public StorageAccessAlignment GetAlignment(SafeHandle hDevice)
{
StorageAccessAlignment alignment = new StorageAccessAlignment();
SafeAllocHandle <STORAGE_PROPERTY_QUERY> storagePropertyQueryPtr = null;
SafeAllocHandle <STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR> storageAlignmentPtr = null;
try {
STORAGE_PROPERTY_QUERY storagePropertyQuery = new STORAGE_PROPERTY_QUERY {
PropertyId = (uint)STORAGE_PROPERTY_ID.StorageAccessAlignmentProperty,
QueryType = (uint)STORAGE_QUERY_TYPE.PropertyStandardQuery
};
storagePropertyQueryPtr = new SafeAllocHandle <STORAGE_PROPERTY_QUERY>(storagePropertyQuery);
storageAlignmentPtr = new SafeAllocHandle <STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR>();
bool success = DeviceIoControl(hDevice, IOCTL_STORAGE_QUERY_PROPERTY,
storagePropertyQueryPtr, storagePropertyQueryPtr.SizeOf,
storageAlignmentPtr, storageAlignmentPtr.SizeOf,
out uint bytesReturns, IntPtr.Zero);
if (!success || bytesReturns == 0)
{
// Windows XP returns success, byte bytesReturns == 0.
m_Win32Error = Marshal.GetLastWin32Error();
return(null);
}
STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR storageAlignment = storageAlignmentPtr.ToStructure();
alignment.BytesPerCacheLine = (int)storageAlignment.BytesPerCacheLine;
alignment.BytesOffsetForCacheAlignment = (int)storageAlignment.BytesOffsetForCacheAlignment;
alignment.BytesPerLogicalSector = (int)storageAlignment.BytesPerLogicalSector;
alignment.BytesPerPhysicalSector = (int)storageAlignment.BytesPerPhysicalSector;
alignment.BytesOffsetForSectorAlignment = (int)storageAlignment.BytesOffsetForSectorAlignment;
} finally {
if (storagePropertyQueryPtr != null)
{
storagePropertyQueryPtr.Close();
}
if (storageAlignmentPtr != null)
{
storageAlignmentPtr.Close();
}
}
return(alignment);
}
private void AddAlignment(IDictionary <string, ResultOrError <StorageAccessAlignment> > dictionary, string path, XmlElement node)
{
if (node == null)
{
return;
}
if (dictionary.ContainsKey(path))
{
return;
}
// Because this is a complex type, The XML will always return the default value.
ResultOrError <StorageAccessAlignment> result = GetResultOrError <StorageAccessAlignment>(node);
if (result != null)
{
dictionary.Add(path, result);
return;
}
string bytesPerCacheLine = node["BytesPerCacheLine"].Attributes["result"].Value;
string bytesOffsetForCacheAlignment = node["BytesOffsetForCacheAlignment"].Attributes["result"].Value;
string bytesPerLogicalSector = node["BytesPerLogicalSector"].Attributes["result"].Value;
string bytesPerPhysicalSector = node["BytesPerPhysicalSector"].Attributes["result"].Value;
string bytesOffsetForSectorAlignment = node["BytesOffsetForSectorAlignment"].Attributes["result"].Value;
StorageAccessAlignment diskAlignment = new StorageAccessAlignment()
{
BytesPerCacheLine = int.Parse(bytesPerCacheLine, CultureInfo.InvariantCulture),
BytesOffsetForCacheAlignment = int.Parse(bytesOffsetForCacheAlignment, CultureInfo.InvariantCulture),
BytesPerLogicalSector = int.Parse(bytesPerLogicalSector, CultureInfo.InvariantCulture),
BytesPerPhysicalSector = int.Parse(bytesPerPhysicalSector, CultureInfo.InvariantCulture),
BytesOffsetForSectorAlignment = int.Parse(bytesOffsetForSectorAlignment, CultureInfo.InvariantCulture),
};
dictionary.Add(path, new ResultOrError <StorageAccessAlignment>(diskAlignment));
}
