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| Data Recovery Methods - Chip-Off and JTAG |
There area unit 2 main techniques once coping with portable information recovery and flash
recoveries. By interrogating the NAND silicon chip, each of those techniques provides information recovery engineers access to a low-level image of the info, though they're each terribly completely different. Mobile phones, flash storage, and solid-state-drives all deem memory chips for storing data in distinction to disk drives, that use rotating platters and read/write heads.
When it involves disk drives all of them tend to use a standard approach to storing information, which means that information recovery tools are generic. Flash devices on the opposite hand vary tons a lot of having a wealth of various information formats, file structures, algorithms, memory sorts and configurations, information extractors area unit usually 'device specific'. this suggests that the sole thanks to gain a small amount for a bit copy of the information is to interrogate the memory chips directly, effectively bypassing the OS. this can be wherever chip-off and JTAG technology comes into play.
The first technique is that the chip-off approach. this method needs de-soldering the silicon chip from the electronic equipment. to get rid of the chip from the device while not inflicting any injury it needs preciseness ability below a magnifier as creating any small mistakes risks losing all the info for good . when the chip is removed it is scan with information extractors. NAND chips area units sometimes a lot easier to scan than different sorts of chip and area units usually what Coyote State cards and iPhones use. this can be thanks to the memory design and pin configuration being standardized. The pins area unit on the surface which means there's no got to construct the connectors. different common sorts of the chip like the BGA have multiple connectors on the undersurface that area unit directly, therefore, soldered to the motherboard with thousands of various configurations so area unit was far more tough to get rid of.
The second technique is JTAG which does not need the removal of the chip. an information recovery engineer will typically access the memory through the JTAG ports. this can be a far a lot of drawn-out methods and doesn't injury the media. this suggests it is unbroken during an operating state that is typically a crucial demand in rhetorical investigations. A drawback of this technique is that it's not continuously as no-hit and might be a riskier choice.
Both strategies can turn out a low-level image that is then 'decoded' and also the user's information is restored . each chip-off and JTAG technology is growing and changing into far more reliable which means that the success rates of knowledge recovery from mobile phones are sort of pretty much as good as that of disk drives.
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