You might want to look at your BIOS settings and see that the drives are correctly ID' d in the bios. If you are using SATA drives you will need to have ide emulation enabled for FreeBSD or OpenBSD. It may also be helpful to post the motherboard model number and the chipset it has ie intel, amd, via sis etc. Via brand chipset do not play well with multiple SATA drives in OpenBSD
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