If the drive can be accessed by the bios, you can repartition it. Try downloading a boot ‘cd’ like gparted live usb, boot to it, and then use the graphical tools to repartition your drive and write the changes to disk.
If the drive can be accessed by the bios, you can repartition it. Try downloading a boot ‘cd’ like gparted live usb, boot to it, and then use the graphical tools to repartition your drive and write the changes to disk.