USB Things..

KaL · Post by **KaL** » Sun Apr 03, 2005 11:50 pm

Sniffing my PSP to PC USB connection... I found something weird. My PSP sends Filelist of previously stored data.. Deleted ones.
What the hell is that thing ?

mc · Post by mc » Mon Apr 04, 2005 12:25 am

USB mass storage devices do not work with "files", they work directly on sectors. So the PC asks for some sectors of the "disk", and then has to figure out for itself which files exist, etc. Filesystems often do not eradicate all information about a file when it is deleted, they will just mark the space as available and so most the information will stay there until overwritten by a new file. If you snooped the communication on the IDE bus between your PC and your harddrive, you'd see the same thing.

KaL · Post by **KaL** » Mon Apr 04, 2005 12:27 am

Thanks :)

darkfader · Post by **darkfader** » Mon Apr 04, 2005 4:30 am

Overflow USB stack... or filesystem driver...

nanoscopic · Post by **nanoscopic** » Mon Apr 04, 2005 4:52 am

lol @ darkfader... I was thinking the same thing. Seeing as the title offset can browse into memory I am wondering what else in the system can offset into other places. It seems that memory isn't protected all that well internally to me.