First, thanks for all the helpful information at your site. I was looking over your articlehttp://www.sql-server-performance.com/q&a38.asp and see your recommendation if possible to â€œWe locate the SQL Server binaries and swap file on its own 9GB RAID 1 array. We then locate the transaction log files on its own 18GB or larger RAID 1 array. And then we locate the data files on its own RAID 5 or RAID 10 array. This is an expensive way to allocate arrays, but we find that it offers both convenience and performance, along with a high degree of redundancyâ€ Im hoping you can help me with a couple of questions? We have a new HP DL380 with 2 SCSI controllers and 6 15k drives. Dual processor with 4gb ram. We currently have 1 controller with 2 of the drives setup as Raid 1, with a C: for the OS and a D partition. The second SCSI controller has 4 drives setup as Raid10 setup as Drive E My thoughts are to leave only the OS on C, mainly in case we ever have an OS problem, we could reinstall to C; and have SQL Install and log files on D: partion. Then on E, I would put the SQL Database. 1: What would you recommend as the optimal setup? 2. Would it be better to make 3 Raid 1 setups using 2 disks each instead and if so put what where? 3. Do you know if there is a performance hit if the scsi controller was setup with 2 or more arrays? Thanks in advance!