I have WD 800AAJS HDD. I have 3 partitions and in 1st partitions I have windows 7 and in second partition when I open, save, copy or move data in-it the hdd slow-down and have to wait after that a message dialog-box pop-up. My third partition is fine. I have a question will a low-level format repair Hdd bad-sector. I even repair it using WD life-guard diagnostic tool but it even fails there. I can give it to RMA or should I must do a low-level format?
Low level format will only mark bad sectors to not be used. It does nothing to repair them. Even that is only a short term fix as it will most likely have more as time goes on. WD life-guard should do the same thing but I haven't had any success with that either. Backup your data and replace the drive is your best bet.