MySql Permission Question

I recently added a cache drive to my unraid server.  I am trying to move my plugins over to the cache drive and am stuck on MySQL.  I am using the most recent plugin from this thread http://lime-technology.com/forum/index.php?topic=20603.0

I get the following error:

130223 21:39:00 mysqld_safe Starting mysqld daemon with databases from /mnt/cache/unraid_apps/mysql
/usr/sbin/mysqld: Table 'mysql.plugin' doesn't exist
130223 21:39:00 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
130223 21:39:00 InnoDB: The InnoDB memory heap is disabled
130223 21:39:00 InnoDB: Mutexes and rw_locks use GCC atomic builtins
130223 21:39:00 InnoDB: Compressed tables use zlib 1.2.5
130223 21:39:00 InnoDB: Using Linux native AIO
130223 21:39:00 InnoDB: Initializing buffer pool, size = 128.0M
130223 21:39:00 InnoDB: Completed initialization of buffer pool
130223 21:39:00 InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name /mnt/cache/unraid_apps/mysql/ibdata1
InnoDB: File operation call: 'create'.
InnoDB: Cannot continue operation.
130223 21:39:00 mysqld_safe mysqld from pid file /var/run/mysql/mysql.pid ended

I tried changing the owner to mysql (which was the owner of all files in my prior plugin location).  That was not successful so as I test I changed permissions to 777 for all files but still get the same error.

I am not sure what to try next.  Ideas?