Hi guys!
What is mod 6F do exactly? Patient is WD20EACS-11BHUB0 with bad sectors in SA, all of the mod 6F copies damaged. Can I clear it or repair it, or must be replaced with a healthy one? Anyone can help me out about this?
Thanks for further!

Controller firmware version = 25.12E
Servo firmware version = 0B.36
Overlay firmware version = 25.13E
Surface format version = C1.007
Read channel firmware version = AA01JJ42
Media count = 3
Physical head count = 6
Used head count = 6
Used head map = 0 1 2 5 6 7
Drive type = Desktop 3.5 Inch