My advice is don't bother with FDisk.
If you go to your HDD's manufacturers website (from another PC obviously) they usually provide free software to do this sort of thing that you can put on a floppy or CD-ROM.
Maxtor and Seagate certainly do this.
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?