well if you mutiplex at the file level, you have prtection against acidentally deleting a file for example. With one you are only protected for disk failure On 3/20/06, Ray Stell <stellr@xxxxxxxxxx> wrote: My question is about the redundancy of the control/redo dbf. What is the statistical argument for running with one control file on a 5 disk/ raid 5 vs splitting the array and duplexing the to different filesystems on stand-alone disks?