You should be asking the user to provide you with expected IO or bandwidth requirements, is the IO random or sequential, is it small block or large block, what are the response time requirements, etc. Make them provide you with the data that you need to determine the number and type of disks and raid type.  glen
 Hi,   I'm using metaluns in Clariion/CX4-480 and I'm wondering what is the minimum size for a metalun. Some people here are asking for 20GB metaluns, is it right?   Thanks  
Best size for a metalun.