前台开启：

[root@t1 x]# service mysqld start

Starting MySQL. ERROR! The server quit without updating PID file (/mydata/data/t1.pid).

后台告警日志显示：

err文件表示：

160316 02:33:39 mysqld_safe Starting mysqld daemon with databases from /mydata/data
2016-03-16 02:33:40 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use –explicit_defaults_for_timestamp server option (see documentation for more details).
^G/usr/local/mysql/bin/mysqld: File ‘./master-bin.index’ not found (Errcode: 13 – Permission denied)
2016-03-16 02:33:40 12415 [ERROR] Aborting

2016-03-16 02:33:40 12415 [Note] Binlog end
2016-03-16 02:33:40 12415 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

160316 02:33:40 mysqld_safe mysqld from pid file /mydata/data/t1.pid ended
160316 02:34:05 mysqld_safe Starting mysqld daemon with databases from /mydata/data
2016-03-16 02:34:05 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use –explicit_defaults_for_timestamp server option (see documentation for more details).
^G/usr/local/mysql/bin/mysqld: File ‘./master-bin.index’ not found (Errcode: 13 – Permission denied)
2016-03-16 02:34:05 12850 [ERROR] Aborting

2016-03-16 02:34:05 12850 [Note] Binlog end
2016-03-16 02:34:05 12850 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete

160316 02:34:05 mysqld_safe mysqld from pid file /mydata/data/t1.pid ended
160316 02:38:23 mysqld_safe Starting mysqld daemon with databases from /mydata/data
2016-03-16 02:38:23 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use –explicit_defaults_for_timestamp server option (see documentation for more details).

解决办法 ：

[root@t1 x]# ll /mydata/*
total 569380
-rw-r–r– 1 root  root 482344960 Mar 16 02:32 ibdata1
-rw-r–r– 1 root  root  50331648 Mar 16 02:32 ib_logfile0
-rw-r–r– 1 root  root  50331648 Mar 16 02:32 ib_logfile1
drwxr-xr-x 2 root  root      4096 Mar 16 02:32 jishibang
drwxr-xr-x 2 root  root      4096 Mar 16 02:32 mysql
drwxr-xr-x 2 root  root      4096 Mar 16 02:32 performance_schema
-rw-r—– 1 mysql root      1220 Mar 16 02:34 t1.err
drwxr-xr-x 2 root  root      4096 Mar 16 02:32 test
-rw-r–r– 1 root  root        23 Mar 16 02:32 xtrabackup_binlog_pos_innodb
-rw-r–r– 1 root  root       662 Mar 16 02:32 xtrabackup_info

[root@t1 x]# chown -R mysql.mysql /mydata/data/

[root@t1 x]# service mysqld start
Starting MySQL. SUCCESS! 

[root@t1 x]# ll /mydata/*
total 569380

参考：

http://nameyjj.blog.51cto.com/788669/632302

http://blog.csdn.net/aidenliu/article/details/6586775

http://blog.csdn.net/u010098331/article/details/50752640

http://blog.csdn.net/u010098331/article/details/50849643

http://blog.csdn.net/u010098331/article/details/50752667

http://blog.csdn.net/u010098331/article/details/50752645