/// <summary>
/// CheckTrim Checks for trim descriptor
/// </summary>
/// <param name="DiskIndex">Physical disk index</param>
/// <returns>
/// true if trim is enabled else false.
/// </returns>
private static bool CheckTrim(int DiskIndex)
{
DEVICE_TRIM_DESCRIPTOR TrimDesc = new DEVICE_TRIM_DESCRIPTOR();
STORAGE_PROPERTY_QUERY StorageQuery = new STORAGE_PROPERTY_QUERY();
uint BytesReturned = 0;
StorageQuery.PropertyId = STORAGE_PROPERTY_ID.StorageDeviceTrimProperty;
StorageQuery.QueryType = STORAGE_QUERY_TYPE.PropertyStandardQuery;
IntPtr StorageQueryPtr = Marshal.AllocHGlobal(Marshal.SizeOf(StorageQuery));
IntPtr TrimDescPtr = Marshal.AllocHGlobal(Marshal.SizeOf(TrimDesc));
Marshal.StructureToPtr(StorageQuery, StorageQueryPtr, false);
Marshal.StructureToPtr(TrimDesc, TrimDescPtr, false);
SafeFileHandle physicalDisk = DeviceIO.CreateFile(
"\\\\.\\PhysicalDrive" + DiskIndex,
GENERIC_READ,
FILE_SHARE_READ,
IntPtr.Zero,
OPEN_EXISTING,
FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH,
IntPtr.Zero);
bool rs = DeviceIoControl(physicalDisk, IOCTL_STORAGE_QUERY_PROPERTY, StorageQueryPtr,
(uint)Marshal.SizeOf(StorageQuery), TrimDescPtr, (uint)Marshal.SizeOf(TrimDesc),
ref BytesReturned, IntPtr.Zero);
if (rs == false)
{
throw new Exception();
}
TrimDesc = (DEVICE_TRIM_DESCRIPTOR)Marshal.PtrToStructure(TrimDescPtr, typeof(DEVICE_TRIM_DESCRIPTOR));
return(TrimDesc.TrimEnabled);
}
/// <summary>
/// Opens file handle for the required drive.
/// </summary>
/// <param name="id"></param>
/// <param name="desiredAccess"></param>
/// <returns>
/// Pointer to the drive
/// </returns>
private SafeFileHandle OpenFile(string id, FileAccess desiredAccess)
{
uint access;
switch (desiredAccess)
{
case FileAccess.Read:
access = DeviceIO.GENERIC_READ;
break;
case FileAccess.Write:
access = DeviceIO.GENERIC_WRITE;
break;
case FileAccess.ReadWrite:
access = DeviceIO.GENERIC_READ | DeviceIO.GENERIC_WRITE;
break;
default:
access = DeviceIO.GENERIC_READ;
break;
}
SafeFileHandle ptr = DeviceIO.CreateFile(
id,
access,
DeviceIO.FILE_SHARE_READ,
IntPtr.Zero,
DeviceIO.OPEN_EXISTING,
DeviceIO.FILE_FLAG_NO_BUFFERING | DeviceIO.FILE_FLAG_WRITE_THROUGH,
IntPtr.Zero);
if (ptr.IsInvalid)
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
return(ptr);
}