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 Post subject: Cut bad head
PostPosted: April 24th, 2017, 11:40 
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Joined: April 24th, 2017, 11:37
Posts: 3
Location: Costa Rica
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.


Attachments:
FILE_9_32A_0.rar [436.52 KiB]
Downloaded 65 times
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 Post subject: Re: Cut bad head
PostPosted: April 25th, 2017, 16:02 
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Joined: September 8th, 2009, 18:21
Posts: 9693
Location: Australia
Sysfile 32A is the ROM.

Code:
ID   address range     size
---------------------------
02   000038 - 061637  61600   code
04   061638 - 061847    210   Controller Adaptive Parameters (CAP)
06   061848 - 069C57   8410   Read Adaptive Parameters (RAP)
03   069C58 - 07CC57  13000   code
0B   07CC58 - 07DD57   1100
05   07DD58 - 07FD6F   2018   Servo Adaptive Parameters (SAP)
0E   07FD70 - 07FFFF    290
00   080000         end of ROM modules

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 Post subject: Re: Cut bad head
PostPosted: April 30th, 2017, 15:43 
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Joined: April 24th, 2017, 11:37
Posts: 3
Location: Costa Rica
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.


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 Post subject: Re: Cut bad head
PostPosted: April 30th, 2017, 16:58 
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Joined: September 8th, 2009, 18:21
Posts: 9693
Location: Australia
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.

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 Post subject: Re: Cut bad head
PostPosted: May 1st, 2017, 18:03 
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Joined: April 24th, 2017, 11:37
Posts: 3
Location: Costa Rica
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.


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 Post subject: Re: Cut bad head
PostPosted: May 7th, 2017, 19:00 
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Joined: December 19th, 2006, 8:49
Posts: 8122
Location: Portugal
Doiscussion moved here - http://www.hddoracle.com/viewtopic.php?f=2&t=2037

:D :D :D

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