101001 20:45:09 [ERROR] Default storage engine (InnoDB) is not available
101001 20:45:09 [ERROR] Aborting
101001 20:45:09 [Note] D:MySQL5binmysqld-nt: Shutdown complete
于是去网上搜索了一下，发现提示No valid checkpoint found.的解决办法：删除所有现有的ibdataN和ib_logfileN文件后，重启Mysql。于是照做，果然行了。
InnoDB: The first specified data file D:MySQL InnoDB Datafilesibdata1 did not exist:
InnoDB: a new database to be created!
101001 21:04:24 InnoDB: Setting file D:MySQL InnoDB Datafilesibdata1 size to 10 MB
InnoDB: Database physically writes the file full: wait...
101001 21:04:25 InnoDB: Log file .ib_logfile0 did not exist: new to be created
InnoDB: Setting log file .ib_logfile0 size to 109 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Progress in MB: 100
101001 21:04:27 InnoDB: Log file .ib_logfile1 did not exist: new to be created
InnoDB: Setting log file .ib_logfile1 size to 109 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Progress in MB: 100
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: Creating foreign key constraint system tables
InnoDB: Foreign key constraint system tables created
101001 21:04:31 InnoDB: Started; log sequence number 0 0
101001 21:04:32 [Note] D:MySQL5binmysqld-nt: ready for connections.
Version: '5.0.18-nt' socket: '' port: 3306 MySQL Community Edition (GPL)
奋斗了一天，总算成功地把MySQL从MyISAM转换成InnoDB引擎了。也学会了读懂错误日志文件err文件了。不过我就在想了，如果从一开始就按照上面的做，不知道会怎么样呢？
转自 DarkBlue blog
