我在windows 7环境下安装了mysql。当我尝试从命令行启动服务器时：mysqld --user=root
我收到以下消息：
120914 15:47:04 [Warning] Can't create test file C:\Program Files\MySQL\MySQL Server 5.5\data\SFO1502128830A.lower-test
120914 15:47:04 [Warning] Can't create test file C:\Program Files\MySQL\MySQL Server 5.5\data\SFO1502128830A.lower-test
120914 15:47:04 [Note] Plugin 'FEDERATED' is disabled.
120914 15:47:04 InnoDB: The InnoDB memory heap is disabled
120914 15:47:04 InnoDB: Mutexes and rw_locks use Windows interlocked functions
120914 15:47:04 InnoDB: Compressed tables use zlib 1.2.3
120914 15:47:04 InnoDB: Initializing buffer pool, size = 128.0M
120914 15:47:04 InnoDB: Completed initialization of buffer pool
120914 15:47:04 InnoDB: Operating system error number 5 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory. It may also be you have created a subdirectory
InnoDB: of the same name as a data file.
InnoDB: File name .\ibdata1
InnoDB: File operation call: 'create'.
InnoDB: Cannot continue operation.
请指教，谢谢，