This is a message when mysql tried to restart:
/usr/sbin/mysqld: File '/var/log/mysqld.slow.log' not found (Errcode: 13)
121230 1:28:14 [ERROR] Could not use /var/log/mysqld.slow.log for logging (error 13). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it.
121230 1:28:14 [ERROR] /usr/sbin/mysqld: Table './mysql/db' is marked as crashed and should be repaired
121230 1:28:14 [ERROR] Fatal error: Can't open and lock privilege tables: Table './mysql/db' is marked as crashed and should be repaired
/usr/sbin/mysqld: File '/var/log/mysqld.slow.log' not found (Errcode: 13)
121230 1:28:14 [ERROR] Could not use /var/log/mysqld.slow.log for logging (error 13). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it.
121230 1:28:14 [ERROR] /usr/sbin/mysqld: Table './mysql/db' is marked as crashed and should be repaired
121230 1:28:14 [ERROR] Fatal error: Can't open and lock privilege tables: Table './mysql/db' is marked as crashed and should be repaired