High capacity SATA drive on 1st gen RAID possible?

Hello everyone,

I currently have a MSI GNB Max-FISR mobo with
Serial ATA Interface of Promise 20376 controllers 2 Serial ATA ports in 150 MB/s operation mode and 1 Ultra DMA port.
My current setup is RAID 1 with 2 SATA 80GB drives (Seagate)---and I am running out of room.

My question is: can I buy the new 200-400GB SATA drives and use it on my mobo that "supports 1st generation serial ATA data rates of 150 MB/s" according to the user guide?

I called MSI tech support and the reply is along the lines of "we've only tested the mobo for 160GB but not higher but you can try it"?
(I don't want to be a SATA guinea pig.)

Has anyone used a higher capacity SATA drive on a lower capacity RAID controller?
I would like to buy 2 300GB or 400GB SATA drive$ and still use RAID 1's mirroring capabilities.

Greatly would appreciate the advice.
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  1. I think you will be able to see the whole drive if you install windows off a disc that already has sp2 on it.

    <A HREF="http://www.folken.net/myrig.htm" target="_new">My precious...</A>
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