重裝mysql無法啟動服務的問題

今天由於一些原因需要把mysql刪除了然後重新安裝，但是重新安裝mysql之後無法重啟了，下面我把我的解決辦法分享給各位同學，希望對大家有所幫助。

Linux下mysql重裝後無法重啟解決辦法

之前裝的mysql5.1，但是經過系統還原後服務沒有了，干脆升級到5.5，但是安裝好了，配置時最後一步就是啟動不了！

查看日志:programdata/data/pc.err發現：

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

在網上一查，原來要將ib_logfile0,ib_logfile1,還有ibdata1這三個文件刪掉才行，它們分別在data和programdata目錄中(在配置時由你指定的)。

windows下mysql重裝後無法重啟解決辦法

解決方法:

1: 先卸載mysql, 手動將其安裝目錄裡沒有刪除干淨的文件全部刪除.

2: 將C:/ProgramData/MySQL 裡有關mqsql的文件全部刪除.

3: 重新安裝 mysql 程序.

mysql服務就可以正常啟動了