"I need change Strip Element Size " At one times you were able to change the stripe size in raid 1 without losing data but recently it was tried on a new controller and it did not work, never worked on a raid 5. Unless you have a server serving a specific data size, such a dedicated database or exchange server, changing the default size rarely increases performance. If you really need too, you will need to reinstall from scratch, image or clone. The virtual disk policies are ALL safe to change after an array is created . Again , generally the defaults are the best choice. If you do want to continue, use multiple benchmarks before and after your changes. Generally changing the defaults is again needed only for very specific data chunk sizes. Changing the default "write cache policy"  to write through or disabled, will negatively affect performance. Personally I do not like enabling the disk cache policy, as it creates more chance of losing data if a disk fails.    
Dell PE R430 (PERC H730 mini) all drivers is update.I need change Strip Element Size and Read Policy.Strip Element Size - how?Read Policy, I need to change Read Ahead to Adaptive Read Ahead. In BIOS i can't find this option. But if I configure RAID from iDRAC, (where Deploy OS) Adaptive Read Ahead - is appear. Why? [IMAGE][IMAGE]
Can I change the settings of RAID without delete the virtual disk?