Run HDD diagnostics -
Start with SeaTools (for DOS) --> SeaTools for DOS | Seagate
Burn ISO to CD with ImgBurn --> The Official ImgBurn Website
ImgBurn - Select "Write image file to disk" -
Boot with SeaTools CD.
If SeaTools comes up OK, run HDD manufacturer's diagnostics --> Hard Drive Diagnostics Tools and Utilities (Storage) - TACKtech Corp.
Regards. . .