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 Post subject: HTS421280H9AT00 Does not spin
PostPosted: November 7th, 2018, 10:13 
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Joined: May 28th, 2016, 9:16
Posts: 151
Location: Karlsruhe / Germany
Hey Guys,

I have a problem with a HTS421280H9AT00 drive. The drive does not spin, and wasn't recognised at all. The diodes were ok. I got a donor board for the drive, with the donor, the drive started to spin, but - of course - I wasn't able to get the data. So I transferred the flash chip from the patient board to the donor board.

But now the drive does not spin with the donor board with the patient flash on it. But I got a RDY Signal. And I was able to read the ROM with PC3k, so I think that there is something wrong with the firmware.

Does any one have an idea, what I can do? I attached the ROM to this posting.


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ROM.rar [36.65 KiB]
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 Post subject: Re: HTS421280H9AT00 Does not spin
PostPosted: November 7th, 2018, 15:02 
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Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
Doesn't your PCB have a separate NVRAM chip?

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 Post subject: Re: HTS421280H9AT00 Does not spin
PostPosted: November 7th, 2018, 15:15 
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Joined: November 29th, 2006, 10:08
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fzabkar wrote:
Doesn't your PCB have a separate NVRAM chip?


Should have one @ U6

I expect the OP has switched ROM @ U3 only.

If the FW version of the ROM doesn’t match the NVRAM then the drive won’t spin up.

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 Post subject: Re: HTS421280H9AT00 Does not spin
PostPosted: November 7th, 2018, 15:34 
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Joined: May 28th, 2016, 9:16
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Location: Karlsruhe / Germany
pcimage wrote:
I expect the OP has switched ROM @ U3 only.


I just switched the U6.... Okay, so I have to switch the U6....


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 Post subject: Re: HTS421280H9AT00 Does not spin
PostPosted: November 7th, 2018, 19:46 
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Joined: May 28th, 2016, 9:16
Posts: 151
Location: Karlsruhe / Germany
Just for my understanding, the U3 Chip is the NVRam chip and the U6 Chip is the ROM chip, right?

Because I transferred now the U3 Chip, but there was no result. I read the NVRam and ROM before I transferred the second chip. The ROM file was the same, but the NVRam Data changed a little bit. But with the same result, the drive does not spin up.


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NV-RAM.rar [204 Bytes]
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 Post subject: Re: HTS421280H9AT00 Does not spin
PostPosted: November 7th, 2018, 19:55 
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Joined: September 8th, 2009, 18:21
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Can you show us a photo of your PCB?

BTW, your NVRAM dumps are bad. How are you dumping the NVRAM?

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 Post subject: Re: HTS421280H9AT00 Does not spin
PostPosted: November 8th, 2018, 3:04 
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Joined: November 29th, 2006, 10:08
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Location: UK
D_R wrote:
Just for my understanding, the U3 Chip is the NVRam chip and the U6 Chip is the ROM chip, right?

Because I transferred now the U3 Chip, but there was no result. I read the NVRam and ROM before I transferred the second chip. The ROM file was the same, but the NVRam Data changed a little bit. But with the same result, the drive does not spin up.


Read my post, ROM is U3 (the larger chip) :-)

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 Post subject: Re: HTS421280H9AT00 Does not spin
PostPosted: November 8th, 2018, 6:09 
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Joined: November 29th, 2006, 10:08
Posts: 7843
Location: UK
fzabkar wrote:
Can you show us a photo of your PCB?

BTW, your NVRAM dumps are bad. How are you dumping the NVRAM?


Agreed, your NRAM reads are garbage.

Attached is sample NVRAM from this model...

Your ROM version appears to be A70G like this sample NVRAM, so if the NVRAM is corrupt then you'll have to try a "NVRAM search" in a FW tool like PC3000 (or actually the Salvation tool is quite good at this!)


Attachments:
NV-RAM.rar [343 Bytes]
Downloaded 277 times

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