Sorry that you did not understand the main reason or this action. It is not about the exact number of ISPs that support a part or the whole of IPv6....
I can not understand point 3. It looks as if you want to post a command to be done. But you forgot the CODE tags and I now I can not understand what...
From this rather bewildering story I deduct that you want to write a new, empty partition table to that disk. When that is correct (and only when you...