On Mon, Aug 30, 2010 at 4:53 PM, Greg Troxel <gdt@ir.bbn.com> wrote:
I just got a garmin oregon 450 (for hacking OSM/mkgmap). It attaches as two disks (internal flash and uSD slot): [...] But, there is apparently no MBR partition table: [...] A mac reads the filesystem just fine, but didn't obviously tell me what it was. I hear it works on Linux.
Has anyone managed to read this with free software? Could they describe the type of filesystem and layout, and why there's no MBR partition table?
The internal flash in my Oregon 300 is not partitioned but has a standard VFAT filesystem on the raw drive. It "just works" on my Linux systems (Fedora) and the few times that I've plugged it into a Windows system it has worked just fine there too.
I can report that the OSM img files I built with mkgmap work pretty well; you can just drop osm.img from mkgmap output on the flash in Garmin/. The map display is subdued (vs the harsh but easy to absord etrex), and that's making me more inclined to play with TYP files, although I lack the Copious Spare Time.
Without using a TYP file some things can be hard to tell apart, for example buildings from parking lots but it works. I haven't had the time to mess with TYP files either. -- Jeff Ollie