This article makes me think QNX is the OS used in G.

http://edageek.com/2007/06/05/qnx-oil-gracenote/

I belive this is what my old 3Com Audrey runs.. It's quite a lean OS so not surprising it would be chosen for this function.

"Gracenote provides its CD and file recognition database, MusicID, to some of the leading automotive companies around the world, including DaimlerChrysler, General Motors, Honda, Infiniti, Lexus, Mitsubishi, Nissan, and Toyota. Gracenote solutions are used in production today by device manufacturers including Aisin, Alpine, Clarion, Denso, Harman/Becker, Kenwood, Panasonic, Pioneer, Sanyo, and Xanavi. To date, Gracenote's technology has been included in millions of advanced automotive entertainment units in Japan, and began shipping in North America in 2007."

What does everyone else think?

EDIT: If it is indeed QNX here is some background info on OS as well as file system support:
http://www.osnews.com/story.php/15272/What-Is-QNX/

 

I had an Audrey too... it's in the basement now. I was using it to run MisterHouse...

Pretty hackable actually... hmmmm...

 

Yep... same here. Used ACID and was running the web browser to connect to my home automation server.

I even have a couple of modules to my name in the MH developers site.

 

linux has support for QNX4 and 6 file system but it's read only. There's read-writable support for QNX4FS, but it's experimental and has known problems. Without access to an actual QNX development system, mucking with the image on the G's harddrive (assuming it is QNX) is going to be very non-trivial. Beyond just mucking with the filesystem, you'd probably have to screw with whatever QNX's boot loader is, so i imagine swapping a larger drive would be difficult. I wouldn't be surprised if beyond the OS itself though, the apps on it (nav, musicbox) all use their own database and storage system that will need to be reversed engineered. I don't know of any OS other than QNX that has full support for the QNX file system, but that doesn't mean it doesn't exist. What I don't know is alot

 

good luck. QNX is a highly proprietary RTOS (real time operating system) used in high availability applications (like a car's brains for example, or an emergency call center mainframe). very expensive software and very expensive tools.

 

old thread revival ... FFWD 4 years and QNX is the heart of RIM Blackberry devices.

 

Really sucks that there hasn't been any drive to mod the hard drives in this car. We can add a bigger size HD in a nissan gtr already or change the language to another. Both of these cars use the same system.