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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 3rd, 2017, 15:55 
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fzabkar wrote:
Perhaps one could collate the adaptive data from several ROMs and then determine average values for each set. It shouldn't be too difficult to write a tool to automate this process.

Unfortunately averaging values does not help, because the exact values are usually very different from average values.

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 3rd, 2017, 16:05 
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Perhaps it might be instructive to work in reverse. That is, take a working drive and adjust the adaptives (for head 0), one at a time, in each direction until SA access is lost. This would provide some insight into the sensitivity of each value.

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 3rd, 2017, 16:33 
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Thank you Mr. Frank for your efforts.
A friend of mine (member in this forum) confirmed that the ROM version of my defective drive is 00030078.
So, I will focus on this ver. and collect as much as I can and compare mod. 4F.

Any suggestions would be highly appreciated.


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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 3rd, 2017, 17:23 
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I think that my second data set is probably better arranged as follows:

Code:
CB07 20D3 28FF 0DFD 2400 4300 3600 D6FF 1200 E5FF
0FFE 57D9 3F00 15FC F8FF 2800 1E00 DCFF ECFF 2700
9507 21DE 0AFF 80FC 0F00 5400 ACFF 0A00 ECFF EAFF
CAFA 89DC 2400 CAFB FEFF 1000 ECFF EBFF 1700 0F00
0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
0000 0000 0000 0000 0000 0000 0000 0000 0000 0000

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 3rd, 2017, 19:05 
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fzabkar wrote:
Perhaps it might be instructive to work in reverse. That is, take a working drive and adjust the adaptives (for head 0), one at a time, in each direction until SA access is lost. This would provide some insight into the sensitivity of each value.

the sensitivity of needed values is about 0x10000, unfortunately the values work as pairs, so both values need to be correct at the same time and their rule of changing is not linear.
That gives you roughly 67 mln. combinations per head

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 3:38 
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Hi,

I already have recovered such case and developed a reliable solution (not just blind trial and error).
PM sent to OP.

pepe

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 4:30 
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Would it help to transfer a donor PCB and headstack the patient?

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 4:37 
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unknown wrote:
....
A friend of mine (member in this forum) confirmed that the ROM version of my defective drive is 00030078.
....


It is very interesting for me how he had find out a fw version without original ROM and SA. With some luck it can be found out approximately by serial number, but even on factory the drives have reconfiguration frequently, so it is some mistery for me how to do this with 100% garanty.

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 6:01 
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Martin wrote:
so it is some mistery for me how to do this with 100% garanty.

The principle is similar to the selection of NVRAM on Hitachi


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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 6:13 
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Moltke wrote:
Martin wrote:
so it is some mistery for me how to do this with 100% garanty.

The principle is similar to the selection of NVRAM on Hitachi


I'm not talking about how to find SA, I meant how to know fw version without ROM and SA.

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 6:32 
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Martin wrote:
I'm not talking about how to find SA, I meant how to know fw version without ROM and SA.

View in mod 90h


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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 7:18 
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Excuse me, but how do you access mod 90 without accessing the SA?

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 8:06 
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To do that, you need to reselect ( in 4Fh) and verify access to SA (90h)


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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 8:13 
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Moltke wrote:
To do that, you need to reselect ( in 4Fh) [Brute force machine ] and verify access to SA (90h)


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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 11:48 
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Moltke wrote:
Moltke wrote:
To do that, you need to reselect ( in 4Fh) [Brute force machine ] and verify access to SA (90h)

If you reselect a 4F, you can get access to SA.
I'm talking about this
Quote:
I have tried several ROM's and LDR's but no luck. No access to SA to determine the correct version of original ROM.

and later
Quote:
A friend of mine (member in this forum) confirmed that the ROM version of my defective drive is 00030078.


No ROM. No SA. But he find out a fw version.
This is interesting. Or there is something wrong...

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 12:06 
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Martin wrote:

No ROM. No SA. But he find out a fw version.
This is interesting. Or there is something wrong...

Insider from WD ?
The information from the of 80xxh is kept by the manufacturer somewhere.
Therefore, it is likely that can search by serial number and DIT (in internal databases)


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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 17:09 
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AFAICT Firebird 4F modules differ from earlier 4F modules in that they have an additional adaptive section at the end. The data (little-endian) appear to have large drive-to-drive variations but relatively little head-to-head variation within each drive.

WD10JMVW-11S5XS0, 4F, ver 0003001U, 4 heads

Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

000001F0                    00 00 90 AA 00 00 98 33 2E 0A
00000200  7C D8 26 0A DC 49 27 0A 09 1F 24 0A 00 00 00 00
00000210  00 00 00 00 61 3B 91 FF 72 A3 CE FF 46 8F CD FF
00000220  B3 FE D3 FF 00 00 00 00 00 00 00 00

head 0   head 1   head 2   head 3
98332E0A 7CD8260A DC49270A 091F240A 00000000 00000000  group #1
613B91FF 72A3CEFF 468FCDFF B3FED3FF 00000000 00000000  group #2

WD10JMVW-11S5XS0, 4F, ver 00030078, 4 heads

Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

000001F0                    00 00 90 AA 00 00 04 2B 4A FC
00000200  37 2B 12 FC AE 8E 17 FC E3 44 14 FC 00 00 00 00
00000210  00 00 00 00 A1 C8 86 09 CB D8 5F 09 AC 32 6F 09
00000220  26 E8 69 09 00 00 00 00 00 00 00 00

head 0   head 1   head 2   head 3
042B4AFC 372B12FC AE8E17FC E34414FC 00000000 00000000  group #1
A1C88609 CBD85F09 AC326F09 26E86909 00000000 00000000  group #2

WD10JMVW-11AJGS1, 4F, ver 0002000C, 4 heads

Code:
2C9DD20B 127CC70B 860AC80B 6E08C30B
0C389AFD 598E58FD A0565BFD 72905DFD

In the above examples the adaptive data appear to be clustered as follows (big-endian):

Code:
group #1  group #2   model            version
----------------------------------------------
FFxxxxxx  01xxxxxx  WD10JPVT-75A1YT0  00030038
0Axxxxxx  FFxxxxxx  WD10JMVW-11S5XS0  0003001U
FCxxxxxx  09xxxxxx  WD10JMVW-11S5XS0  00030078
0Bxxxxxx  FDxxxxxx  WD10JMVW-11AJGS1  0002000C

There appears to be no consistent relationship between the first group and the second group.

FWIW, here is the same section from a different model:

WD1001X06X-00SJVT0, 4F, ver 0002000C, 4 heads

Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

000001B0                                            00 00
000001C0  90 AA 00 00 00 00 A0 01 00 00 E0 01 00 00 E0 01
000001D0  00 00 D0 01 00 00 50 06 00 00 38 06 00 00 30 06
000001E0  00 00 38 06 00 00 00 00 00 00 00 00 00 00 00 00
000001F0  00 00 00 00

head 0   head 1   head 2   head 3
0000A001 0000E001 0000E001 0000D001  group #1
00005006 00003806 00003006 00003806  group #2

The resolution appears to be 0x80000. This seems extremely coarse when compared with the Firebird models. The new drive has a dual actuator with a piezo element for fine positioning. Could this be a clue? Could these be runout parameters?

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 18:18 
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Quote:
they have an additional adaptive section at the end


Actually, this is the most important section.

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 18:40 
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To the OP, is there a chip at U7 near the spindle motor pins (J6)?

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 Post subject: Re: WD5000BMVW-11S5XS0
PostPosted: July 4th, 2017, 19:13 
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I will check it tomorrow when i get to the office if it exist or no and post the result.
Thank you Mr. Frank.


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