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Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: June 23rd, 2021, 8:08
by Spotmen
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
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: June 23rd, 2021, 18:58
by fzabkar
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
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: June 24th, 2021, 4:37
by Spotmen
Thank you. I've tried to GND before the pull up, no luck.
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: July 1st, 2021, 9:44
by Spotmen
ok, I desoldered the chip and could read it.
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: July 2nd, 2021, 17:52
by labtech
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.
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: July 6th, 2021, 5:58
by Agrail
It is a PCI-E drive, but you are trying to read it over SATA.
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: July 6th, 2021, 15:56
by fzabkar
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/The controller is an in-house design by Hynix called "ACNT038," or "Cepheus."
Interface: PCIe Gen 3 x4, NVMe 1.3
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: July 10th, 2021, 7:16
by Spotmen
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.
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: July 10th, 2021, 7:50
by labtech
Thanks for the response.
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: August 17th, 2021, 8:05
by Paradog84
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?
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: August 18th, 2021, 2:19
by suricate.ch
Re: Microsoft Surface 1911 - m.2 - SK Hynix Cepheus
Posted: August 18th, 2021, 14:21
by Paradog84
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!