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 Post subject: ST9750420AS
PostPosted: July 11th, 2017, 13:39 
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Joined: October 21st, 2007, 8:48
Posts: 1631
Hello
The drive in topic spinning normally and shows (busy).
Terminal output:

EarlySpinup Enabled
Rst 0x10M
ASCII Diag mode

F3 T>
LED:00000067 FAddr:003851A2
LED:00000067 FAddr:003851A2
LED:00000067 FAddr:003851A2

Any thoughts?
Thanks in advance.


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 Post subject: Re: ST9750420AS
PostPosted: July 11th, 2017, 19:59 
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Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
I don't think it helps but ...

Code:
0x67 UNDEFINED_INSTRUCTION -- Undefined opcode exception

The error would suggest that the firmware has become "lost".

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 Post subject: Re: ST9750420AS
PostPosted: July 11th, 2017, 22:30 
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Joined: September 29th, 2005, 12:02
Posts: 3561
Location: Chicago
Could be dead heads

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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 5:17 
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Joined: October 24th, 2014, 4:57
Posts: 219
Location: Remote Raid Help on planet Earth
Both fzabkar and Doomer answers are correct and could be simultaneously. I would like to check heads first in order to localize the problem.

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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 5:23 
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Joined: October 21st, 2007, 8:48
Posts: 1631
Thanks for reply fzabkar, Doomer and Martin.
Heads are perfectly working on a donor drive.
I would like to know the read channel points. I will post the PCB pic.
Thanks in advance.


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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 6:11 
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Joined: October 21st, 2007, 8:48
Posts: 1631
With PCB isolated:
EarlySpinup Enabled
Rst 0x10M
ExecuteSpinRequest
LED:00000067 FAddr:00380340
LED:00000067 FAddr:00380340
LED:00000067 FAddr:00380340


Attachments:
100619769 RevA.jpg
100619769 RevA.jpg [ 2.86 MiB | Viewed 12188 times ]
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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 6:47 
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Joined: October 24th, 2014, 4:57
Posts: 219
Location: Remote Raid Help on planet Earth
Here it is.


Attachments:
Points.jpg
Points.jpg [ 479.16 KiB | Viewed 12179 times ]

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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 6:50 
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Joined: October 21st, 2007, 8:48
Posts: 1631
Thank you Martin.
With Donor PCB and donor ROM the drive become ready and reach F3.

Is that mean patient ROM corrupted?


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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 7:28 
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Joined: October 21st, 2007, 8:48
Posts: 1631
Here's the backup of the two ROMs (Patient and Donor):


Attachments:
Patient.rar [435.97 KiB]
Downloaded 472 times
Donor.rar [427.3 KiB]
Downloaded 447 times
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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 7:58 
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Joined: October 24th, 2014, 4:57
Posts: 219
Location: Remote Raid Help on planet Earth
It means there is a coruption in SA. Probably, overlay.

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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 15:06 
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Joined: February 9th, 2009, 16:13
Posts: 2520
Location: Ontario, Canada
Does the S/N in the ROM match the S/N on the drive?

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 Post subject: Re: ST9750420AS
PostPosted: July 12th, 2017, 15:46 
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Joined: October 21st, 2007, 8:48
Posts: 1631
lcoughey wrote:
Does the S/N in the ROM match the S/N on the drive?

Yes.


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 Post subject: Re: ST9750420AS
PostPosted: February 15th, 2022, 8:25 
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Joined: May 29th, 2020, 19:31
Posts: 9
Location: Brasil
Could you inform the patient and donor PCB number

Compatible PCBs for this model are 100620560 REV.A 100619769 100610953

if you have these PCBs in good condition in your labs, you could see which terminal output to the PCB connecting the HDD and separate from the HDD if F3 T> stable without restarting and crashing

or

EarlySpinup Enabled
Rst 0x10M
ExecuteSpinRequest
LED:00000067


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