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Samsung MZ-NTD1280 - 128 GB M.2 NGFF SSD B + M Key http://forum.hddguru.com/viewtopic.php?f=10&t=39002	Page 1 of 1

Author:	MasterT [ October 8th, 2019, 11:38 ]
Post subject:	Samsung MZ-NTD1280 - 128 GB M.2 NGFF SSD B + M Key
It has Samsung S4LN021X01-8030 controller which is on Acelab supported list (https://blog.acelaboratory.com/pc-3000- ... dated.html) Attachment: MZ_NTD1280_000__77857.1428307510.png [ 230.96 KiB \| Viewed 10579 times ] Searching by P/N or Model it revealed to be Lenovo 128GB SATA III 6.0Gb/s OEM Internal SSD or Samsung 128GB PM841 NGFF M.2. Connected to SATA adapter it's not detected on power on, but gets a little warm. First Connected to NVMe to USB 3.1 adapter in Read Only mode it got detected as 128GB drive but not accesible. Than I switched off Read Only mode switch and since than it does not get detected anymore. Attachment: 20190502_194927mod - Copy.jpg [ 641.53 KiB \| Viewed 10579 times ] Any solution for this one?

Author:

MasterT [ December 4th, 2019, 4:52 ]

Post subject:

Re: Samsung MZ-NTD1280 - 128 GB M.2 NGFF SSD B + M Key

I've done some measurements. fzabkar can you help me figure out what's wrong?

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Author:	fzabkar [ December 4th, 2019, 14:59 ]
Post subject:	Re: Samsung MZ-NTD1280 - 128 GB M.2 NGFF SSD B + M Key
It's definitely a SATA device. You can determine this from the CONFIG pins: http://www.hddoracle.com/download/file.php?id=7418&mode=view M.2 format identification: http://www.hddoracle.com/viewtopic.php?f=106&t=2506 It appears that the PMU IC (Power Management Unit) is not outputting any voltages. It is receiving a 3.3V input, though. This would suggest that this IC is dead, or is not being enabled. I can't see the marking on the small IC in the top right corner, but I suspect that it is an e-fuse or load switch. It would be switched on and off via the DEVSLP signal on the interface (pin #38). I would measure DEVSLP, but I suspect that it is OK.

Author:	fzabkar [ December 4th, 2019, 15:23 ]
Post subject:	Re: Samsung MZ-NTD1280 - 128 GB M.2 NGFF SSD B + M Key
I would test the resistances between ground and each of the inductors at the PMU IC. If the power supplies power up in sequence, then it may be that a short on one output is holding up all the others.

Author:	fzabkar [ December 4th, 2019, 17:20 ]
Post subject:	Re: Samsung MZ-NTD1280 - 128 GB M.2 NGFF SSD B + M Key
The e-fuse appears to be a house marked STEF4S, in which case it is enabled and working. http://www.hddoracle.com/viewtopic.php?f=100&t=1615&p=8872#p8872

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