I am about to take on a project where we are adding two new drives to our server. The server was not originally configured by us and we are questioning the performance. Currently we have a mirror for our OS We have 6 drives that are configured for RAID 5 (15k rpm)which has our data and 2 disk RAID 1 (10k rpm) that contains the logs. We are going to remove the two slower drives from the RAID 1 and replace them with 4 smaller 15k drives which will be a RAID 5. Is this the right thing to do? I would prefer a RAID 0 for Transaction Logs but if we lose a disk, SQL would stop functioning.