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Toshiba TC58NC6134G6F controller
http://forum.hddguru.com/viewtopic.php?f=27&t=38602
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Author:  blackmagick [ July 4th, 2019, 8:15 ]
Post subject:  Toshiba TC58NC6134G6F controller

Anyone worked with devices using this controller before?

Got a stick that has this controller and a 16 GB Toshiba NAND chip w/ 17664b page size, ordered in 16x (1024,4,70) code word blocks.

I've extracted the XOR key since it was static, but I'm not sure about the correct ECC here. All the code word analysis functions and checking up against the database doesn't yield anything useful, so thought I'd ask here if anyone has suggestions for ECC parameters that should be tried?

Author:  arvika [ July 4th, 2019, 15:33 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

Most of latest Toshiba controller need deXOR whole data, SA and ECC area, than you can use ECC on dexored dump.

Author:  blackmagick [ July 5th, 2019, 1:49 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

Yah, I've seen those as well, but this controller seems to only data area xor'ed, as you can see in the image below. Or at least spare area isn't xor'ed, thus I would assume ECC isn't either.

Image (https://i.imgur.com/W63lsyQ.jpg for full size picture).

Author:  arvika [ July 5th, 2019, 9:41 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

All is XORed.

Author:  Amarbir[CDR-Labs] [ July 6th, 2019, 15:52 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

Hello,
The SA Is Also Xored , There Is So Much Noise In PIC For SA .SA Is Clean If Not Xored ,This is Definitely a Xored SA

Author:  blackmagick [ July 11th, 2019, 2:36 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

Have to say I don't agree with you. If I use a key that include SA+ECC, the dump will after XORing have SA that is all 0xFF for ALL the SA, so I end up with a page that is 16*(1024b random data + 4b*0xFF + 70b random data), so this is definitely NOT correct. If I include SA only in the XOR key, the key size of the dump can't be a multiple of the XOR key size, and again the output result is totally wrong, so you are both wrong here.

Author:  melvin [ July 11th, 2019, 9:36 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

This SA has no information usable. Heard that FE can make it work but never had a chance to try. I think, that the only way with RuSolut is RAW search.

Author:  HaQue [ July 12th, 2019, 2:20 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

yes some of the Toshiba use layouts from SSS controllers and in FE are solved (somewhat) with Virtual Translator.

Author:  blackmagick [ July 12th, 2019, 3:12 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

melvin wrote:
This SA has no information usable. Heard that FE can make it work but never had a chance to try. I think, that the only way with RuSolut is RAW search.


I'm not intending to reconstruct the data or anything, I'm working on another project that would yield better results if there were less bit errors in the dump, so I'm basically only interested in the ECC for this controller. E.g. suggestions for polynomial / order, etc. The results from using the "code word analysis" in Rusolut aren't satisfactory but I'm not sure if it's because it suggests the wrong ECC parameters or if it's because the dump has too many errors.

But the tip from HaQue about Toshiba having similarities with SSS is interesting, I'll dig a bit into what they do and check if I can find something that maybe works on this dump as well.

Author:  tungphatcomputer [ July 12th, 2019, 4:12 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

Some of the Toshiba use layouts from SSS controllers and in FE are solved (somewhat) with Virtual Translator.

Author:  mhp666 [ July 13th, 2019, 15:45 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

In toshiba the ecc is usually applied after the xor.
If you can upload a block of the dump, maybe I could help you.
A greeting.

Author:  blackmagick [ July 15th, 2019, 6:17 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

I've uploaded 5 blocks from the dump to we transfer. https://we.tl/t-MgA4wzSXWh

I have also included the extracted XOR key for the controller. If needed I can make upload a bigger dump, but I assume this should be enough to look at the ECC.

Author:  Sasha Sheremetov [ July 17th, 2019, 6:26 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

Hi,
We have this one supported however you need to use SSS resources from update 3.5 (We should probably rename them all to Toshiba/SSS it's same devices):
Connect XOR to PhyImage and select
SSS6695(17664b_256p_1098_xoredSA_ECC)_809E9C.xor (do not adjust key to page)
Then connect ECC to XOR element and select
SSS6695_17664(ecc70b)_16_X.bch

Dump quality is pretty good btw, minor ReRead will be required (maybe 3 passes without even Read Retry).

Author:  blackmagick [ July 18th, 2019, 2:32 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

Thanks, Sasha. In the process of renewing the support now - had totally forgotten about it, so will try that once I've gotten around to download the new version. As for dump quality, might be that the overall is good, but I have a feeling there might some errors in the FW region of the dump that makes my other project not working as intended, hence why I just want to fix as many as possible.

Author:  mhp666 [ July 18th, 2019, 19:25 ]
Post subject:  Re: Toshiba TC58NC6134G6F controller

I'm sorry I have not seen it before.

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