Hello,

I receive this pen drive for datarecovery.
I was able to recover some smaller files(smaller then 1MB), but bigger not.
With chip off I read one physical chip with two parts.
I apply ECC correction and read retry, but there is still big amount of unreaded pages.
Read retry mode checking failed.

Any suggestion.

Thank you

Try a different application/hardware.
Clean and re-tin connector pins.
Get creative with the temperature control.
Get creative with the voltage control.
Just keep retrying.

There's no magic solution for failing nand - tune the recovery the best you can and keep hammering at it until you have enough or as much as you can get.

_________________
Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/

hello Lardman

thank you for sugegstions

i have only PC3000flash
i play with different voltages but from 83k chanis it read only few hundreds
RR works from 2.150V and up
with 2.100 appear window wit hex differences. This is only solution I didn't try, because I was not shure with it, is it OK or not.

Currently suggestion RR type for this TLC hynix chip is type 36

You mean before you chipped-off? Files were < 1 MB or larger but truncated? Was it due to read errors? Or perhaps fragmentation?

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Joep - http://www.disktuna.com - video & photo repair & recovery service

before I chip off I can see files/file structure with all atributes/sizes, but was able to copy files smaller than 1Mb. Those files are ok.
But I was unable to recover files, which are larger then 1MB.

As I can see, there are unread parts from start to the end of each part of memory chip. Thats why smaller files are recoverable and larger not.

Yeah but what exactly happened when you tried to copy those 1+ MB? Files larger did not copy at all, or did copy but only partially copied, truncated at 1 MB?

I assume you tried cloning it before chip-off, what happened?

The 1 MB doesn't make much sense to me in relation to typical page/block sizes (I am no expert on the matter but still trying to apply common sense I fail to see the rationale of the 1 MB cut-off).

_________________
Joep - http://www.disktuna.com - video & photo repair & recovery service

I'm guessing the size is a coincidence rather than a cause.

_________________
Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/

Ah, yes! Anyway, my point is, wasn't logical recovery given up on rather easily .. I mean truncated files due to file corruption, file system corruption or fragmentation aren't solved by chip-off per se. But you're right, I got carried away with the 1 MB thing.

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Joep - http://www.disktuna.com - video & photo repair & recovery service

i would also have had tried imaging it through interface... then work on the image.

pepe

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Adatmentés - Data recovery

If the damage is not actual representation of the files and structure (which means you are S.O.L) then it is likely you don't have parameters correct for this job.

These controllers can be simple block pair with join by page, but also more complicated such as this FE example:


mess that up and you won't get a proper filesystem, or you could also get partial recovery.

maybe post a pic of the device, both sides, and the parameters for the PC3K task

jerovsek appears to have a decade of experience, I assumed everything possible would have already been done to get an image via the controller and that failed - so a move to chip off. The blocks need to be read before anything can be reassembled otherwise they're just white space. My understanding was the OP was stuck at this point but if it's read correctly and there are still problems then time to examine the layout.

_________________
Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/

thank you all for suggestions

first I try with logical recovery and image creation.
With image creation there was a lot of read problems. That was the reason for chip off.

Now I need to read as much as possible from chip. I don't get better result from read retry.

Any suggestion, what I need to tune to get better results?

Thank you

Whats the chip ID?

@Haque: for sure ad 3a 18 03

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Best regards,
Boguslaw Rzepka,
Multi-COM Ltd., Poland

if it is, then Yuk! This is a WL chip, it doesn't have software bad bytes does it? if you look on the PCB and identify the normal VCC pins, are there any others that are also tied to the regular VCC pins? Maybe you need what SC NR calls a power mod.

Read This Too -> https://forum.hddguru.com/viewtopic.php?f=27&t=40000

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Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com