I used to work with OMNI S3 long time ago,when it was a product of GTE/ATEA. I still remember some things.... Which version of FMS board do you have?
FB-17220-B0A
FB-17220-C0A
FB-17220-D0A
(FMS board is Hard disc controller, there is flat cable between the disc and FMS)
What is your software version?
You can find it by typing:
GR CD0 FFF0 FFFF