I sometimes wonder if people purchase PC3000 and begin a DR service with no clue about what to do and simply write at hddguru for step by step support.....
Identification as SABRE can be for a number of reasons. Probably SA cant be reached which is why you see ID from ROM.
Could be SA problem, could be PCB issue, ROM could be damaged / non original, HSA can be bad, spindle motor could be bad....
Basically any situation where SA reading is affected could be cause of this problem.
Proper diagnosis is required.
Would help if you described any symptoms here also.
Alternatively, send to a professional until you have the experience to deal with this yourself...