How were you able to partition the drive if HDtoolbox kept reporting "no slot"? That suggests it cannot see the controller.
The CIAs have nothing to do with the hard drive controller, which is a seperate board in the A2000. It has no motherboard IDE or SCSI that I know of.
I'd start by looking at your SCSI/IDE controller and hard drive.
Do you have OS 3.1 in ROM? If not, it's usually not a good idea to use a workbench or version higher than the OS version.
You might need to give us a bit more information.
