Yes, Brian I know you know just sharing my result's and to others I am closer to completing the Dos restore. OK it seems turning on the writeback cache gives a worse result in SP. I don't know if that because i got raid but it's off on default so i should of left it off. I took another test with it off and the write/s went up to 50Mb Thinking it had beaten DS I then took another test straight after with Drive Snapshot. DS still came out tops. Also I did a test with DS without taking a hash file and it resulted in the same time taken with a hash file.