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非正常关机时，innodb故障导致mysql无法启动的解决方法 一次非正常关机，mysql无法启动。查看err日志，显示： InnoDB: Starting crash recovery.InnoDB: Reading tablespace information from the .ibd files...InnoDB: Restoring possible half-written data pages from the doublewriteInnoDB: buffer...InnoDB: Error: trying to access page number 42949072 in space 0,InnoDB: space name ./ibdata1,InnoDB: which is outside the tablespace bounds.InnoDB: Byte offset 0, len 16384, i/o type 10.InnoDB: If you get this error at mysqld startup, please check thatInnoDB: your my.cnf matches the ibdata files that you have in theInnoDB: MySQL server. 120331 1:03:41 InnoDB: Assertion failure in thread 30732288 in file fil0fil.c line 4409InnoDB: We intentionally generate a memory trap.InnoDB: Submit a detailed bug report to http://bugs.mysql.com.InnoDB: If you get repeated assertion failures or crashes, evenInnoDB: immediately after the mysqld startup, there may beInnoDB: corruption in the InnoDB tablespace. Please refer toInnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.htmlInnoDB: about forcing recovery. 21:03:41 UTC - mysqld got signal 6 ; 没办法，只好在/etc/my.cnf中写入[mysqld] innodb_force_recovery = 4 但是仍然无法启动。改为：innodb_force_recovery = 6数据库可以读出来，在6的情况下，是无法修改数据库的，也无法插入，只能导出。 用mysqldump导出，再把innodb_force_recovery改为0，但是数据无法导入。 最后还是删除了数据库重建。 这是第二次遇到这种错误，标记一下。
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