You can't overwrite the reserve directly though. You have to write non-zero data to 99% to lock it, then destructively update the last 1% many times to cycle th

You can't overwrite the reserve directly though. You have to write non-zero data to 99% to lock it, then destructively update the last 1% many times to cycle through the reserve. Many disks have a full erase command, which asks the internal controller to do the erase. In general though, I use a hammer.