[Ubuntu] 将mysql的数据库转移到ntfs分区下面

我的PHP环境是由apache+php+mysql+phpmyadmin搭建起来的，详情请参考我的另一篇文章：

[Ubuntu] 转载：Ubuntu下安装apache+php+mysql+phpmyadmin 

但由于我是使用win7+ubuntu的，虽然基本上开发都在ubuntu下面，但有时也需要在win7下面运行一下网站的，所以我就要把mysql转移到ntfs上面去，但其中遇到了比较麻烦的问题，就是ntfs挂载在ubuntu下面的文件权限都是777的，具体操作过程遇到的问题和解决如下：

1. 修改 /etc/mysql/my.cnf

将

datadir        = /var/lib/mysql 

改为

datadir        = /media/MyDocuments/mysql 

尝试重启mysql

sudo /etc/init.d/mysql stop

sudo /etc/init.d/mysql start 

结果mysql怎么也重启不来

查看日志，/var/log/mysql/error.log，如下：

100819 15:10:20 [Note] Plugin 'FEDERATED' is disabled.
^G/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
100819 15:10:20 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
100819 15:10:20  InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: 'open'.
InnoDB: Cannot continue operation.

查了很久，基本都是说apparmor的问题，其实这个在my.cnf里面也有提到过了，

# * IMPORTANT
#   If you make changes to these settings and your system uses apparmor, you may
#   also need to also adjust /etc/apparmor.d/usr.sbin.mysqld.

ok，这样的话，就明白很多了，修改/etc/apparmor.d/usr.sbin.mysqld即可。

将

/var/lib/mysql/ r,
/var/lib/mysql/** rwk,

改为

#/var/lib/mysql/ r,
#/var/lib/mysql/** rwk,
/media/MyDocuments/mysql/ r,
/media/MyDocuments/mysql/** rwk,

再运行一下：/etc/init.d/apparmor reload 

重启mysql，搞掂！