HDD GURU FORUMS :: View topic - Samsung EVO 850

A DR company would follow the procedure in that video. Safe mode allows the tool (PC3000) to upload a custom loader which then builds a virtual translator (to replace the damaged Flash Translation Layer).

Connecting the drive to a Linux box didn't reveal anything in the "dmesg" so I think it was not detected at all.
I tried the "safe mode" but it didn't help either.

@DRUG

It is good to know that the controller is supported by DR companies like yours.

Wondering how much does your company usually charge for the DR service?

Thanks

going to play with the board before I destroy it

Author:	silcontool [ December 30th, 2022, 17:04 ]
Post subject:	Samsung EVO 850 - workstation won't boot
Hello, All of a sudden this SSD won't work. Something happened last night and HP Z workstation got rebooted. It won't boot of the drive anymore. I get error "Non-system disk". Not sure if some electronics inside is dead or not. I opened the case. The board doesn't show any sign of damage that I can see. Can someone please advise on the troubleshooting steps I should take? Hopefully data is intact and can be retrieved. Thanks

Author:	silcontool [ December 31st, 2022, 22:14 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
Thanks for help response. I'm waiting to receive SMD probes. My DIMM probes are too big for the task. I had bought this drive in 2015 and its warranty expired in 2020. Would SSD stop working if it crosses defined TBW ? Going to connect it a Linux box and try to get more information about what's probably wrong with the drive which apparently seem dead. Also thinking about taking it to a Data recovery company.

Author:	fzabkar [ December 31st, 2022, 23:08 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
Usually these drives fail when the firmware "panics", which in turn is usually due to bad NAND. You can determine whether the flash controller has basic sanity by shorting the "safe mode" test points at power-on. The drive should then identify itself with its default factory ID, albeit without data access. https://blog.acelab.eu.com/pc-3000-ssd-samsung-family.html

Author:	silcontool [ December 31st, 2022, 23:32 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
Question for you in regard to the "safe access" try. Will it spoil NAND or data in anyway? I guess it is done at the controller level? If it is, they it may not be harmful I think. I don't have PC3K so it is like a blind game. Would it revive the panic'd firmware in some way and get back to normal operation possibly in the next reset? In the video, a modified firmware was used which probably provided access to the data. If the unit has a bad NAND, would it mean a some loss of data if not all ? Would remaining date be possible to retrieve in a specialized way via DR services company? I wonder what a DR company would do in this case and charges? Thanks

Author:	fzabkar [ December 31st, 2022, 23:39 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
A DR company would follow the procedure in that video. Safe mode allows the tool (PC3000) to upload a custom loader which then builds a virtual translator (to replace the damaged Flash Translation Layer). The data is then retrieved, albeit with possible bad sectors. I am not aware of any DIY solutions in such a case. I have never heard of safe mode damaging the data, otherwise why would PC3000 do it?

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Samsung EVO 850 - workstation won't boot http://forum.hddguru.com/viewtopic.php?f=10&t=42976	Page 1 of 4

Author:	silcontool [ January 1st, 2023, 1:15 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
Just to confirm the "safe mode" test points are the next 2 holes left of the 5 holes right? There are 2 smaller holes at the very left of these 7 holes. Thanks

Author:	Lardman [ January 1st, 2023, 6:10 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
fzabkar wrote: A DR company would follow the procedure in that video. Safe mode allows the tool (PC3000) to upload a custom loader which then builds a virtual translator (to replace the damaged Flash Translation Layer). There's only support for the 850 PRO Controller SNLN045X01-8030 not the 850 EVO . We're currently blind on these too without custom solutions unless one of the larger labs knows something I don't. Very occasionally you may get access by flicking it in and out of safe mode - but it's rare, most of these are degraded nand after 7 years use it's to be expected.

Author:	silcontool [ January 1st, 2023, 20:44 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
Connecting the drive to a Linux box didn't reveal anything in the "dmesg" so I think it was not detected at all. I tried the "safe mode" but it didn't help either. The chips don't feel like warmed after been powered up for a while. Somehow I feel like a component failure, suspect fuse. I will check the voltages once I've the probes.

Author:	fzabkar [ January 1st, 2023, 20:50 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
silcontool wrote: Connecting the drive to a Linux box didn't reveal anything in the "dmesg" so I think it was not detected at all. I tried the "safe mode" but it didn't help either. I'm not a data recovery professional, so I've never actually seen how a Samsung SSD behaves in safe mode. Perhaps it sends a message to its UART port? FYI, this is how other flash controllers identify themselves in "ROM mode" (aka safe mode): http://vlo.name:3000/hw/ssd/rommode/ You can get some insight into safe mode, etc, in the following document: http://www2.futureware.at/~philipp/ssd/TheMissingManual.pdf

Author:	Test_Drive [ January 2nd, 2023, 16:23 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
Hi silcontool, Same ssd (850 evo 500gb) and the same thing happened to me today. I was not at home for 3 days. My computer was off. I came back today, tried to started the pc and it went on bios. After few attempt I saw that my ssd was not detected anymore... I bought it in 2015. I checked Samsung Magician and SSD Life like a month ago and all was good. I tried another sata port, no change. Then I tried my usb/sata adapter, nothing showed up in windows or Disk Manager.

Author:	silcontool [ January 2nd, 2023, 23:06 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
Oh man. Sorry to hear about that. In my case, my computer was on ( usually stays on ) and no apparent SSD issue observed prior to failure. Going to contact a DR company to check if they can help in recovering the data. Seems PC3000-SSD does support the controller so maybe there is a hope but then I don't know what DR company is capable of. If they could, don't know what the cost would be.

Author:	pepe [ January 3rd, 2023, 4:56 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
@Test_Drive S4LN062 is not listed in pc3k support list. I made some research last year and got somewhere, but i was working on working ones, so the problem with yours needs to be identified. I have some thoughts about yours and would check it if you don't mind sending it. Since this is an active research, no ready solution yet, so it might take a longer period of time to get the data off the unit. pepe

Author:	silcontool [ January 3rd, 2023, 14:53 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
I will wait until I hear back from DR company. @pepe - Would you like to share your effort / research you have had with this SSD operation? I tried the "safe mode" but since I didn't have the UART port up, I don't know know what happened in there but it didn't help.

Author:	DRUG [ January 3rd, 2023, 19:05 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
We can deal with S4LN062 controllers. However the quality of recovery is always around 60/75% due to NAND wear.

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Author:	silcontool [ January 3rd, 2023, 20:15 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
@DRUG It is good to know that the controller is supported by DR companies like yours. Wondering how much does your company usually charge for the DR service? Thanks

Author:	DRUG [ January 4th, 2023, 5:01 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
silcontool wrote: @DRUG It is good to know that the controller is supported by DR companies like yours. Wondering how much does your company usually charge for the DR service? Thanks We charge 1250€+VAT. We need about two weeks for full reading. Payment is only required if data is recovered. No data no fee.

Author:	silcontool [ January 6th, 2023, 19:23 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
Ouch!! I don't need to recover the data, so going to play with the board before I destroy it

Author:	Lardman [ January 7th, 2023, 6:42 ]
Post subject:	Re: Samsung EVO 850 - workstation won't boot
silcontool wrote: going to play with the board before I destroy it Please don't just destroy the drive when you're done with it. As Pepe says, as an industry we lack research and development drives and faulty material we can actually work on rather than client cases. Without doing this recovery prices will always remain high. If it's just going in the bin consider donating it to a lab for research instead.