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SKhynix M+B mSATA SSD not recognized
http://forum.hddguru.com/viewtopic.php?f=10&t=42860		 Page 1 of 1
Author:  canebaycomputers [ November 13th, 2022, 12:25 ]
Post subject:  SKhynix M+B mSATA SSD not recognized
SKhynix SC300 M.2 2280 512 GB. There is no doubt this is not working. I've tried plugging it into a PCIe adapter card, USB adapter and now a SATA adapter. In the thermal the SH878104AA chip just gets a little warm. I tested all caps for any shorts and see no issues there. No missing components. No corrosion. My only guess is that this is a controller chip and would need to be replaced? I did already order a duplicate SSD that has that same chip. Not sure if that even works? Does it hold TRIM data? Just not sure on this. I realize this is a M+B key mSATA and I have plugged it up properly into the correct adapters that support it. I do run a professional computer and mobile repair shop but I'm limited on advanced data recovery. I don't have much experience and don't have pro tools. Willing to learn and invest. Any help or advice very much appreciated. Thank you in advance.

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Author:  fzabkar [ November 13th, 2022, 20:32 ]
Post subject:  Re: SKhynix M+B mSATA SSD not recognized
The typical failure in SSDs is a "firmware panic" resulting from bad NAND.

The only DIY electronic options are to test for the presence of each of the onboard power supplies.

If you can locate the "ROM mode" or "safe mode" shorting points, then this will test for basic sanity in the flash controller.

Some SSDs have a "key" in the controller. Transplanting such a controller to a donor PCB would be unsuccessful.
Author:  Arch Stanton [ November 13th, 2022, 21:18 ]
Post subject:  Re: SKhynix M+B mSATA SSD not recognized
fzabkar wrote:
The typical failure in SSDs is a "firmware panic" resulting from bad NAND.

The only DIY electronic options are to test for the presence of each of the onboard power supplies.

If you can locate the "ROM mode" or "safe mode" shorting points, then this will test for basic sanity in the flash controller.

Some SSDs have a "key" in the controller. Transplanting such a controller to a donor PCB would be unsuccessful.


Franc, in your opinion should 126F even be considered (too) hot?
Author:  fzabkar [ November 13th, 2022, 21:29 ]
Post subject:  Re: SKhynix M+B mSATA SSD not recognized
Arch Stanton wrote:
Franc, in your opinion should 126F even be considered (too) hot?

That's 52C. I've regularly seen temperatures go higher than 70C (in the user forums) before the SSD starts throttling. This is especially true for NVMe SSDs.

GSmartControl will report the temperature history for those SATA devices that support it. The logs may also report the trigger points and the number of times they've been exceeded.
Author:  labtech [ November 15th, 2022, 22:30 ]
Post subject:  Re: SKhynix M+B mSATA SSD not recognized
The most common problem with SK Hynix, as with most SSDs in general, is NAND flash chip degradation.

The controller on your SSD is fine.

The firmware design on Hynix is complex and there are virtually no solutions for that type of problem on that model, sorry.
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