private static DynamicVolume GetVolume(DiskGroupDatabase database, VolumeRecord volumeRecord, ComponentRecord componentRecord)
{
if (componentRecord.ExtentLayout == ExtentLayoutName.Concatenated)
{
if (componentRecord.NumberOfExtents == 1)
{
// Simple volume
return(GetSimpleVolume(database, componentRecord, volumeRecord));;
}
else
{
// spanned volume
SpannedVolume volume = GetSpannedVolume(database, componentRecord, volumeRecord);
return(volume);
}
}
else if (componentRecord.ExtentLayout == ExtentLayoutName.Stripe)
{
// striped volume
StripedVolume volume = GetStripedVolume(database, componentRecord, volumeRecord);
return(volume);
}
else if (componentRecord.ExtentLayout == ExtentLayoutName.RAID5)
{
Raid5Volume volume = GetRAID5Volume(database, componentRecord, volumeRecord);
return(volume);
}
else
{
return(null);
}
}
public static void ExtendStripedVolume(DiskGroupDatabase database, StripedVolume volume, long numberOfAdditionalExtentSectors)
{
if (numberOfAdditionalExtentSectors % volume.SectorsPerStripe > 0)
{
throw new ArgumentException("Number of additional sectors must be multiple of stripes per sector");
}
List <DatabaseRecord> records = new List <DatabaseRecord>();
VolumeRecord volumeRecord = database.FindVolumeByVolumeGuid(volume.VolumeGuid);
volumeRecord = (VolumeRecord)volumeRecord.Clone();
volumeRecord.SizeLBA += (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(numberOfAdditionalExtentSectors * volume.NumberOfColumns, volume.BytesPerSector);
records.Add(volumeRecord);
// we only want to extend the last extent in each column
foreach (DynamicColumn column in volume.Columns)
{
DynamicDiskExtent lastExtent = column.Extents[column.Extents.Count - 1];
ExtentRecord extentRecord = database.FindExtentByExtentID(lastExtent.ExtentID);
extentRecord = (ExtentRecord)extentRecord.Clone();
extentRecord.SizeLBA += (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(numberOfAdditionalExtentSectors, volume.BytesPerSector);
records.Add(extentRecord);
DiskRecord diskRecord = database.FindDiskByDiskID(extentRecord.DiskId); // we should update the disk, see Database.cs
diskRecord = (DiskRecord)diskRecord.Clone();
records.Add(diskRecord);
}
database.UpdateDatabase(records);
}
private static StripedVolume GetStripedVolume(DiskGroupDatabase database, ComponentRecord componentRecord, VolumeRecord volumeRecord)
{
List <DynamicColumn> columns = GetDynamicVolumeColumns(database, componentRecord, volumeRecord);
int bytesPerSector = DynamicVolume.GetBytesPerSector(columns, DynamicColumn.DefaultBytesPerSector);
int sectorsPerStripe = (int)PublicRegionHelper.TranslateFromPublicRegionSizeLBA((int)componentRecord.StripeSizeLBA, bytesPerSector);
StripedVolume volume = new StripedVolume(columns, sectorsPerStripe, volumeRecord.VolumeGuid, database.DiskGroupGuid);
volume.VolumeID = volumeRecord.VolumeId;
volume.Name = volumeRecord.Name;
volume.DiskGroupName = database.DiskGroupName;
return(volume);
}
public static void ResumeAddDiskToRaid5Volume(List <DynamicDisk> disks, StripedVolume stripedVolume, AddDiskOperationBootRecord resumeRecord, ref long bytesCopied)
{
List <DynamicColumn> columns = stripedVolume.Columns;
DynamicDiskExtent newExtent = columns[columns.Count - 1].Extents[0];
columns.RemoveAt(columns.Count - 1);
Raid5Volume volume = new Raid5Volume(columns, stripedVolume.SectorsPerStripe, stripedVolume.VolumeGuid, stripedVolume.DiskGroupGuid);
volume.VolumeID = stripedVolume.VolumeID;
volume.Name = stripedVolume.Name;
volume.DiskGroupName = stripedVolume.DiskGroupName;
ResumeAddDiskToRaid5Volume(disks, volume, newExtent, resumeRecord, ref bytesCopied);
}