重装mysql无法启动服务的问题

Linux下mysql重装后无法重启解决办法

之前装的mysql5.1，但是经过系统还原后服务没有了，干脆升级到5.5，但是安装好了，配置时最后一步就是启动不了！

查看日志:programdata/data/pc.err发现：

111121 22:16:50 InnoDB: Log file .ib_logfile0 did not exist: new to be created
InnoDB: Setting log file .ib_logfile0 size to 10 MB
InnoDB: Database physically writes the file full: wait…
111121 22:16:50 InnoDB: Log file .ib_logfile1 did not exist: new to be created
InnoDB: Setting log file .ib_logfile1 size to 10 MB
InnoDB: Database physically writes the file full: wait…
111121 22:16:50 InnoDB: Cannot initialize created log files because
111121 22:16:50 InnoDB: data files are corrupt, or new data files were
111121 22:16:50 InnoDB: created when the database was started previous
111121 22:16:50 InnoDB: time but the database was not shut down
111121 22:16:50 InnoDB: normally after that.
111121 22:16:50 [ERROR] Plugin ‘InnoDB’ init function returned error.
111121 22:16:50 [ERROR] Plugin ‘InnoDB’ registration as a STORAGE ENGINE failed.
111121 22:16:50 [ERROR] Unknown/unsupported storage engine: INNODB
111121 22:16:50 [ERROR] Aborting

在网上一查，原来要将ib_logfile0,ib_logfile1,还有ibdata1这三个文件删掉才行，它们分别在data和programdata目录中(在配置时由你指定的)。

windows下mysql重装后无法重启解决办法

解决方法:

1: 先卸载mysql, 手动将其安装目录里没有删除干净的文件全部删除.

2: 将C:/ProgramData/MySQL 里有关mqsql的文件全部删除.

3: 重新安装 mysql 程序.

mysql服务就可以正常启动了