My setup is composed of a hardware raid 5 using 4 ide 200g drives connected with a highpoint RocketRaid 454.
I also have a 2 sata disk raid0 on the motherboard controller.
copying files to the raid 5 is dreadfully slow, around 0.8mb/sec.
at first i thought it may be the x64 drivers for windows xp pro x64, but i get the same speeds with 32-bit win xp.
the same thing happens when i create a hardware raid 0 and a software raid 0 with the drives on that card.
I get no errors, and i'm out of things to try/check before i RMA the card.
(the hard drives are fine if used independantly)