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 Post subject: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: June 23rd, 2021, 8:08 
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Joined: December 14th, 2020, 11:51
Posts: 50
Location: France
Hello,

Has anyone work on those Surface m.2 before ? I am looking for test point/safe mode. I've checked all resistor and coil, nothing bad. There's on short but I beleive it's fuse.

Thanks
Spot


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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: June 23rd, 2021, 18:58 
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Joined: September 8th, 2009, 18:21
Posts: 15440
Location: Australia
You may be able to provoke safe mode by disabling the 2.5V supply. You could do this by grounding the Enable pin, assuming it is connected to a pullup resistor.

https://www.ti.com/lit/ds/symlink/tlv62085.pdf

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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: June 24th, 2021, 4:37 
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Joined: December 14th, 2020, 11:51
Posts: 50
Location: France
Thank you. I've tried to GND before the pull up, no luck.


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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: July 1st, 2021, 9:44 
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Joined: December 14th, 2020, 11:51
Posts: 50
Location: France
ok, I desoldered the chip and could read it.


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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: July 2nd, 2021, 17:52 
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Joined: August 18th, 2010, 17:35
Posts: 3636
Location: Massachusetts, USA
Spotmen wrote:
ok, I desoldered the chip and could read it.

Does it have any encryption when reading the chip directly?

I received one the other day and the customer was paranoid about us making any kind of physical modifications. So, we gave it back to him.

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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: July 6th, 2021, 5:58 
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Joined: May 12th, 2015, 5:37
Posts: 30
Location: Russia
It is a PCI-E drive, but you are trying to read it over SATA.


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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: July 6th, 2021, 15:56 
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Joined: September 8th, 2009, 18:21
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Location: Australia
Agrail wrote:
It is a PCI-E drive, but you are trying to read it over SATA.

Doh, you're right. It should have been obvious from the photo, but here is added confirmation:

https://www.techpowerup.com/review/sk-hynix-gold-p31-1-tb/

Quote:
The controller is an in-house design by Hynix called "ACNT038," or "Cepheus."
Quote:
Interface: PCIe Gen 3 x4, NVMe 1.3

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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: July 10th, 2021, 7:16 
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Joined: December 14th, 2020, 11:51
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Location: France
labtech wrote:
Spotmen wrote:
ok, I desoldered the chip and could read it.

Does it have any encryption when reading the chip directly?

I received one the other day and the customer was paranoid about us making any kind of physical modifications. So, we gave it back to him.

No, you see NTFS with Bitlocker.


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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: July 10th, 2021, 7:50 
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Joined: August 18th, 2010, 17:35
Posts: 3636
Location: Massachusetts, USA
Thanks for the response.

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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: August 17th, 2021, 8:05 
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Joined: January 1st, 2018, 8:57
Posts: 7
Location: England
Spotmen wrote:
ok, I desoldered the chip and could read it.


How do you mean? Desoldered onto another adaptor, or do you have a test socket?


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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: August 18th, 2021, 2:19 
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Joined: March 11th, 2021, 10:13
Posts: 184
Location: Switzerland
I got one of those.

https://www.dolphindatalab.com/product/ ... ter-smart/


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 Post subject: Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
PostPosted: August 18th, 2021, 14:21 
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Joined: January 1st, 2018, 8:57
Posts: 7
Location: England
suricate.ch wrote:


Thank you for the info! I have been searching for a test socket for these BGA 1620 chips.

Up until now I have been using a Samsung PM971 PCIe card, I removed the existing chip and replace with the one that requires recovery. Very fiddly reball job (using universal stencil) but I have had a lot of success using soldering/reball method (Device can be access via PC3000 portable PCIe adaptor)

This USB adaptor will save me quite a lot of time!

Again, thank you!


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