I had a issue yesterday with my hard drive. I do own a JB-king dongle. I was trying to make a game save work using PS3 Save Unlocker. And after making the new SFO i FTP to transfer over the game save. I didnt have the JB-King in at the time of the transfer. I turned off the PS3 and put the JB-King in and turned the PS3 back on. Everything seemed fine, i went to multiman and the system froze. I turned it off pretty fast after i figured out that it had froze. After turning it back on there was a message telling me that my HDD was corrupt. Freaked me out, i was thinking my external was also corrupt. Took my external to my PC and everything was there, thank god. So i went ahead and followed the PS3 directions to format the HDD. After the format the PS3 restarted and i could see my user name. Clicked on it and the PS3 started up like nothing happened. The only thing missing was my PSN games. All PSN games are gone.
Now i cant say for sure if it was the "JB-King" or even if it was the program "PS3 Save Unlocker". But something did happen far enough to want to format the internal hard drive. I have not touched it sense. I had been playing the game Top Gun: Hard Lock. I played it a couple of times over the last few days turning the PS3 off and on.