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Nintendo 3DS
Check nand integrity on pc using the .SHA files?
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<blockquote data-quote="The Real Jdbye" data-source="post: 6555165" data-attributes="member: 248256"><p>Hourglass9/Decrypt9 probably generate the hash while reading the NAND, so if any corruption occurred on the SD card even if it was during writing, the hashes wouldn't match. The chances of reads failing without an error, leading to corruption, are infinitesimally small, it's much more likely to corrupt during writing.</p><p></p><p>You are right though, if someone is paranoid and wants to be 100% sure then making multiple NAND backups is the only way.</p><p>But something would have to be wrong with the NAND itself for the reads to fail (unless there is a serious bug in the homebrew apps) and at that point you are pretty much screwed anyway.</p><p></p><p>Anyway, in OP's scenario (bad SD card), the SHA checksums wouldn't match and a checksum tool would tell him that, so I think it answers his question.</p><p></p><p>Verifying the checksum on a PC wouldn't be necessary in most cases, except if someone forgot to copy over the .sha file they wouldn't be able to tell if a backup was corrupted.</p></blockquote><p></p>
[QUOTE="The Real Jdbye, post: 6555165, member: 248256"] Hourglass9/Decrypt9 probably generate the hash while reading the NAND, so if any corruption occurred on the SD card even if it was during writing, the hashes wouldn't match. The chances of reads failing without an error, leading to corruption, are infinitesimally small, it's much more likely to corrupt during writing. You are right though, if someone is paranoid and wants to be 100% sure then making multiple NAND backups is the only way. But something would have to be wrong with the NAND itself for the reads to fail (unless there is a serious bug in the homebrew apps) and at that point you are pretty much screwed anyway. Anyway, in OP's scenario (bad SD card), the SHA checksums wouldn't match and a checksum tool would tell him that, so I think it answers his question. Verifying the checksum on a PC wouldn't be necessary in most cases, except if someone forgot to copy over the .sha file they wouldn't be able to tell if a backup was corrupted. [/QUOTE]
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