In wich zone of a flash memory could a write some characters that will not get erase by formatting ?

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Hello, I'm new here, english is not my native language, but I'm gonna do my best.

I need to know in wich zone or byte(s) could I write a few lines (in flash memory) that do not get erase after format the flash.......

I really apreciate any help...thanks in advance

pasted by Emilio, from a fake answer ...
The flash that i'm talking about is the normal memory flash that people usually use daily, you know to transport photos and the normal things that normal users usually do, not embedded or sd.......but are you saying that we normally haven't privileged to access to the flash ?.......

To be exact:
I have a group of flash memories, not sd, just the common memories that we use to transport information all the time. the problem is that i need to mark this flash and asociate this mark with some password that the user of the flash could has.. I could do this encripting some file and copying it like normal data into the flash memory, but the problem is that it is a common file that any user could see and erase as you said, i need to achieve that in a low level(I guess) that the common user could not see the mark and even could not erase it by normal ways

Posted 23-Jun-11 8:58am

glbrt.gds

Updated 23-Jun-11 10:04am

Emilio Garavaglia

v3

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CPallini · Answer 1 · 2011-06-23T09:26:00

Solution 1

If you can write on it why others cannot? I mean, generally speaking, you haven't privileged access to the flash drive I/O. There are exceptions, of course, for instance if the flash is in a chip embedded in your own board then you've probably such a chance.

Posted 23-Jun-11 9:26am

CPallini

Updated 23-Jun-11 9:27am

v2

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glbrt.gds 23-Jun-11 16:08pm

The flash that i'm talking about is the normal memory flash that people usually use daily, you know to transport photos and the normal things that normal users usually do, not embedded or sd.......but are you saying that we normally haven't privileged to access to the flash ?.......

To be exact:
I have a group of flash memories, not sd, just the common memories that we use to transport information all the time. the problem is that i need to mark this flash and asociate this mark with some password that the user of the flash could has.. I could do this encripting some file and copying it like normal data into the flash memory, but the problem is that it is a common file that any user could see and erase as you said, i need to achieve that in a low level(I guess) that the common user could not see the mark and even could not erase it by normal ways

[no name] 24-Jun-11 2:46am

Any byte or area you can write to, someone else can write to too using the same technique. So if you want to secure your data with a password, this would not be the way to do it.

In wich zone of ​​a flash memory could a write some characters that will not get erase by formatting ?