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| Flash/MicroSD/CF In general Question http://forum.hddguru.com/viewtopic.php?f=10&t=38035 |
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| Author: | einstein9 [ February 7th, 2019, 4:58 ] |
| Post subject: | Flash/MicroSD/CF In general Question |
Dear Experts... (The experts in NAND recoveries) Sometimes we receive DEFECTED MicroSD, Flashes and CF memories, The Question here for you guys is this: Why Windows (for example) reads it as 30mb? Why 30mb?, why not for example 100 or anything else?... (i have few samples of those) Anyone knows here? thank you 
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| Author: | ddrecovery [ February 7th, 2019, 9:16 ] |
| Post subject: | Re: Flash/MicroSD/CF In general Question |
I always presumed it was the size of the controller, but maybe not. That is a good question. |
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| Author: | einstein9 [ February 7th, 2019, 10:30 ] |
| Post subject: | Re: Flash/MicroSD/CF In general Question |
ddrecovery wrote: I always presumed it was the size of the controller, but maybe not. That is a good question. I thought about that, but really 30mb or 100mb of data(instructions) inside the controller is really Huge amount of data (for single flash/mem) i really cannot find a Tech. Doc. talking about this thats why posted it here... Maybe one of those knows Sasha/Sergey/Michal i don`t know still waiting for others opinion but Thx for bringing this here.. 
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| Author: | HaQue [ February 7th, 2019, 18:37 ] |
| Post subject: | Re: Flash/MicroSD/CF In general Question |
Had Kingston MicroSD show 31Mb. I have repartitioned some before with this issue and they appeared to work ok after... but I would never use a MicroSD for anything after any time of issue like this. I would hazard a guess that part of the partition table has been corrupted, probably due to degrading NAND, and windows interprets wrong. being SD, it could be a secure digital partition is showing while the normal user partition is gone. Never seen this on anything other than MicroSD cards. |
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| Author: | ddrecovery [ February 7th, 2019, 19:05 ] |
| Post subject: | Re: Flash/MicroSD/CF In general Question |
HaQue wrote: Had Kingston MicroSD show 31Mb. I have repartitioned some before with this issue and they appeared to work ok after... but I would never use a MicroSD for anything after any time of issue like this. I would hazard a guess that part of the partition table has been corrupted, probably due to degrading NAND, and windows interprets wrong. being SD, it could be a secure digital partition is showing while the normal user partition is gone. Never seen this on anything other than MicroSD cards. I have also seen quite a few standard flash drives with 30mb(ish). When looking at the data in hex it is either all 00 00 or FF FF. |
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| Author: | Ronald111 [ February 24th, 2019, 11:09 ] |
| Post subject: | Re: Flash/MicroSD/CF In general Question |
And sometimes it is 2TB...on average non-fake 8GB MSD |
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