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Thread: Some queries about updating map data for a MIB2 (Discover Media Gen 2) system

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    Some queries about updating map data for a MIB2 (Discover Media Gen 2) system

    I have a few queries about updating the map data for my Discover Media Generation 2 (MIB2) system. I have asked some of the queries on the GOLFMK7 forum, but I have received no replies. I hope it is not considered an issue by asking the same questions here.

    1. The documented procedure for writing new map data to an SD card specifies that you should use 7-Zip to unzip the downloaded zipped files directly to the SD card. However, I would prefer to unzip the files to an empty folder on my Windows 7 system first and then copy the unzipped files and folders to the SD card. I have found a comment stating that this will not work for a reason which I don’t understand. And yet, I have found further comments which suggest that it will work. Can anyone state with certainty whether this will work or not?
    2. I have been experimenting by using 7-Zip to unzip the downloaded May 2017 zipped files into an empty folder on my hard disk. At the top level in this empty folder, a folder called "maps" is created along with a file whose name ends with "…md5sum.txt".

      However, if I look at the existing file structure on my SD card, there is only a folder called "maps" at the top/root level. There is no file whose name ends in "…md5sum.txt".

      Does the presence of this file at the top/root level of the SD card cause any problems? Or should it be deleted before using the card?
    3. My preferred strategy for updating map data is to have two SD cards. This would enable me to prepare new map data on one SD card but, if something goes wrong, I can always revert back to the working map data on the other card. (This goes back to my training as a computer software specialist. You don’t destroy a working version of a software system until you know that you have another working version to replace it.)

      Now, one SD card came with my new Golf 7. But I have been trying to find another blank “VW approved SD card” without success. According to my local VW dealer, I can purchase the latest set of maps (May 2017) on a new SD card for about £65, and I am seriously considering doing this. This would then give me the two SD cards that I need. When the November 2017 map data becomes available, I can then unzip the November 2017 map data onto my original SD card knowing that, if anything goes wrong, the SD card I bought still has the May 2017 map data in working order. So, as each set of new map data becomes available every six months, I simply alternate between the two SD cards.

      Will my Discover Media system accept two SD cards with map data, alternating in this way? At any one time of course, only one SD card with map data is in the SD card slot.
    2016 Golf Match Edition 1.4 TSI 125PS, DSG

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    Use the Discover app for Mac or PC to update the maps. Just take out the SD card, unlock it on the side, and update it using the software. It takes quite a while, but is all automated.
    2016 Golf Match Edition 1.4 TSI, 7-speed DSG

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    Quote Originally Posted by Benjamin Frost View Post
    Use the Discover app for Mac or PC to update the maps. Just take out the SD card, unlock it on the side, and update it using the software. It takes quite a while, but is all automated.
    Thank you for the reply.

    Yes, I am familiar with the DiscoverCare application that you mention, but I would prefer to use 7-Zip.

    I can now answer Question 3 in my original post. I was assured by a master technician at my local VW dealership that I can swap one “VW approved SD card” for another “VW approved SD card” at will. So I bought another “VW approved SD card” with the May 2017 map data on it, and I am now using that.

    I still don’t have answers to Questions 1 and 2. However, now that I have a second SD card with the latest map data, I can use the SD card with the old map data in order to experiment and find the answers to Questions 1 and 2.

    It might be useful to know though whether the DiscoverCare application also places a file whose name ends in "…md5sum.txt" at the top/root level of the SD card? Or does it only place a folder called “maps” at the top/root level?
    2016 Golf Match Edition 1.4 TSI 125PS, DSG

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    I am in a similar position in that my vehicle (2016 Polo GT) came with V4 software and I would like to update to the latest May 2017. Like TonyRC I would like to have a 'spare' card in case of issues with the download and trashing what is on the original. Confused by some posts elsewhere and the info from my VW dealership, who said it would work, I tried a bog standard SD card to take the download, no good. There are some VW cards available on auction sites with the same version as mine selling a lot cheaper than VW quote and I thought about purchasing and updating one of these. More confusion, as I read from other posts that 'once installed in a vehicle the SD card is then locked and cannot be used in another car.' Does anyone know the truth of this please.
    I also have that extra file when I download using 7zip which is not on the original SD card, so at the moment cannot answer to it's relevance.
    I would be interested to hear from others who may have gone through this, thanks.
    2016 Polo GT 1.4 TSI

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    Quote Originally Posted by tunesofglory View Post
    I am in a similar position in that my vehicle (2016 Polo GT) came with V4 software and I would like to update to the latest May 2017.
    ...
    I would be interested to hear from others who may have gone through this, thanks.
    I believe many others have tried to use an ordinary SD card for holding the map data, but I don’t believe anyone has succeeded. I suspect that the Discover Media system tests some for some data in a hidden, read only partition to determine whether it a “VW approved SD card” or not.

    I didn’t want to take a chance on buying a “VW approved SD card” on eBay, etc.. I was prepared to pay £63 at my local VW dealership for the peace of mind. If it didn’t work, I could easily take it back and complain.

    I had also read about an SD card being “locked” to a car once it is installed but I don’t see how that can happen (I am willing to be informed though). First of all, there is no installation as such. You just put the new SD card into the SD1 card slot, start Discover Media by switching on the ignition say, press the NAV button, and there are the maps on the screen. Secondly, you are advised to put the SD card into the SD card slot with WRITE LOCK on which means that, in theory, the SD card cannot be written to. So how can the SD card be “locked” to that car?

    Moreover, when I ordered the SD card at my local VW dealership, I was assured by the Parts Supervisor that the SD card is not tailored in any way to a specific car. The SD card I bought is a standard VW stock item that can be used on any car with Discover Media Generation 2 (MIB2).
    2016 Golf Match Edition 1.4 TSI 125PS, DSG

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    Thanks, I have messaged some of the sellers on ebay who offer V4 for about £20 and they do say they will refund if card is useless to me and that they have had no reports of others sold that do not work. So for that money I thought it may well be a punt. Like you I could not understand how the card could be retrospectively locked by the car.
    Have you overwritten the new software on your 'old' card yet, does it put that extra file on it?
    2016 Polo GT 1.4 TSI

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    Quote Originally Posted by tunesofglory View Post
    Thanks, I have messaged some of the sellers on ebay who offer V4 for about £20 and they do say they will refund if card is useless to me and that they have had no reports of others sold that do not work. So for that money I thought it may well be a punt. Like you I could not understand how the card could be retrospectively locked by the car.
    Have you overwritten the new software on your 'old' card yet, does it put that extra file on it?
    I would be interested to know how you get on with buying an SD card off eBay.

    No, I haven't overwritten the map data on my old card yet. For me, there is no urgency at the moment because I now have the May 2017 map data. So I plan to wait until the next version of the map data becomes available (November 2017?) and then overwrite it.
    2016 Golf Match Edition 1.4 TSI 125PS, DSG

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    I'll give it a go, so watch this space! Another confusion I have just thought of, there has been mention of a limit to the number of upgrades that the card will accept or a time limit of 3 years....have you come across this?
    2016 Polo GT 1.4 TSI

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    Purchased a 'used' card off Ebay, same part number, same version as my original and it works ok so will try a download of new maps when I get a chance.
    2016 Polo GT 1.4 TSI

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