In case of an operating system crash or power failure,
InnoDB itself does all the job of recovering
data. But to make sure that you can sleep well, observe the
Always run the MySQL server with the
--log-binoption, or even
--log-bin=, where the log file name is located on some safe media different from the drive on which the data directory is located. If you have such safe media, this technique can also be good for disk load balancing (which results in a performance improvement).