http://blog.51yip.com/mysql/1457.html 修复 类似 ：Incorrect key file for table './tg/dxad.MYI'; try to repair it.
mysql的表 " is marked as crashed and should be repaired":https://www.cnblogs.com/hakuci/archive/2012/03/20/2407723.html
linux下可能是大小写的问题
