CS MkIII doesn't supply term power!
No, but the drive does/might.
Fair question though: are you using ACTIVE terminators? EDIT: Sorry, misread, you are.
Also, try removing the NoNCRPatch from the Deneb, it might actually be causing you trouble. The Cyberstorm itself in it's own menu/bootrom has this option, but first try without.
And indeed, as said before, please do check the SCSI settings in the CS bootmenu!