Thank you for your comments.
I have a simlar post (and threads) going on over at Tom's Hardware because I wasn't getting any replies here, for awhile but let me ask it here also if I may, as follows:
"Right now I have AHCI in the BIOS enabled, and have 4 SATA disks: no RAID enabled in BIOS, simply running as JBOD. If I first install the Intel RST drivers and the RST RAID management software too (then enable RAID in the BIOS), do the RST RAID drivers allow for JBOD, or require that some RAID be configured (ie. perhaps RAID 1 or 0 on at least two of the disks) ?
I'd be willing to make an incremental backup image of the OS drive, and see if it works if someone could confirm that RST allows JBOD. I understand that RST is generally for RAID, but perhaps it allows for JBOD (like Promise Technology controller firmware and their drivers do)."
Either way, I'll reply any results back here and there to keep the posts complete.