mysql服务器突然启动不起来了，查看日志，显示如下错误：
2023-02-11T05:23:21.555101Z 1 [ERROR] [MY-012271] [InnoDB] The innodb_system data file 'ibdata1' must be writable
2023-02-11T05:23:21.555669Z 1 [ERROR] [MY-012278] [InnoDB] The innodb_system data file 'ibdata1' must be writable
2023-02-11T05:23:21.556238Z 1 [ERROR] [MY-010334] [Server] Failed to initialize DD Storage Engine
2023-02-11T05:23:21.556966Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
删除配置文件中datadir的目录下面的两个文件即可：
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