Just sounds like the "Hardware Consultant" and I use that term loosely, should investigate the reason why the controller isn't performing correctly, as such a statement on his part only confirms he doesn't know what he is talking about, you can quote me directly.
Why didn't he add one more drive and go to RAID10, this over comes the need for the controller to calculate the offsets and greatly increases performance.

>Hi All,
>
>I have a client with 22 terminals that has been having serious speed issues, all along my application has been blamed, but following days of work we traced it to a server issue (copied data to a workstation and ran peer-2-peer and ran 6 workstations with no loss of performance).
>
>The "Hardware Consultant" is now saying that the issue is a compatibility issue with VFP and RAID 5, he has "proved" his point by putting a new server in without RAID 5 which is performing well.
>
>I am not convinced of his conclusion and I am not aware of any VFP with RAID5 issues, are any know?
>
>Gary.