Hello All, I have a question were I need help. We are going to install a SAN in our environment. We have an ERP application which uses SQL server. This application must have a good performance. Now I have the assignment of configuring the best performance for our SQL server. Unfortunately I don't have any experience in a San environment. I have a budget for 24 disks 10k 300GB. I want to have a raid 10 set. What do I have to do? I also have a spare scci controller and 2 x 72 GB 15 RPM scsi disks. What do I have to do? Make 1 big partition where the log files and data file are located on? Use the 2 disks for my log files? Put the sql server installation on Local disks? Put read back cache on on the SAN? Which cluster size Do I need..etc.. we have on this server 3 production databases. 2 small ones and 1 database which is 350 GB. with a log file of 10 GB. I also have 1 more question. Our main database (350GB) is splitted in 10 data files. This was done in the past were we had different disk sets. No when I put this on a SAN this has no advantage anymore. Does these 10 files have a worser performance then putting the data in 1 big database file? Thank you in advance for your help. Rival.