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| Can someone identify this first sector in a flash drive ? http://forum.hddguru.com/viewtopic.php?f=10&t=29184 |
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| Author: | Matiw [ August 2nd, 2014, 8:33 ] |
| Post subject: | Can someone identify this first sector in a flash drive ? |
Attachment: hex.txt I was examning a Flash drives MBR to check if there is any Byte-interleave. The dump from the Flash drive has already gone through some processes such as XOR extraction and others, but I can not yet see a normal Fat32 MBR yet. Can someone help. Attached is the dump after the processes.
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| Author: | Sasha Sheremetov [ August 2nd, 2014, 9:05 ] |
| Post subject: | Re: Can someone identify this first sector in a flash drive |
There's no file attached to topic. |
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| Author: | Matiw [ August 2nd, 2014, 10:57 ] |
| Post subject: | Re: Can someone identify this first sector in a flash drive |
Sorry, here is the bin file> http://www.filedropper.com/hex |
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| Author: | HaQue [ August 2nd, 2014, 13:41 ] |
| Post subject: | Re: Can someone identify this first sector in a flash drive |
looks like part of the flash firmware, or a cd partition on the flash drive. IMHO it should start with BtPramCD so yes, maybe some interleave or something not done right. see comparison with my example which is a code file example that flashes leds on a flash drive when uploaded to one. Attachment: a.jpg [ 254.68 KiB | Viewed 9864 times ] |
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| Author: | Sasha Sheremetov [ August 2nd, 2014, 14:19 ] |
| Post subject: | Re: Can someone identify this first sector in a flash drive |
Bit errors..Apply ECC. There's no byte split in PS2251(looks like Phison). You either overheated chip or standard 3.3V produces too much noise. Attach one block with data here I check it in bitmap |
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| Author: | Sasha Sheremetov [ August 2nd, 2014, 15:47 ] |
| Post subject: | Re: Can someone identify this first sector in a flash drive |
This is bit error from HaQue's comparison 
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| Author: | Matiw [ August 3rd, 2014, 12:52 ] |
| Post subject: | Re: Can someone identify this first sector in a flash drive |
Does ECC function well in a transformed page ? Will not some of the ECC information get lost during the process ? Sasha Sheremetov wrote: This is bit error from HaQue's comparison
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| Author: | Sasha Sheremetov [ August 3rd, 2014, 16:07 ] |
| Post subject: | Re: Can someone identify this first sector in a flash drive |
You need to apply ECC on physical images (dumps). If chip has bad columns then remove them and apply ECC on the result. (Most latest TLC chips of Sandisk [0x45] and Toshiba [0x98] have them.) |
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| Author: | Matiw [ August 4th, 2014, 11:22 ] |
| Post subject: | Re: Can someone identify this first sector in a flash drive |
Thank you everyone for your help. I have succeeded in recovering all the data. The problem was that the auto method failed to identify the correct Translator, I got the right info from Solbase. It have to admit that I was a little lazy to ask for help without first looking there. Thanks |
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