The problem with UI is that it doesn't jolt the user. If you want attention, you take them out of the flow. One way to do this is (which I have suggested before) is to make them type into a text box. Something mildly insulting is nice. People will think twice before doing something that they know is going to make them look stupid if they do it. "Of course I just made a full backup" "Yes, this is a bad idea"
If you backup to a USB device, it is always a good idea to verify the data after it is written. An error to a zfs send stream that is recorded to a file would be very bad, as I think it makes the stream invalid. If you zfs receive it into the USB device, at least you can scrub to verify, and if you don't, at least you only lose a little data.
If you backup to a USB device, it is always a good idea to verify the data after it is written. An error to a zfs send stream that is recorded to a file would be very bad, as I think it makes the stream invalid. If you zfs receive it into the USB device, at least you can scrub to verify, and if you don't, at least you only lose a little data.