I have searched all over the last few hours for a solution to this issue and yet it mystifies me.. I was running Mr robinson's rooted stock and my phone ran out of battery while at the store, when I got home it refused to boot up.. I have tried several ODIN formats, tried kies... When I get in stock or custom recovery it will fail to mount EFS partition Invalid argument.. Even after a full ODIN flash! Now the good thing is, I have fresh backups and even direct and recent full system and direct file backups of both my efs.tar.gz file and a 20mb file which I believe is the EFS partition... Yes nothing I mean nothing works, At this point if someone is willing and able to help me, you will be my eternal hero!
Thanks in advance for any assistance