Hi gang! I now have FOUR HD20's that will not mount on my two SE's & my 512Ke. I've tried System 3.1, 6.0.5, & 7.0 with & without the HD20 Boot floppy (I know my models do not require that, but I had to try every option).
What diagnostic tool(s) can I use to troubleshoot these drives? I do not...