RAID is actually operating at the LUN Level, not the RAID Group level…  When you first create a RAID Group Navisphere/Unisphere will let you select a RAID type which helps to make sure you use the correct number of disks for the RAID type you want to use. But, other than showing the RAID type in the RG details, it doesn’t actually do anything in the RG itself.  When you create the first LUN in that RAID Group you can select any RAID type that is valid for the number of disks in the RAID Group. You can select a different RAID type from what was previously selected for the RAID group itself. This will change the whole RAID Group. All LUNs in the RAID Group after the first LUN MUST be the same RAID type as the first LUN.  Richard J Anderson
should the storage pool raid level be the same as the lun?   the storage pool I have is raid1_0  when I start creating a lun, i can select different raid level types
raid type - storage pool and lun