keitharmstrong;
the disks are in bay 0,1,3,4,5,6,7 the rest are empty
The slots 0,1,2(empty),and 3 are all on one scsi backplain.
Slots 4, 5, 6, 7 are on another scsi backplain.
So you are saying when you run probe-scsi-all you only see you c0 drives? Do you also see your cdrom come up, it is on another scsi path.
Don't mean to question your knowledge but I have seen people put drives into the additional slots and not have a backplain and scsi card to run them. You need to open the cover and make sure that the scsi cables are running from you scsi card to your backplain that is attached to your drives in slots 4, 5, 6, 7. Also while your looking at the card get the part# if possible.
Also try putting the drive in slot 4 into slot 2 and power on and probe-scsi-all to see if drive is recognized. If it is recognized then the problem has something to do with second backplain and scsi card setup.
Also you could try 1 drive at a time on the second backplain to confirm that 1 of the drives is not scsi bus issues. Generally you would be getting errors if there was such a problem.
Make sure that you are not attaching anything externally to the scsi card that is being used to drive the second backplain, this will cause scsi conflicts and your internal drives will not be seen.
Thanks
CA