One setup suggested is on RAID10 array with 10 drives and one RAID1 with 2 drives for the log files. The second suggested setup is Array0 RAID1 with 2 drives for OS. Array1 RAID10 4 drives data files. Array2 RAID10 4 drives log files. Array3 RAID10 4 disks tempdb and local backups.

Tracie