public static void ResumeMoveExtent(List<DynamicDisk> disks, DynamicVolume volume, MoveExtentOperationBootRecord resumeRecord, ref long bytesCopied)
{
if (resumeRecord.OldStartSector == resumeRecord.NewStartSector)
{
throw new InvalidDataException("Invalid move record");
}
if (resumeRecord.RestoreFromBuffer)
{
// we need to use the backup buffer to restore the data that may have been overwritten
int extentIndex = DynamicDiskExtentHelper.GetIndexOfExtentID(volume.DynamicExtents, resumeRecord.ExtentID);
DynamicDiskExtent sourceExtent = volume.DynamicExtents[extentIndex];
byte[] backupBuffer = sourceExtent.Disk.ReadSectors((long)resumeRecord.BackupBufferStartSector, BackupBufferSizeLBA);
if (resumeRecord.OldStartSector < resumeRecord.NewStartSector)
{
// move right
long readCount = (long)resumeRecord.NumberOfCommittedSectors;
int sectorsToRead = BackupBufferSizeLBA;
long sectorIndex = sourceExtent.TotalSectors - readCount - sectorsToRead;
sourceExtent.WriteSectors(sectorIndex, backupBuffer);
System.Diagnostics.Debug.WriteLine("Restored to " + sectorIndex);
}
else
{
// move left
long sectorIndex = (long)resumeRecord.NumberOfCommittedSectors;
sourceExtent.WriteSectors(sectorIndex, backupBuffer);
System.Diagnostics.Debug.WriteLine("Restored to " + sectorIndex);
}
}
if (resumeRecord.OldStartSector < resumeRecord.NewStartSector)
{
MoveExtentRight(disks, volume, resumeRecord, ref bytesCopied);
}
else
{
MoveExtentLeft(disks, volume, resumeRecord, ref bytesCopied);
}
}
public void WriteSectors(long sectorIndex, byte[] data)
{
int sectorCount = data.Length / BytesPerSector;
List <ArrayPosition> writePositions = TranslateSectors(sectorIndex, sectorCount);
int bytesWritten = 0;
foreach (ArrayPosition writePosition in writePositions)
{
DynamicDiskExtent extent = m_extents[writePosition.DiskIndex];
byte[] extentBytes = new byte[writePosition.SectorCount * BytesPerSector];
Array.Copy(data, bytesWritten, extentBytes, 0, extentBytes.Length);
extent.WriteSectors(writePosition.SectorIndex, extentBytes);
bytesWritten += extentBytes.Length;
}
}
public override void WriteSectors(long sectorIndex, byte[] data)
{
m_extent.WriteSectors(sectorIndex, data);
}
