Cautionary Tale, data loss.

Discussion in 'Maps and Routing' started by David Halliwell, Aug 16, 2016.

  1. David Halliwell

    David Halliwell

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    TomTom Model(s):
    720 go, TT Rider
    On Mon 18 th July, I lent my TT 720 GO, complete with Florida card to my brother in law for his holiday to Orlando scheduled for 21st July. On that same Monday, I showed him how to switch maps from Western Europe to US. I left the unit in US map mode, showing him all the previous Orlando addresses from a previous trip, including the address of his forthcoming villa which I had previously installed. He arrived in Orlando 3 days later, switched on the unit.......no US map. When he went to Switch Maps, no sign of US, only Western Europe, which is in the 720 memory ( not on a card ).
    No amount of searching through the unit would reveal the US map. On his return, I placed the card into my PC card reader. Sure enough, in the card menu was the title ' US South East Region' When I clicked on,........'This File is Empty'. Tried the card in a separate card reader....same result. So,.... somewhere between home (UK) and Orlando car hire, card has been wiped. This card and TT device has been to Orlando and back on two previous occasions with no issues.
    Correct me if I am wrong, but I don't think SD card data can be erased from the TT device even accidentally, so I can only assume it happened at airport security.
    I'm off to Orlando at Christmas, so my new card and data will be staying in my pocket and going through the metal detector rather than the X-ray.
     
    David Halliwell, Aug 16, 2016
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  2. David Halliwell

    canderson Moderator

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    Have never seen a Nav2 device wipe an SD card, no. Nav2 didn't have the ability for card formatting the way the more recent generations have, and even then, they'll ask you about formatting when you insert a new card that hasn't been used in a Nav3 or Nav4 TomTom device.

    There have been rumors over the years of airport security taking out an SD card, but most of it is anecdotal and extremely rare. It is, after all, ionizing radiation, and older equipment was a bit more powerful than what they're using now. In addition, one would need to be unlucky enough to have a flipped bit result from the exposure, and then even more unlucky in having exactly the wrong bit get flipped in a directory structure. A hit to the data to any single file wouldn't be an issue.
     
    canderson, Aug 16, 2016
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  3. David Halliwell

    David Halliwell

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    TomTom Model(s):
    720 go, TT Rider
    So what do you think the likely cause is? The map has vanished between the UK and Orland airport car hire.
     
    David Halliwell, Aug 16, 2016
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  4. David Halliwell

    canderson Moderator

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    No idea. Have seen very rare issues where card data was damaged if inserted when device was powered. Would be interesting to run one of those 'recovery' programs on the card that are often used to retrieve photos.
     
    canderson, Aug 19, 2016
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