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KaL
Joined: 03 Apr 2005
Posts: 41
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 Posted: Sun Apr 03, 2005 11:50 pm Post subject: USB Things.. |
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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 ? |
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mc
Joined: 12 Jan 2005
Posts: 212
Location: Linköping
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| Posted: Mon Apr 04, 2005 12:25 am Post subject: |
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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.
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Flying at a high speed
Having the courage
Getting over crisis
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KaL
Joined: 03 Apr 2005
Posts: 41
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| Posted: Mon Apr 04, 2005 12:27 am Post subject: |
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| Thanks :) |
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darkfader
Joined: 27 Mar 2005
Posts: 8
Location: Netherlands
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| Posted: Mon Apr 04, 2005 4:30 am Post subject: |
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| Overflow USB stack... or filesystem driver... |
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nanoscopic
Joined: 04 Apr 2005
Posts: 4
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| Posted: Mon Apr 04, 2005 4:52 am Post subject: |
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| 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. |
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