[arch-general] mysql won't start after upgrade

[Scott Weisman]

I just upgraded MySQL on my Arch box to the latest version (5.1.33-1),
and all of a sudden, MySQL won't start.

I get the following in my mysql.err file (in /var/lib/mysql):

090412 07:53:21 mysqld_safe Starting mysqld daemon with databases from
/var/lib/mysql
/usr/sbin/mysqld: Table 'mysql.plugin' doesn't exist
090412  7:53:21 [ERROR] Can't open the mysql.plugin table. Please run
mysql_upgrade to create it.
InnoDB: Error: log file /var/lib/mysql/ib_logfile0 is of different
size 0 5242880 bytes
InnoDB: than specified in the .cnf file 0 16777216 bytes!
090412  7:53:21 [ERROR] Plugin 'InnoDB' init function returned error.
090412  7:53:21 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
090412  7:53:21 [ERROR] /usr/sbin/mysqld: unknown variable
'innodb_log_arch_dir=/var/lib/mysql'
090412  7:53:21 [ERROR] Aborting
090412  7:53:21 [Warning] Forcing shutdown of 2 plugins
090412  7:53:21 [Note] /usr/sbin/mysqld: Shutdown complete
090412 07:53:21 mysqld_safe mysqld from pid file
/var/lib/mysql/humidor.pid ended

I run mysql_upgrade, as instructed, but it also doesn't work. It
expects a working daemon of MySQL, which as the above log output
attests, isn't available.

Can someone help?! Until this upgrade, MySQL has run flawlessly for years.

Thanks,

Scott