/// <returns>Number of bytes</returns>
public static long GetMaximumSizeToExtendDynamicDiskExtent(DynamicDiskExtent targetExtent)
{
DynamicDisk disk = DynamicDisk.ReadFromDisk(targetExtent.Disk);
PrivateHeader privateHeader = disk.PrivateHeader;
List <DynamicDiskExtent> extents = DynamicDiskHelper.GetDiskExtents(disk);
if (extents == null)
{
throw new InvalidDataException("Cannot read extents information from disk");
}
long endOfData = (long)((privateHeader.PublicRegionStartLBA + privateHeader.PublicRegionSizeLBA) * (ulong)disk.BytesPerSector);
long max = endOfData - (targetExtent.FirstSector * targetExtent.BytesPerSector + targetExtent.Size); // space from the extent end to the end of the disk
foreach (DynamicDiskExtent extent in extents)
{
if (extent.FirstSector > targetExtent.FirstSector)
{
long spaceBetweenExtents = (extent.FirstSector - targetExtent.FirstSector) * disk.BytesPerSector - targetExtent.Size;
max = Math.Min(max, spaceBetweenExtents);
}
}
return(max);
}
private static List <DynamicColumn> GetDynamicVolumeColumns(List <DynamicDisk> disks, VolumeManagerDatabase database, ComponentRecord componentRecord, VolumeRecord volumeRecord)
{
// extentRecords are sorted by offset in column
List <ExtentRecord> extentRecords = database.FindExtentsByComponentID(componentRecord.ComponentId);
if (componentRecord.NumberOfExtents != extentRecords.Count || extentRecords.Count == 0)
{
// database record is invalid
throw new InvalidDataException("Number of extents in component record does not match actual number of extent records");
}
SortedList <uint, List <DynamicDiskExtent> > columns = new SortedList <uint, List <DynamicDiskExtent> >();
foreach (ExtentRecord extentRecord in extentRecords)
{
DiskRecord diskRecord = database.FindDiskByDiskID(extentRecord.DiskId);
DynamicDisk disk = DynamicDiskHelper.FindDisk(disks, diskRecord.DiskGuid); // we add nulls as well
DynamicDiskExtent extent = DynamicDiskExtentHelper.GetDiskExtent(disk, extentRecord);
if (columns.ContainsKey(extentRecord.ColumnIndex))
{
columns[extentRecord.ColumnIndex].Add(extent);
}
else
{
List <DynamicDiskExtent> list = new List <DynamicDiskExtent>();
list.Add(extent);
columns.Add(extentRecord.ColumnIndex, list);
}
}
List <DynamicColumn> result = new List <DynamicColumn>();
foreach (List <DynamicDiskExtent> extents in columns.Values)
{
result.Add(new DynamicColumn(extents));
}
return(result);
}
private static SimpleVolume GetSimpleVolume(List <DynamicDisk> disks, VolumeManagerDatabase database, ComponentRecord componentRecord, VolumeRecord volumeRecord)
{
List <ExtentRecord> extentRecords = database.FindExtentsByComponentID(componentRecord.ComponentId);
if (extentRecords.Count == 1)
{
ExtentRecord extentRecord = extentRecords[0];
DiskRecord diskRecord = database.FindDiskByDiskID(extentRecord.DiskId);
DynamicDisk disk = DynamicDiskHelper.FindDisk(disks, diskRecord.DiskGuid); // we add nulls as well
DynamicDiskExtent extent = DynamicDiskExtentHelper.GetDiskExtent(disk, extentRecord);
SimpleVolume volume = new SimpleVolume(extent, volumeRecord.VolumeGuid, database.DiskGroupGuid);
volume.VolumeID = volumeRecord.VolumeId;
volume.Name = volumeRecord.Name;
volume.DiskGroupName = database.DiskGroupName;
return(volume);
}
else
{
// component / extent records are invalid
throw new InvalidDataException("Number of extents in component record does not match actual number of extent records");
}
}
