Thread: How to backup Nuvi NV (region41) with sd

I've just noticed your post [Only registered and activated users can see links. ]. Seeing you've been able to use the Ldr.bin for HWID 3433 to dump regions, it may be possible to fully convert to HWID 3433 by flashing an RGN file in preboot or use xrgn commands to flash the BIN components. The "K" version limiting the use of TT15 collars may then be overcome. There's still always the chance you'll brick it of course so all risk is yours naturally. Best to compare the fw_all 14.bin and logo 16.bin from the fw with the ones you've dumped, i'm tipping there will be some difference ... most likely in the logo region (decimal 16/hex 0x10). Use a hex reader or compare hashes.

I did backup for all regions on Alpha 200i K few hour ago.

There are backup just for regions 5,12,14,16,34,43,45,48,83,144,152,154 and 180.

I have error message for regions 3,10,17,19,21,44,46,49,50,51,74,75,76,77,90,93,99,100,102,123,131,134,135,136,166,245 and 248.

I have message "Success" for all other regions from 1-255, but they have 0 byte size.

I hope that this informations are useful for somebody.


@Butters Thank you for help again!

The command format is incorrect. You have two extraneous spaces, one after rrgn and one after the colon. Also it should be a comma after region number not a period (full stop). e.g. You've written:
"rrgn, 41.1: /41.bin" and it should be:
"rrgn,41,1:/41.bin"

Other things to check:

• Do you have Ldr.bin and correctly named update.txt (NOT updater.txt) in HWID folder?
• If there's a file named "last_id.bin" in HWID folder you must remove it. Try placing an empty file named update.log in there (make one with Notepad).
• Do you have correct naming of HWID folder (use same HWID as that of the Ldr.bin in it)?
• Do you have correct folder layout? Garmin\Updater\xxxx where XXXX is 4 numerals of HWID, e.g. US/EU firmware version zumo 595 has 2436
• Try a different microSD card, some don't work in some device even if they work in other Garmins.

Etrex 32x HW=4333 SW=2.80

List of "dumpable" regions:

Code:

Please Login or Register to see the links

Regions 41 and 154 are missing!

@Vadimk
Are you sure they are actually missing, perhaps rather they're protected against copying?

Originally Posted by Butters

Are you sure they are actually missing,

Code:

Please Login or Register to see the links

Originally Posted by Butters

perhaps rather they're protected against copying?

I suspect that "NV configuration" role is now played by region 13 (0x0D), 2MB in size.
It, like regions 41 and 154 before, contains UnitId and references to maps installed in the device.

Originally Posted by VadimK

I suspect that "NV configuration" role is now played by region 13 (0x0D), 2MB in size.

Likely your suspicion is valid.

It, like regions 41 and 154 before, contains UnitId and references to maps installed in the device.

Is rgn13 encrypted like the NV region of modern automotive devices and did you need to de-crypt to see UID etc.?

Originally Posted by Butters

Is rgn13 encrypted...?

No, region 13 is not encrypted.

Spoiler: Approximate structure of region 13:

Code:

Please Login or Register to see the links

Spoiler: attached

[Only registered and activated users can see links. ]