This data recovery technical document is one case study introducing how DFL-WDII hdd repair tool is used to repair damaged WD hdds which are working very slow with many regular bad sectors without clicking noises.
For this kind of problem, we usually consider it’s caused by the ID module or translator problem.
The hdd is one WD SATA 1TB hdd whose model is WD10EVDS-63U880. Luckily the hdd can reach readiness status.
The response was very slow and the hdd was detected after some time.