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1  Other / Beginners & Help / Re: bitcoin qt wallet on USB seems to be reseted - i fear i lost EVERYTHING! on: May 13, 2013, 08:12:06 PM
That sucks man.

I would avoid using Windows for now and use a Live CD to start recovery software. If you're on a regular HDD there's a good chance that the part that contained the wallet.dat isn't physically overwritten yet. It might still be there, your filesystem just doesn't know about it anymore.

Did you keep a copy of the "messed up" wallet.dat? What happens when you load it (a copy of it!), does it have a completely different address?

i read that it sometimes a file is nit overwritten even if it says so. that just the index of where the file was is overwritten. at least thats what i understood with my limited konowledge. i am reading more to try to understand if this could be the case.
if i load a copy of the wallet i get an error code, saying that the wallet is damaged and can not be read.

The physical file isn't always overwritten indeed. When you delete something you basically tell your filesystem to mark that spot on the harddrive as free again. The actual data is still there, your filesystem just has no way to reference to it anymore.  That is best case scenario. Recovery programs will be able to recover the files (not the names though, as they were stored in the filesystem) most of the time. If it has been overwritten (eventually you will write to that spot that is marked as "free") there is still a chance, but afaik only with specialized hardware, to recover pieces of the data.
2  Other / Beginners & Help / Re: bitcoin qt wallet on USB seems to be reseted - i fear i lost EVERYTHING! on: May 13, 2013, 06:58:47 PM
That sucks man.

I would avoid using Windows for now and use a Live CD to start recovery software. If you're on a regular HDD there's a good chance that the part that contained the wallet.dat isn't physically overwritten yet. It might still be there, your filesystem just doesn't know about it anymore.

Did you keep a copy of the "messed up" wallet.dat? What happens when you load it (a copy of it!), does it have a completely different address?
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