Mysql won't start - ibdata1 corrupt? - operating system error number 13 - permissions issue

Question

Server shutdown from power failure.
Mysql will not start now.
Disk is not full. Syslog is below

Oct 11 15:03:31 joe mysqld_safe[24757]: started
Oct 1         


        

Answer 1

The file is not corrupt. You can find out the source of these errors with 'perror'. i.e.

toaster:~ morgo$ perror 13
OS error code  13:  Permission denied

InnoDB has corruption detection (page checksums) and would happily tell you if that were the problem.

Either the directory permissions have changed, or your my.cnf file has been hosed, and it's trying to recreate data files somewhere else.