Some  one  may  have  this  situation:  when  load  from  HDD  or  do  some  operation  with  modules,  the
status would show “5a”, and the program may hang. As the follow picture:

The reason is some of the modules or the PCB has problem, it may cause the program stop and hang.    

How to solve it and How to use Hdd repair tools:

Load  the  HDD from  file  and  check  the  button  “by  single  sector”  (SA access  mode)  that  the  program
will read the modules by sector, which skips the “5a” problem:

Then we can check the problem in modules, as the follow, we can see the RSVD module was broken;

users need to find a donor module or save a native one from the SA-C, and then use it to replace the
damaged RSVD module. The drive would be ok.