Explanation of Hitachi-IBM calibration NV-RAM entrance error

       MRT Hitachi repair tools. Click the menu of “Calibrate NV-RAM entrance”, firstly it will pop up directory settings dialog box, require users to set the current work directory. After finished, it will pop up parameter setting dialog box of “Calibrate NV-RAM entrance”, show as picture 2.2-6.

        Dialog box is divided into follow parts: “setting model”, “setting range”, “setting time”, “setting directory”, among them “setting model” is only effective for “SA entrance”. “Setting directory” is used to preserve current NV-RAM information, so that it can recovery NV-RAM when calibration fail.

Explanation of Hitachi-IBM calibration NV-RAM entrance error

                  Picture 2.2-6 calibrate NV-RAM entrance

1. SA entrance
“Calibrate NV-RAM” is used to search NV-RAM entrance and adjust it to correct figure. “Setting model” includes “normal model” and “legacy model”, the former deal with all HDDs by the same method, it has no reset process when HDD busy and faster. The latter is MRT specific functions for the hard disk for special treatment, it has reset process when HDD busy and slower. If it can’t calibration by common model, you can try legacy model. If users checked “whether write NV-RAM”, after calibration entrance address successful, the program will write the correct result in NV-RAM directly and identified HDD again. Execute result shows in the log.

1. Summary of SA entrance calibration errors
The follow reasons lead to SA entrance calibration errors:
1) NV-RAM or RAM read failure
Right now it will show follow information in log page:
Read NV-RAM………………………………………..Error
or
Read RAM……………………………………………..Error
This error indicates NV-RAM or RAM unreadable; it may due to HDD cipher incorrect or problem of HDD PCB board, if the former, please select correct HDD family; if the latter, please make sure whether PCB board is connected normal or RAM chip is normal.
Or it will show follow information in log page:
Read NV-RAM………………………………………..OK
or
Read RAM……………………………………………..OK
It indicates NV-RAM or RAM read normally.
2) Key word search failure
Right now it will show follow information in log page:
Searching for SA Tops table image in RAM………………………………………..Error
This error indicates RAM read normal but the information is incorrect, it may because ROM information incorrect or ROM boot incorrect, it leads to information doesn’t load into RAM correctly.
Or it will show follow information in log page:
Searching for SA Tops table image in RAM………………………………………..OK
The normal information indicates ROM has been led it to searched matching information in RAM.
3) Preserve NV-RAM file failure
Right now it will show follow information in log page:
Saveing NV-RAM to file……………………………………………………………….. Error
This error indicates backup NV-RAM error, it may because build work directory error, the folder forbade to be write in, and work directory is locked by antivirus software or other programs, system problem and so on.
Saveing NV-RAM to file………………………………………………………………..OK
It indicates NV-RAM backup normally.
4) Write RAM error
Right now it will show follow information in log page:
Write RAM……………………………………………..Error
This error indicates RAM can’t be write in, it may because the problem of HDD PCB board, make sure whether PCB board is connected normally or RAM chip is abnormal.
Or it will show follow information in log page:
Write RAM……………………………………………..OK
5) Unknown error
It will show follow information in log page:
UnKnow error…………………………………………. Termination operation!
HDD cannot ready!
This error indicates HDD has unknown error in the process of hard reset, so HDD couldn’t ready and busy all the time. Due to HDD which user needs to deal with have different actual situations, the read/write time and ready time are different from each other, user can setting appropriate timeout in “calibrate NV-RAM entrance” parameter setting dialog box; or setting appropriate time in “tools->ATA timeout setting”.
2. Summary
Due to it has great different between disks which user actual deal with; it has different reasons of SA entrance calibration fail. In actual situation, most users need to calibrate SA entrance after change PCB board; it will change HDD’s servo system and ROM adapter information after change PCB board, these changes may lead to SA entrance calibration fail. If users want to play its complete functions, they need to setting parameter correctly and change board (write ROM or NV-RAM) according to actual situation and combine repair experience.
2. User Data Adds
“User Data Adds” is used to search user data area entrance and adjust it to correct figure, program adjusts user data area entrance in NV-RAM, after revise NV-RAM, it will take effect when HDD power off reset, so this process will repeat revise NV-RAM and execute power off reset to HDD until it could visit HDD sectors normally. Please be careful to use this function when user couldn’t make sure HDD head performance or disk condition.
1) Summary of user data adds entrance calibration error
a. NV-RAM read fail
Right now it will show follow information in log page:
Read NV-RAM………………………………………..Error
This error indicates NV-RAM is unreadable; it may due to HDD cipher incorrect or the problem of HDD PCB board. If it is the former, please choose the correct HDD family, if it is the latter, please make sure whether PCB board is connected normally or whether RAM chip is normal.
Or it will show follow information in log page:
Read NV-RAM………………………………………..OK
It indicates NV-RAM or RAM read normally
b. Write NV-RAM error
Right now it will show follow information in log page:
Write NV-RAM……………………………………………..Error
This error indicates NV-RAM can’t be write in, it may because the problem of HDD PCB board, make sure whether PCB board is connected normally or RAM chip is abnormal.
Or it will show follow information in log page:
Write NV-RAM……………………………………………..OK
c. HDD couldn’t ready in the specified timeout period
Right now it will show follow information in log page:
HDD cannot ready!
This error indicates HDD couldn’t ready in the specified timeout period in the process of power off reset and has been in a state of Busy light. Due to HDD which user needs to deal with have different actual situations, the read/write time and ready time are different from each other, user can setting appropriate timeout in “calibrate NV-RAM entrance” parameter setting dialog box; or setting appropriate time in “tools->ATA timeout setting”.
 
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