title: mysql not working , it is not starting
body: <p>here is a bit of the error log . </p>
  
  <pre><code>160422 10:45:00 [Note] InnoDB: The log sequence numbers 1665244 and 1665244   in ibdata files do not match the log sequence number 15857945 in the ib_logfiles!
  160422 10:45:00 [Note] InnoDB: Database was not shutdown normally!
  160422 10:45:00 [Note] InnoDB: Starting crash recovery.
  160422 10:45:00 [Note] InnoDB: Reading tablespace information from the .ibd files...
  160422 10:45:00 [Note] InnoDB: Restoring possible half-written data pages 
  160422 10:45:00 [Note] InnoDB: from the doublewrite buffer...
  160422 10:45:00 [Note] InnoDB: 128 rollback segment(s) are active.
  160422 10:45:00 [Note] InnoDB:  Percona XtraDB (http://www.percona.com) 5.6.22-72.0 started; log sequence number 15857945
  160422 10:45:00 [Note] InnoDB: !!! innodb_force_recovery is set to 2 !!!
  160422 10:45:00 [Note] Plugin 'FEEDBACK' is disabled.
  160422 10:45:00 [Note] Server socket created on IP: '::'.
  160422 10:45:00 [ERROR] mysqld.exe: Table '.\mysql\db' is marked as crashed and last (automatic?) repair failed
  160422 10:45:00 [ERROR] Fatal error: Can't open and lock privilege tables: Table '.\mysql\db' is marked as crashed and last (automatic?) repair failed
  </code></pre>
  
  <p>plz somebody help , i have one important database ,whose backup i have not made , i posted this question earlier ,but didnt got the answer ...this started when i was trying to access phpmyadmin , from then on mysql is not starting.</p>