Hello:

I have HDD ST31000528AS-6VP470QA FW: CC38 when i test zones show:

Cyl Head MnZn Throughput
Hd Zn Skew Skew Skew (MB/s)
0 00 38 6E 69 133.432
0 01 38 6E 69 129.522
0 02 38 6E 69 127.132
0 03 38 6E 69 123.632
0 04 38 6E 69 121.088
0 05 38 6E 69 116.420
0 06 38 6E 69 112.003
0 07 38 6E 69 107.214
0 08 38 6E 69 102.908
0 09 38 6E 69 98.384
0 0A 38 6E 69 94.604
0 0B 38 6E 69 90.815
0 0C 38 6E 69 85.144
0 0D 38 6E 69 80.708
0 0E 38 6E 69 76.930
0 0F 38 6E 69 73.475
0 10 38 6E 69 70.654
1 00 38 6E 69 70.101
1 01 38 6E 69 128.686
1 02 38 6E 69 124.898
1 03 38 6E 69 122.455
1 04 38 6E 69 118.320
1 05 38 6E 69 116.436
1 06 38 6E 69 111.029
1 07 38 6E 69 105.990
1 08 38 6E 69 102.183
1 09 38 6E 69 98.401
1 0A 38 6E 69 93.353
1 0B 38 6E 69 89.155
1 0C 38 6E 69 83.848
1 0D 38 6E 69 79.064
1 0E 38 6E 69 75.689
1 0F 38 6E 69 71.908
1 10 38 6E 69 70.646
2 00 38 6E 69 137.169
2 01 38 6E 69 133.171
2 02 38 6E 69 132.071
2 03 38 6E 69 127.398
2 04 38 6E 69 122.977
2 05 38 6E 69 119.592
2 06 38 6E 69 114.002
2 07 38 6E 69 110.059
2 08 38 6E 69 105.959
2 09 38 6E 69 100.911
2 0A 38 6E 69 98.385
2 0B 38 6E 69 93.345
2 0C 38 6E 69 87.770
2 0D 38 6E 69 83.936
2 0E 38 6E 69 78.207
2 0F 38 6E 69 75.683
2 10 38 6E 69 73.162
3 00 38 6E 69 0.000 write error read error
3 01 38 6E 69 0.000 read error
3 02 38 6E 69 0.000 read error
3 03 38 6E 69 0.000 read error
3 04 38 6E 69 0.000 read error
3 05 38 6E 69 0.000 read error
3 06 38 6E 69 0.000 read error
3 07 38 6E 69 0.000 read error
3 08 38 6E 69 0.000 read error
3 09 38 6E 69 0.000 read error
3 0A 38 6E 69 0.000 read error
3 0B 38 6E 69 0.000 read error
3 0C 38 6E 69 0.000 read error
3 0D 38 6E 69 0.000 read error
3 0E 38 6E 69 0.000 read error
3 0F 38 6E 69 0.000 read error
3 10 38 6E 69 0.000 read error

I need help to cut bad head 03, i have a copy of sysfiles 1b,32a, 35, 28, 01, 208, etc.
I read that cut head 03 is possible by editing the sysfile 32a. I upload the sysfile 32a
of this HDD.

Thank you in advanced.

Sysfile 32A is the ROM.

_________________
A backup a day keeps DR away.

fzabkar thank you for answer, how can i locate headmap in ROM module
and modified it to disable head 03, i think it is an importat step to
cut head 03 in this HDD.

I can't answer your question. However, if I were researching this question on a first principles basis, I would start by examining the adaptive modules (RAP/CAP/SAP) via appropriate terminal commands and analyse the structure of the outputs.

Another way to research this question would be to compare the adaptives in 3-head and 4-head versions of the same firmware (or 1 and 2 head, or 5 and 6 head). An even better comparison would be between refurbished drives where one head has been cut at the factory. One could apply this same approach to other brands.

Of course I'm assuming that you don't have commercial tools to do the head cut for you.

_________________
A backup a day keeps DR away.

Thank you for answer: I do not have commercial tool to work Seagate F3, that is why i am trying to cut head in manual way. I agree with you the best way will be have an refurbish HDD to compare or have a ROM module of an HDD which have the head cut, but i do not have any ROM module of HDD with head cut for the moment, i thank if someone upload a ROM module of HDD after and before cut a head this will be the ideal case for this research.
I will post here any progress. Thank for your help.

Doiscussion moved here - http://www.hddoracle.com/viewtopic.php?f=2&t=2037

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