I haven't tried it, but according to edepot.com, regardless of physical dimensions, 1T is the largest that the PS3 supports:
"The maximum size of the internal harddrive that the PS3 supports is 1TB (TeraBytes). It is possible to use eSATA to hook up an externally cased 3.5" harddrive, but it would need to be powered separately, and the drive would sit outside of the PS3 (the 1TB limit still applies)."
I'd be curious if you or anyone has tried something bigger and if so, does the PS3 recognize the correct size.
i read a thread somewhere here awhile back where somebody modifies their case to fit a 2tb drive and it did work and some say they have one sitting external with a sata and power extension cable hooked up internal working but others say it don't,i guess it really depends on the drive but people running older CFW use drives this big all the time without any issues..
ok question... i know this is related to the xbox and i hate the xbox for yet another reason because of this thread.....why the hell would they allow you to install games to the harddrive if theyre just gonna require you to have the disc on the disctray anyway? THAT DEFEATS THE PURPOSE OF INTALLING GAMES TO YOUR HARDDRIVE TO PLAY WITH OUT THE DISC. whoever thought that was a good idea you sir are retarded. thankyou!