Problem with slowing older drive

I replaced the both cables and loaded MHDD through DOS. I could not run the surface scan because it said, “drive not ready.” I looked on their forum, but the I couldn’t understand the troubleshooting.

I ran the WD lifeguard diagnostic tool and started to zero-fill the disk, but it show 110 hours remaining and after an hour or so, the progress bar had not moved at all, so I aborted. I ran a quick scan with no errors in about 6 minutes, and then an extended scan in about 77 minutes also with no errors.

The disk has served me faithfully, but I think it is time to throw it away. Thank you for your help.