QUOTE(Frog_Racer @ Nov 29 2009, 02:34 PM)

they could have sent a command to the xbox telling them to dump the firmware to the hdd and then do a checksum against the hash (because microsoft would know what models had which type of drive) and if they differed put up a ban flag.
thats just speculation
I don't think that is possible, reason being the drive would need to be entered into its vendor mode for reading/writing fw. The drive is inoperable for normal gameplay use during this stage so I don't think m$ pursued this route for detection. I'm pretty sure they used a series of methods outside of dumping fw to detect whether or not the box is modified. for example, with all the added security checks that ixtreme offered, increased the time interval of the dvd drive accepting the disc (a stock drive would have a few checks, ixtreme had several) So perhaps a bit of code flagged itself each time a game took longer to verify than it should. And bam, m$ just figured out a way to detect modded firmware without actually detecting modified firmware, but rather detecting these inconsistencies.