[CentOS] LSI Logic MegaRAID 8480 Storage controller policies?

Life is much better now that I'm using -h instead of the manual.

I have a new question about policies

Direct   and DisDskCache makes sense
Cached and EnDiskCache makes sense

not so sure about

Direct    and EnDskCache
Cached and DisDsk Cache

Do they make sense?

-- 
Drew Einhorn