出错啦！
出错文件：root/conn.php
出错行数：14
错误信息：session_start() [function.session-start]: open(D:\soft\phpStudy4IIS\tmp\tmp\sess_inuioq63pjp1p4mk6441apqlh4, O_RDWR) failed: No space left on device (28)
错误级别：2