[dba-SQLServer] SQL Server File locations and speed

Does anyone have any insight on the pros and cons of using a (fast) Raid5 as
one big partition which holds the database data files as well as the log
files, vs breaking a single raid5 array down into partitions and placing the
log files on one partition and the data files on another, vs building two
raid arrays and placing the data files on one raid array and the log files
on another.
 
John W. Colby
Colby Consulting
www.ColbyConsulting.com