thanks for answering, but it seemed it is quite difficult to know if a RAID is a Fake or a real HW RAID, my server (ie S5000PAL) is using 1068 or 1064E RAID chipset to allow using RAID, I don't realy know if it is either a good SW or HW RAID but my boss doesn't want me to use Linux RAID instead of the SW RAID provided by the system itself
I have a pair of 1064's in a server at home and I can confirm they are true hardware RAID. They only support RAID 0, 1, or 10 at most though.