Is there a way to prioritize which drive controller gets accessed first? My boot drive is on the IDE bus, a secondary drive is on the GVP T-REX-II SCSI bus. T-REX-II will apparently ignore new file systems added to the RDB of drives on it's SCSI bus (unless you can update the ROM). But if the AmigaOS reads the boot drive IDE bus first, then file systems (like PFS3AIO) added to it can be accessible to the GVP SCSI. I think my A4000 is looking the the GVP SCSI first, so any partitions defined with PFS3AIO are not being recognized.
I can get FFS partitions to work above the 4GB barrier on the GVP SCSI as long as direct SCSI is used. For some reason I had trouble this first times I was trying this (with direct scsi), but I started over with defaults and this time it worked (with direct SCSI).
Jaeson
The Amiga will always favour the IDE over SCSI. (caveat, Not sure how the A4000T works).
The best way would set the IDE device as Bootable and make sure there is no Bootable on the SCSI drives.
Remember that the boot priority can also play a part. I.e “0” lowest, “4” highest. “5” is reserved for the Floppy drive, therefore why it will always boot a floppy disk first regardless of HDD installed.