_volume = volume;
byte[] bootSector = m_volume.ReadSector(0);
m_bootRecord = NTFSBootRecord.ReadRecord(bootSector);
if (m_bootRecord == null)
{
throw new InvalidDataException("The volume does not contain a valid NTFS boot record");
}
m_mft = new MasterFileTable(this, useMftMirror);
m_volumeInformation = GetVolumeInformationRecord();
if (m_volumeInformation.IsDirty)
{
throw new NotSupportedException("The volume is marked dirty, please run CHKDSK to repair the volume");
}
// Note: We could support NTFS v1.2 with minimal effort, but there isn't really any point.
if (!(m_volumeInformation.MajorVersion == 3 && m_volumeInformation.MinorVersion == 0) &&
!(m_volumeInformation.MajorVersion == 3 && m_volumeInformation.MinorVersion == 1))
{
throw new NotSupportedException(String.Format("NTFS v{0}.{1} is not supported", m_volumeInformation.MajorVersion, m_volumeInformation.MinorVersion));
}
m_logFile = new LogFile(this);
m_logClient = new NTFSLogClient(m_logFile);
m_bitmap = new VolumeBitmap(this);
NumberOfClustersRequiredToExtendIndex = (int)Math.Ceiling((double)(IndexData.ExtendGranularity * m_bootRecord.BytesPerIndexRecord) / m_bootRecord.BytesPerCluster);
}
public NTFSVolume(Volume volume, bool useMftMirror)
{
m_volume = volume;
byte[] bootSector = m_volume.ReadSector(0);
m_bootRecord = NTFSBootRecord.ReadRecord(bootSector);
if (m_bootRecord != null)
{
m_mft = new MasterFileTable(this, useMftMirror);
m_bitmap = new VolumeBitmap(this);
m_volumeInformation = GetVolumeInformationRecord();
}
}
private static void WriteVolumeBitmap(Volume volume, long volumeBitmapStartSector, long volumeClusterCount, long numberOfClustersInUse)
{
int transferSize = (int)Math.Ceiling((double)numberOfClustersInUse / (volume.BytesPerSector * 8));
byte[] transferBytes = new byte[transferSize * volume.BytesPerSector];
for (int clusterIndex = 0; clusterIndex < numberOfClustersInUse; clusterIndex++)
{
VolumeBitmap.SetBit(transferBytes, clusterIndex);
}
volume.WriteSectors(volumeBitmapStartSector, transferBytes);
long numberOfVolumeBitmapSectors = (long)Math.Ceiling((double)volumeClusterCount / (volume.BytesPerSector * 8));
long sectorOffset = transferSize;
while (sectorOffset < numberOfVolumeBitmapSectors)
{
long sectorsRemaining = numberOfVolumeBitmapSectors - sectorOffset;
transferSize = (int)Math.Min(Settings.MaximumTransferSizeLBA, sectorsRemaining);
transferBytes = new byte[transferSize * volume.BytesPerSector];
volume.WriteSectors(volumeBitmapStartSector + sectorOffset, transferBytes);
sectorOffset += transferSize;
}
}
