Try to add it to WinUAE, in the add harddrive settings and use a workbench.adf to boot up, also go to Aminet, and get IDEfix97. Have it unzipped and set up on some place on your Windows drive. Make shure you add that to you winUAE harddrive settings.
After WinUAE loads up Workbench, use the find device in IDEfix97. It should find it and let you partition, and format the drive.