I have a SQL server that is used for both write and read. I have a host with 8 15K drives and I need to configure the SQL server and the Databases. I have thought of 3 scenarios
Raid 1 for OS, Raid 10 (4disk) for my Data file and Raid 1 logs file
Raid 1 for OS, Raid 10 (6disk) for my Data file and logs file
Raid 10 (8disks) for everything
Any other ideas?