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 Post subject: ST9750420AS
PostPosted: July 11th, 2017, 13:39 
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Joined: October 21st, 2007, 8:48
Posts: 1062
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: 9801
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: 3140
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: 212
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: 1062
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: 1062
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 978 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: 212
Location: Remote Raid Help on planet Earth
Here it is.


Attachments:
Points.jpg
Points.jpg [ 479.16 KiB | Viewed 969 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: 1062
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: 1062
Here's the backup of the two ROMs (Patient and Donor):


Attachments:
Patient.rar [435.97 KiB]
Downloaded 43 times
Donor.rar [427.3 KiB]
Downloaded 37 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: 212
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: 1936
Location: Ontario, Canada
Does the S/N in the ROM match the S/N on the drive?

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RAID Data Recovery


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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: 1062
lcoughey wrote:
Does the S/N in the ROM match the S/N on the drive?

Yes.


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