+ DISK_IOCTL_PRECACHE,\r
+ \r
+ /**\r
+ * ioclt(..., Uint64 *Region[2])\r
+ * \brief Asks to driver to flush the region back to disk\r
+ * \param Region 64-bit Address and Size pair describing the area to flush\r
+ * \note If Region[0] == -1 then the entire disk's cache is flushed\r
+ * \return Number of blocks flushed (or 0 for entire disk)\r
+ */\r
+ DISK_IOCTL_FLUSH\r