private void GetDeviceInformation()
{
if (m_VolumeData.VolumeDevicePath == null && IsDriveLetter(m_VolumeData.VolumeDrive))
{
string drive = string.Format("{0}{1}",
m_VolumeData.VolumeDrive.TrimEnd(new[] { System.IO.Path.DirectorySeparatorChar, System.IO.Path.AltDirectorySeparatorChar }),
System.IO.Path.DirectorySeparatorChar);
m_VolumeData.DriveType = m_OS.GetDriveType(drive);
return;
}
m_VolumeData.DriveType = m_OS.GetDriveType(m_VolumeData.VolumeDevicePathSlash);
m_VolumeData.VolumeQuery = m_OS.GetVolumeInformation(m_VolumeData.VolumeDevicePathSlash);
m_VolumeData.FreeSpace = m_OS.GetDiskFreeSpace(m_VolumeData.VolumeDevicePathSlash);
// For floppy drives, m_OS.GetMediaPresent is false, even if media is present. Looking into the sources from
// .NET, the DriveInfo class checks if the file attribute directory bit is set instead. So use that first,
// and only if it fails, then use the IOCTL later.
System.IO.FileAttributes attr = m_OS.GetFileAttributes(m_VolumeData.VolumeDevicePathSlash);
if ((int)attr != -1)
{
m_VolumeData.MediaPresent = (attr & System.IO.FileAttributes.Directory) != 0;
}
SafeHandle hDevice = m_OS.CreateFileFromDevice(m_VolumeData.VolumeDevicePath);
try {
m_OS.RefreshVolume(hDevice);
m_VolumeData.Extents = m_OS.GetDiskExtents(hDevice);
m_VolumeData.DeviceQuery = m_OS.GetStorageDeviceProperty(hDevice);
if ((int)attr == -1)
{
m_VolumeData.MediaPresent = m_OS.GetMediaPresent(hDevice);
}
m_VolumeData.HasSeekPenalty = m_OS.IncursSeekPenalty(hDevice);
m_VolumeData.DeviceNumber = m_OS.GetDeviceNumberEx(hDevice);
if (m_VolumeData.DeviceNumber == null)
{
m_VolumeData.DeviceNumber = m_OS.GetDeviceNumber(hDevice);
}
m_VolumeData.PartitionInfo = m_OS.GetPartitionInfo(hDevice);
m_VolumeData.DiskGeometry = m_OS.GetDiskGeometry(hDevice);
m_VolumeData.Alignment = m_OS.GetAlignment(hDevice);
m_VolumeData.DiskReadOnly = m_OS.IsReadOnly(hDevice);
} finally {
hDevice.Close();
}
}