下载安装mysql5.6.17，按照

http://jingyan.baidu.com/article/597035521d5de28fc00740e6.html

中所示的步骤执行，在运行net start mysql 一直报异常如下：

系统发生 1067 错误。 
进程意外终止。

查看错误日志如下：

2014-05-04 15:00:53 11452 [Note] Plugin 'FEDERATED' is disabled.
 MySQL: Table 'mysql.plugin' doesn't exist 

 2014-05-04 15:00:53 11452 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 

 2014-05-04 15:00:53 11452 [Note] InnoDB: Using atomics to ref count buffer pool pages 

 2014-05-04 15:00:53 11452 [Note] InnoDB: The InnoDB memory heap is disabled 

 2014-05-04 15:00:53 11452 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions 

 2014-05-04 15:00:53 11452 [Note] InnoDB: Compressed tables use zlib 1.2.3 

 2014-05-04 15:00:53 11452 [Note] InnoDB: Not using CPU crc32 instructions 

 2014-05-04 15:00:53 11452 [Note] InnoDB: Initializing buffer pool, size = 128.0M 

 2014-05-04 15:00:53 11452 [Note] InnoDB: Completed initialization of buffer pool 

 2014-05-04 15:00:53 11452 [Note] InnoDB: The first specified data file .\ibdata1 did not exist: a new database to be created! 

 2014-05-04 15:00:53 11452 [Note] InnoDB: Setting file .\ibdata1 size to 12 MB 

 2014-05-04 15:00:53 11452 [Note] InnoDB: Database physically writes the file full: wait... 

 2014-05-04 15:00:54 11452 [Note] InnoDB: Setting log file .\ib_logfile101 size to 48 MB 

 2014-05-04 15:00:54 11452 [Note] InnoDB: Setting log file .\ib_logfile1 size to 48 MB 

 2014-05-04 15:00:55 11452 [Note] InnoDB: Renaming log file .\ib_logfile101 to .\ib_logfile0 

 2014-05-04 15:00:55 11452 [Warning] InnoDB: New log files created, LSN=45781 

 2014-05-04 15:00:55 11452 [Note] InnoDB: Doublewrite buffer not found: creating new 

 2014-05-04 15:00:55 11452 [Note] InnoDB: Doublewrite buffer created 

 2014-05-04 15:00:55 11452 [Note] InnoDB: 128 rollback segment(s) are active. 

 2014-05-04 15:00:56 11452 [Warning] InnoDB: Creating foreign key constraint system tables. 

 2014-05-04 15:00:56 11452 [Note] InnoDB: Foreign key constraint system tables created 

 2014-05-04 15:00:56 11452 [Note] InnoDB: Creating tablespace and datafile system tables. 

 2014-05-04 15:00:56 11452 [Note] InnoDB: Tablespace and datafile system tables created. 

 2014-05-04 15:00:56 11452 [Note] InnoDB: Waiting for purge to start 

 2014-05-04 15:00:57 11452 [Note] InnoDB: 5.6.17 started; log sequence number 0 

 2014-05-04 15:00:57 11452 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: d7621764-d359-11e3-a50b-b888e38c7530. 

 2014-05-04 15:00:57 11452 [Note] Server hostname (bind-address): '*'; port: 3306 

 2014-05-04 15:00:57 11452 [Note] IPv6 is available. 

 2014-05-04 15:00:57 11452 [Note]   - '::' resolves to '::'; 

 2014-05-04 15:00:57 11452 [Note] Server socket created on IP: '::'. 

2014-05-04 15:00:57 11452 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist


这是因为my.ini文件中的datadir是自定义的路径，数据库没有初始化，所以将mysql5.6.17安装路径中的data文件中的所有文件拷贝一份到datadir设置的路径下。ok，问题解决。