My advice when installing a new scsi drive in any Amiga is to leave your original drive in just in case. Setup goes something like this (more or less): Set the new drive to a different scsi ID and make sure the chain is terminated properly depending upon where the new drive is (an active terminator is a good idea with more than one drive in any case). Next, boot with your old drive and open HDToolbox to see if it recognizes the new drive. Now, setup a boot partition and other partitions on the new drive, setting the boot priority of the bootable partition to a number greater than your old drive but less than the floppy df0: (which is probably at 5). Save the changes and reboot holding down both mouse buttons. In the startup menu you should be able select your old drive to boot from again. Once it boots, you then format the new drive's partitions and install workbench on your new drive's bootable partition. Reboot and voila, your working off your new drive. The old drive will also be there and once you're confident of the compatibility of the new drive you can take it out, making sure of course that if it was the last device in the scsi chain you now terminate the new last device.
