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23.09.2023 - tech support stopped
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jeremyb



Joined: 09 Dec 2008
Posts: 1950
Location: RecoverMyFlashDrive.com Bridgeport, CT, USA

PostPosted: Tue Aug 22, 2023 21:38    Post subject: SM3281L-AB - 2c c4 08 32 1x1 - 64GB
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Same case as this:
http://www.flash-extractor.com/library/SM/SM3281/SM3281L-AB__2c_c4_08_32__1x1

All files are corrupt.. I think the mix is wrong..

BN / SN order is correct on the first half of the dump.. on the second half of the dump it's out of order.. Maybe many blocks are erased in the block pair but I feel its Cross Block..

Uploading Dump
jeremyb



Joined: 09 Dec 2008
Posts: 1950
Location: RecoverMyFlashDrive.com Bridgeport, CT, USA

PostPosted: Wed Aug 23, 2023 16:40    Post subject:
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Upload Complete
Сергей



Joined: 26 Aug 2005
Posts: 20282

Flash-Extractor developer

PostPosted: Thu Aug 24, 2023 12:12    Post subject:
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I dont know

Model match
Mix is OK. You can check with "Sector" number. Every sector goes in sequence
Xor is OK. FAT32 -> Compare tables do not show difference
Some files is OK
jeremyb



Joined: 09 Dec 2008
Posts: 1950
Location: RecoverMyFlashDrive.com Bridgeport, CT, USA

PostPosted: Sat Aug 26, 2023 1:27    Post subject:
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I wrote a script to properly assemble the image..

It's basically a Sector Number Slow implementation
(BN * Block Size) + (Sector Number * Page Size)
Top to Bottom...

There were a lot of blocks that contained unordered pages which is why none of the files opened.

99.5% Recovered..
Сергей



Joined: 26 Aug 2005
Posts: 20282

Flash-Extractor developer

PostPosted: Sat Aug 26, 2023 7:07    Post subject:
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jeremyb wrote:
It's basically a Sector Number Slow implementation
(BN * Block Size) + (Sector Number * Page Size)


Can use "bn to sn" to work with SN Slow

Job.txt attached
arvika



Joined: 18 Nov 2009
Posts: 2586
Location: Poland

PostPosted: Sat Aug 26, 2023 9:29    Post subject:
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Sergey, such solution is also possible at this case?
Сергей



Joined: 26 Aug 2005
Posts: 20282

Flash-Extractor developer

PostPosted: Sat Aug 26, 2023 12:32    Post subject:
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arvika wrote:
Sergey, such solution is also possible at this case?


Yes. I try it now. It works

But very uncomfortable
Scan works fast
But Open Image very slow
Uncomfortable check files
Can not fix conflicts

Also many paremeters. So can make errors

Better use SN Slow
arvika



Joined: 18 Nov 2009
Posts: 2586
Location: Poland

PostPosted: Sat Aug 26, 2023 12:46    Post subject:
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Thank you for check Smile
jeremyb



Joined: 09 Dec 2008
Posts: 1950
Location: RecoverMyFlashDrive.com Bridgeport, CT, USA

PostPosted: Sat Aug 26, 2023 17:24    Post subject:
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Сергей wrote:
Mix is OK. You can check with "Sector" number. Every sector goes in sequence
Some files is OK

Сергей wrote:
Can use "bn to sn" to work with SN Slow

If only a solution had presented itself before I wasted my time writing an assembler when I described the problem Rolling Eyes Rolling Eyes Rolling Eyes
arvika wrote:
Sergey, such solution is also possible at this case?

Won't this method assume pages are out of order in a single block? The issue is pages are missing in a single block AND out of order. This is why bn to sn was needed. File structure appears to be okay but almost all files are corrupt.
Сергей



Joined: 26 Aug 2005
Posts: 20282

Flash-Extractor developer

PostPosted: Sat Aug 26, 2023 20:56    Post subject:
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jeremyb wrote:
Won't this method assume pages are out of order in a single block? The issue is pages are missing in a single block AND out of order. This is why bn to sn was needed. File structure appears to be okay but almost all files are corrupt.


Yes

Raw recovery test:

SN Slow: 169 good, 84 broken jpegs
SN Old: 159 good, 79 broken
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