private void ParseBootSector()
{
var data = new byte[512];
DiskStream.Seek(0, SeekOrigin.Begin);
DiskStream.Read(data, 0, data.Length);
BootSector = BootSector.ParseData(data, data.Length, 0);
BytesPerFileRecord = BootSector.MftRecordSizeBytes;
SectorsPerRecord = BootSector.MftRecordSizeBytes / BootSector.BytesPerSector;
}
public static BootSector ParseData(byte[] data, int maxLength, int offset)
{
//// Debug.Assert(data.Length - offset >= 512);
//// Debug.Assert(0 <= offset && offset <= data.Length);
BootSector res = new BootSector();
res.JmpInstruction = new byte[3];
Array.Copy(data, offset, res.JmpInstruction, 0, 3);
res.OemCode = Encoding.ASCII.GetString(data, offset + 3, 8).Trim();
res.BytesPerSector = BitConverter.ToUInt16(data, offset + 11);
res.SectorsPerCluster = data[offset + 13];
res.ReservedSectors = BitConverter.ToUInt16(data, offset + 14);
res.MediaDescriptor = data[offset + 21];
res.SectorsPerTrack = BitConverter.ToUInt16(data, offset + 24);
res.NumberOfHeads = BitConverter.ToUInt16(data, offset + 26);
res.HiddenSectors = BitConverter.ToUInt32(data, offset + 28);
res.Usually80008000 = BitConverter.ToUInt32(data, offset + 36);
res.TotalSectors = BitConverter.ToUInt64(data, offset + 40);
res.MftCluster = BitConverter.ToUInt64(data, offset + 48);
res.MftMirrCluster = BitConverter.ToUInt64(data, offset + 56);
res.MftRecordSizeBytes = BitConverter.ToUInt32(data, offset + 64);
res.MftIndexSizeBytes = BitConverter.ToUInt32(data, offset + 68);
res.SerialNumber = BitConverter.ToUInt64(data, offset + 72);
res.Checksum = BitConverter.ToUInt32(data, offset + 80);
res.MftRecordSizeBytes = InterpretClusterCount(res.MftRecordSizeBytes);
res.MftIndexSizeBytes = InterpretClusterCount(res.MftRecordSizeBytes);
res.BootstrapCode = new byte[426];
Array.Copy(data, offset + 84, res.BootstrapCode, 0, 426);
res.Signature = new byte[2];
Array.Copy(data, offset + 510, res.Signature, 0, 2);
// Signature should always be this
//// Debug.Assert(res.Signature[0] == 0x55);
//// Debug.Assert(res.Signature[1] == 0xAA);
return(res);
}
