RAID with stripe array for two 40GB HD

[zzyang0516]

I have got a DFI motherboard which support RAID. I'd like to configure the RAID as stripe to boost the performance. I bought two identical Maxtor HDs with 40 GB each (7200RPM). After I set up the array for performance in BIOS, I was supposed to reboot PC to FDISK two HDs as a single 80GB partition. Since there has been no Window system installed, I could only use DOS Fdisk within boot disk. But, I could not see a single 80 GB. Instead, when I tried to create primary partition, it only had 40BG available for me. There was another 40GB available for extended partition.
Could anybody give me suggestions how to get 80GB as a whole to be able to get striped RAID?
Thanks very much.

[mjc]

zzyang0516

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