Before performing these steps, please ensure that you have upgraded the virtual machine's hardware by going to:
For Fusion 3.x and earlier, Virtual Machine > Upgrade Virtual Machine from the menu bar.
For Fusion 4.x and later, Settings > Compatibility. Set it to the compatibility level of the version of Fusion that you are using.
Before making this change, ensure that you have installed an appropriate driver for the new controller in the guest operating system. This usually happens as part of an operating system installation. You can also add another virtual disk, on an additional virtual SCSI controller, to boot the guest operating system with its current controller. When the driver is installed, and the new disk detected, the additional disk can be removed.
To change the SCSI controller type from BusLogic to LSI Logic or from LSI Logic to BusLogic: