You were right! grep found two more signature blocks! How do I make use of them? videon:~ # LC_ALL=C grep -obUaP "\x5F\x42\x48\x52\x66\x53\x5F\x4D" /dev/sde 65600:_BHRfS_M 26697111807:_BHRfS_M 26854350428:_BHRfS_M On Thu, Dec 28, 2017 at 11:00 PM, Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote: > > > On 2017年12月29日 11:35, Stirling Westrup wrote: >> On Thu, Dec 28, 2017 at 9:08 PM, Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote: >>> >>> >> >>> >>> I strongly recommend to do a binary search for magic number "5f42 4852 >>> 6653 5f4d" to locate the real offset (if it's offset, not a toasted image) >>> >> I don't understand, how would I do a binary search for that signature? >> > The most stupid idea is to use xxd and grep. > > Something like: > > # xxd /dev/sde | grep 5f42 -C1 > -- Stirling Westrup Programmer, Entrepreneur. https://www.linkedin.com/e/fpf/77228 http://www.linkedin.com/in/swestrup http://technaut.livejournal.com http://sourceforge.net/users/stirlingwestrup -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
