Unfortunately, you "went and did something" before asking us first
At this point, it looks like you obliterated, not only the boot sector, but a large swath of the disk. Of course, if your intent
was to "quickly wipe" the drive prior to a clean
installation on that drive, this would actually be a pretty reasonable way to go about doing that, because it would wipe the file-management data structures without taking the time to actually zero all of the blocks on the disk.
The only thing that you can reasonably do now is to reformat the drive, then install the operating system (and everything
else ...) onto this now-virgin media.