Explanations of Hitachi-IBM kill head error

                                                                                                   Explanations of Hitachi-IBM kill head error

  Click “kill head” menu, firstly it will pop up dialog box of working directory set up and require users to set up the current working directory. After finished, it will pop up “kill head” parameter set up dialog box. As picture 1 show:
Dialog divided into the follow parts: “select folder”, “set up model”, “current used head”. Among which “backup to follow folders” is used to backup key module and preserve created module and “set up module” is used to change SPT exchange factors.
                            Explanations of Hitachi-IBM kill head error
                                                       Picture 1 kill head
       For Hitachi-IBM HDDs, one of heads breakdown, HDD will has many bad tracks. These bad tracks are regular, the general is normal region and the error regions appear alternately. The size of the region is depends on SPT of every HDD.
“Kill head” is used to kill bad head, the former deal with HDD by unified method; it has no reset process when HDD busy and it is faster. The latter is MRT specific functions for the hard disk for special treatment; it has reset process when HDD busy and it is 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 kill head error
The follow causes lead to kill head error
a. NV-RAM read fail
Right now it will show follow information in Log:
Read NV-RAM………………………………………..Error
This error shows NV-RAM or RAM is unreadable; it may because HDD key is incorrect or HDD PCB board has a problem. If it is the former, please select the correct HDD family. If it is the later, please make sure whether the PCB board is linked normal or not.
Or it will show the follow information in Log:
Read NV-RAM………………………………………..OK
It indicates NV-RAM read normal
b. Module read fail
Kill head function needs to revise CHNL, ZONE and CNS1 modules. If fail, it may show the follow information in Log:
Read CHNL(0) module………………………………………..Error
or
Read ZONE(0) module………………………………………..Error
or
Read CNS1(0) module………………………………………..Error
or it may show the follow information in Log: 
Read CHNL(0) module………………………………………..OK
or
Read ZONE(0) module………………………………………..OK
or
Read CNS1(0) module………………………………………..OK
It indicates key module can read normally
c. Preserve NV-RAM file fail
Right now it shows follow information in Log:
 
Saveing NV-RAM to file……………………………………………………………….. Error
This error indicates backup NV-RAM error, it may because create working directory error, the folder forbade to be wrote, locking the working directory by antivirus software or other programs, system problems and so on.
Or it will show the follow information in Log:
Saveing NV-RAM to file………………………………………………………………..OK
It indicates NV-RAM backup normally.
c. Search offset address of search data adapter in CNHL
If it error, it will show the follow information in Log:
Search address in CHNL……………………………………………..Error
This error indicates it doesn’t search offset address of search data adapter in CHNL, it is usually due to HDD couldn’t support this series of kill head.
Or it will show follow information in Log:
Search address in CHNL……………………………………………..OK
d. Create key module
If it error, it will show follow information in Log:
Generate CHNL module…………………………………………. Error!
or
Generate ZONE module…………………………………………. Error!
or
Generate CNS1 module…………………………………………. Error!
Usually program couldn’t show this error, if it shows, that means buffer is accidentally overwritten, or it shows follow information in Log:
Generate CHNL module…………………………………………. OK!
 
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