How to backup Nuvi NV (region41) with sd

**kunix** · 21st August 2013, 08:00 AM

mong736
Error: invalid command 'rrgn' indicates that rrgn string was not recognized as one of the command strings.
If path 1:/reg_41.bin were not accessible, it would print only Error.
This looks quite weird. Can you upload your update.txt file? And also the boot.bin?

**mong736** · 21st August 2013, 01:13 PM

Originally Posted by kunix

mong736...

Attached are the boot.bin and update.txt files
BTW, my HWID is 1521 according to RGN_Tool v0.84

**kunix** · 21st August 2013, 01:33 PM

Believe me or not, this boot.bin doesn't support rrgn command at all (I'm not just guessing, I've disassembled it a little bit).
So you can't dump regions from this device

I wonder what's so important could be inside your device that Garmin doesn't want us to dump? Or maybe they're just closing security holes...?

**catymag** · 21st August 2013, 01:36 PM

Not nice

I'll add this info in starting post.

**mong736** · 21st August 2013, 01:39 PM

So mean no way I can backup my Nuvi NV?
Actually, my device is working well. Just want to backup this file to be safe.

**kunix** · 21st August 2013, 01:46 PM

Yes, most probably you can't do it. Unless some other dumping command is found. But this is not likely to happen.

**mong736** · 21st August 2013, 02:09 PM

ok. thanks. think i better not to tweaks around with this device too much in case anything go wrong.

BTW, does this mean that i cannot clear non vol in Debugging menu or hard reset the device if anything goes wrong?

**kunix** · 21st August 2013, 02:20 PM

Originally Posted by mong736

BTW, does this mean that i cannot clear non vol in Debugging menu or hard reset the device if anything goes wrong?

No it doesn't, as boot.bin's rrgn functionality has nothing to do with what you've just listed.
But clear non vol and hard reset are much weaker than restoring backups with rrgn/xrgn sequence.