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 Post subject: Mysterious case. WD30EZRS-00J99B0 won't spin up.
PostPosted: February 9th, 2019, 22:42 
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Joined: September 15th, 2017, 4:48
Posts: 36
Location: Ukraine, Lugansk city
WD30EZRS-00J99B0 Dragon 57.7MK, Pcb 771698-002 Rev A. won't spin up, detects in safe mode in WDMarvel. At first I thought it might have been either the PCB, ROM or motor problem. So I swapped the PCB to compatible one (taken from Sadle G6) without writing the native ROM on it just to make sure the motor is ok. The drive DID spin up without any strange noise and tried to calibrate (unsuccessfully, of course).

So I read the native ROM dump using WDMarvel and wrote it on donor PCB. The drive didn't spin up after powering up. Then I thought the native ROM dump might have been corrupted and examined it with Fzabkar's Wdromv11 tool. The tool didn't found any corruption! Then I started to write different Dragon ROM versions (Pcb 771698-002 compatible versions and not) on donor PCB. Guess what? No spinning... But if I write Sadle G6 ROM - it does spin up!

I am at loss to understand. Somebody said in this forum that some WD drives won't spin up if they detect a bad head but I can hardly imagine the self-diagnostic mechanism which would determine a bad head without even trying to read servo...


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 Post subject: Re: Mysterious case. WD30EZRS-00J99B0 won't spin up.
PostPosted: February 10th, 2019, 4:27 
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Joined: March 7th, 2009, 12:43
Posts: 915
Location: Angel Data Recovery
manager_lg wrote:
WD30EZRS-00J99B0 Dragon 57.7MK, Pcb 771698-002 Rev A. won't spin up, detects in safe mode in WDMarvel. At first I thought it might have been either the PCB, ROM or motor problem. So I swapped the PCB to compatible one (taken from Sadle G6) without writing the native ROM on it just to make sure the motor is ok. The drive DID spin up without any strange noise and tried to calibrate (unsuccessfully, of course).

So I read the native ROM dump using WDMarvel and wrote it on donor PCB. The drive didn't spin up after powering up. Then I thought the native ROM dump might have been corrupted and examined it with Fzabkar's Wdromv11 tool. The tool didn't found any corruption! Then I started to write different Dragon ROM versions (Pcb 771698-002 compatible versions and not) on donor PCB. Guess what? No spinning... But if I write Sadle G6 ROM - it does spin up!

I am at loss to understand. Somebody said in this forum that some WD drives won't spin up if they detect a bad head but I can hardly imagine the self-diagnostic mechanism which would determine a bad head without even trying to read servo...


What will happen if you issue spin_UP command to the drive?

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 Post subject: Re: Mysterious case. WD30EZRS-00J99B0 won't spin up.
PostPosted: February 10th, 2019, 8:35 
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Joined: September 15th, 2017, 4:48
Posts: 36
Location: Ukraine, Lugansk city
DR-Kiev wrote:
What will happen if you issue spin_UP command to the drive?


Thnx for the reply bro. Nothing happens.

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 Post subject: Re: Mysterious case. WD30EZRS-00J99B0 won't spin up.
PostPosted: February 10th, 2019, 13:56 
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Joined: September 15th, 2017, 4:48
Posts: 36
Location: Ukraine, Lugansk city
I can now confirm that Dragon won't spin up if it detects a bad head (heads). After disabling 1st and 2nd heads the drive spun up and I managed to run ARCO sequence. I forgot to mention, this is not a data recovery case.

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 Post subject: Re: Mysterious case. WD30EZRS-00J99B0 won't spin up.
PostPosted: February 10th, 2019, 18:11 
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Joined: December 19th, 2006, 8:49
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Location: Portugal
Cool !!!!

:D

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 Post subject: Re: Mysterious case. WD30EZRS-00J99B0 won't spin up.
PostPosted: February 10th, 2019, 20:58 
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Joined: September 8th, 2009, 18:21
Posts: 11819
Location: Australia
manager_lg wrote:
Somebody said in this forum that some WD drives won't spin up if they detect a bad head but I can hardly imagine the self-diagnostic mechanism which would determine a bad head without even trying to read servo...

The firmware could test the head resistance without spinning up the drive. Seagate's terminal has a command for doing just that.

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 Post subject: Re: Mysterious case. WD30EZRS-00J99B0 won't spin up.
PostPosted: February 12th, 2019, 11:03 
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Joined: April 10th, 2007, 9:53
Posts: 329
I've had 4 of these issues over the last year. Definitely the heads in my experience.


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 Post subject: Re: Mysterious case. WD30EZRS-00J99B0 won't spin up.
PostPosted: February 13th, 2019, 13:55 
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Joined: June 8th, 2006, 19:44
Posts: 2997
Location: Atlanta, GA
Loaded head(s) from crash / contamination.

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