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 | 29 March 2012 08:48 |
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| Plymjack Photographer  Location United Kingdom Devon Plymouth |  Quote from grahamsphotographyTry it sometime, once a card is overwritten (properly) it is impossible as far as I know, the problem with formatting is that most people do not do a full format, all they do is format the directory. Which still leaves all the information intact. I had a 32GB card corrupted in a video camera last year and after a fortnight of trying nothing usable could be recovered. Even a full format will not destroy the data. US Military Spec requires software to do a deep format at least 6 times before it can be considered "clean" Even then this is only for low classified material. - higher classified material requires destructive measures - eg hard drives are crushed. Sods law also applies so when your video card corrupts with unrepeatable footage then ofcourse you will not be ableto recover it. But it is still there and it could be recovered! |
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| Real Bread Cook by day, BTL landlord & IT Guru - who said men can't multitask! | ||
| 30 March 2012 11:04 |
| EdT Photographer  Location United Kingdom Cambridgeshire | Quote from Plymjack Even a full format will not destroy the data. US Military Spec requires software to do a deep format at least 6 times before it can be considered "clean" Even then this is only for low classified material. - higher classified material requires destructive measures - eg hard drives are crushed. I think you're confusing Hard Disks and Flash Memory. Hard disks are magnetic devices. When you overwrite the data, a faint copy of previous writes will always exist. The faint copy of the previous write will eventually become too faint to be read with current technology. Memory cards use flash memory. These are effectively floating gate transistors which are either switched on or off. They have no memory of previous states so overwriting data means that any previous data will be unrecoverable. The ony way that data can be recovered from a Flash Memory is if the entries in the directory haven't yet been reused and the data blocks haven't yet been overwritten. |
| 30 March 2012 11:11 |
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| Plymjack Photographer Location United Kingdom Devon Plymouth | Youare indeed correct.... but the US miltary still require the same processing for all memeory devices. | |
| Real Bread Cook by day, BTL landlord & IT Guru - who said men can't multitask! | ||
 | 30 March 2012 11:18 |
| jes Model  Location United Kingdom Suffolk Lowestoft | Quote from Stibnite You really don't want a dooby-flip from a prison imagine how it got in there  My sister and my best friend work in a prisons and you do not want to know what else gets there!! |
| 30 March 2012 12:19 |
| EdT Photographer Location United Kingdom Cambridgeshire | Seem to remember a recent search of a Mexican jail turned up 19 prostitutes, 100 plasma televisions, two sacks of marijuana, and 100 cockerels for cock fighting. Seems anything can end up in a prison. |
| 30 March 2012 13:26 |
| peterbuchanphoto Photographer  Location United Kingdom West Yorkshire Leeds | For photographers some people here manage to really impress me by their total lack of technical know how. When a file is saved it is written as a whole load of 1s and 0s... deleting the file doesnt change these it just deletes the registry for it, allowing that area to be overwritten. once it has been overwritten those ones and zeros cannot be recovered as it has no way of knowing what it used to be set to. formatting deletes all registry files but doesnt change the ones and zeros either. A rough analogy: imagine a wall full of switches set to on and off in a specific pattern. turn the light off (delete the file) you cant see it anymore. turn the light back on (use a file recovery tool) its there once more. change all the switches to another pattern then ask somebody who never saw the original pattern to set them to what they used to be (the garbage some here suggest) There is a more secure format which randomizes all of these so as to fill it with the computer equivalent of gibberish or white noise. Some people must really think all kinds of witchcraft goes on inside the magic picture box. Maybe watch too much csi and believe the crap they see on there (the magic image enhancement that gets a clear as day face out of a 10x10 pixel amorphous blob makes me cringe) I might add with older magnetic base storage it is possible to recover some overwritten info but not magically all which is why one old method to wipe them was by powerful magnets http://www.youtube.com/watch?v=Vxq9yj2pVWk <-- beautiful homage to technical bollox --------- Sorry no matter what I do this won't retain formatting line breaks |
 | 30 March 2012 14:13 |
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| clearview_photography Photographer  Location United Kingdom County Durham Durham | Quote from peterbuchanphoto --------- Sorry no matter what I do this won't retain formatting line breaks For purestormers some people here manage to really impress me by their total lack of technical know how - cough cough  |
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| 'The banker man grows fat, working man grows thin' - Jack of All Trades - Bruce Springsteen | ||
| 30 March 2012 15:28 |
| johnlp Photographer  Location United Kingdom London | Quote from Plymjack Just a quick note to say please add "its OK I will delete it if you dont like it" to your list of10 great lies. Its a big giant porkie.... It depends who says it. Me, when I say it, I mean it, and I do it. I was going to write a lot more; but there is so much more that we do that relies on trust from both parties, that it just makes me shake my head in despair that this post is intent on sowing the seed of doubt in some models' minds about the trustworthy nature of all photographers. |
| 30 March 2012 16:43 |
| peterbuchanphoto Photographer  Location United Kingdom West Yorkshire Leeds | Quote from clearview_photography For purestormers some people here manage to really impress me by their total lack of technical know how - cough cough I know the irony wasnt lost on me. I think my tablet simply likes to be a pain in the backside at times lol |
| 31 March 2012 12:12 |
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| Plymjack Photographer  Location United Kingdom Devon Plymouth | Quote from johnlp It depends who says it. Me, when I say it, I mean it, and I do it. I was going to write a lot more; but there is so much more that we do that relies on trust from both parties, that it just makes me shake my head in despair that this post is intent on sowing the seed of doubt in some models' minds about the trustworthy nature of all photographers. Im sorry you see it that way. Trust is a 2 way thing and why you would not want the models to have the full facts seems disappointing. I posted in the " models chat" to pass on some basic information (which had come up in a much more depressing thread) and it seems so many photographers see it as a post against them. If you see giving knowledge as sowing seeds of doubt then I am sorry it was not my intention. |
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| Real Bread Cook by day, BTL landlord & IT Guru - who said men can't multitask! | ||
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