07-19-2012, 12:42 PM 
		
	
	
		Single head or multiple heads damage;
Damaged spindle motor (bearing seizure, breakage or short-circuit of motor phases);
Damaged preamplifier-commutator chip;
Surface scratches and damaged head;
Reading/writing instabilities;
Physical bad sectors
	
	
	
	
Damaged spindle motor (bearing seizure, breakage or short-circuit of motor phases);
Damaged preamplifier-commutator chip;
Surface scratches and damaged head;
Reading/writing instabilities;
Physical bad sectors

 

 
