Hi, Iwamatsu-san, >I will change CONFIG_DEVTMPFS and CONFIG_DEVTMPFS_MOUNT are enabled in my new config. >I will test again and report here. I chanded CONFIG_DEVTMPFS and CONFIG_DEVTMPFS_MOUNT are enabled in my config. I built new kernel(2.6.35.10) and tested at USL-5P. New kernel mounts original system partition(sda1) and swap partition(sda2). This problem has been resolved. Thank you. Best regards, Isaka