* about 825KB (1650 blocks), Env is stored after the image, and the env size is
* 0x2000 (16 blocks), 8 + 1650 + 16 = 1674, enlarge it to 1680.
*/
* about 825KB (1650 blocks), Env is stored after the image, and the env size is
* 0x2000 (16 blocks), 8 + 1650 + 16 = 1674, enlarge it to 1680.
*/