I've had an identical problem with OpenSUSE 11.2 but Mandriva 2010 seems ok. I don't know what Mandriva have done differently, but their live CD detected the SATA drives fine, but neither Ubuntu 9.10 nor OpenSUSE 11.2 did. I managed to get OpenSUSE to see them with noraid boot option and then install it, so I assume you could do the same with Ubuntu? OpenSUSE then broke with an upgrade that made the hard drives invisible again except in failsafe mode.
I've had an identical problem with OpenSUSE 11.2 but Mandriva 2010 seems ok. I don't know what Mandriva have done differently, but their live CD detected the SATA drives fine, but neither Ubuntu 9.10 nor OpenSUSE 11.2 did. I managed to get OpenSUSE to see them with noraid boot option and then install it, so I assume you could do the same with Ubuntu? OpenSUSE then broke with an upgrade that made the hard drives invisible again except in failsafe mode.