Если в error-логах MySQL есть такое:
InnoDB: A new raw disk partition was initialized or
InnoDB: innodb_force_recovery is on: we do not allow
InnoDB: database modifications by the user. Shut down
InnoDB: mysqld and edit my.cnf so that newraw is replaced
InnoDB: with raw, and innodb_force_… is removed.
правим my.cnf путем комментирования строки :
innodb_force_recovery=1
и перезагружаем мускул.