title: MySQL not starting, InnoDB not available
body: <p>A client's server is running MySQL 5.0. Last night the server automatically restarted to install Windows updates. After restarting, MySQL does not want to run any more. The MySQL log indicates that it shut down normally. Windows logs shows the service can't start because "Default storage engine (InnoDB) is not available". MySQL was running fine for years before this and nothing was recently changed.</p>
  
  <p>Daily backups are made of the data, and the installation directory is still there.</p>
  
  <p>How do I get the MySQL service running again? </p>
  
  <p>EDIT: I just noticed the following in the server.err file in the data folder:</p>
  
  <pre><code>InnoDB: Error: log file .\ib_logfile0 is of different size 0 10485760 bytes
  InnoDB: than specified in the .cnf file 0 25165824 bytes!
  120112  5:16:30 [ERROR] Default storage engine (InnoDB) is not available
  120112  5:16:30 [ERROR] Aborting
  </code></pre>