A4000T WB disks - what is different?

[Heiroglyph]

I can't get my A4000T's to boot from anything except the original hard drive.  With any other drive (tested working in a 4000D) it just sits there at a black screen.

Can someone please tell me what the magic different files are?

I've unsuccessfully tried using these files from the old HD:
 the 68040, backup and 060 libraries
 the workbench.library

Does anyone have the adfs or floppies? (I'm obviously legal to own them, they are just lost)

I also own OS3.9 if anyone has a solution using that.

The system is an A4000T with the huge Quickpack 060/50.

Thanks

[Heiroglyph]

I really don't think it's the CPU card, it runs fine with the old drive and the SCSI controller is on the motherboard.

Both drives are SCSI and both will show up in the early boot menu if I leave them both connected.

I just wiped out the files on the new drive and duplicated the minimum folders from the old drive to the new and it will boot from it.

I guess I'll have to remove stuff until I figure out the difference.