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| [[Synology NAS repair]] | | #REDIRECT [[publications:Garmin_GNS480_data_card]] |
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| =Garmin GNS480=
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| The GNS 480 is aviation’s first Gamma-3 WAAS-certified GPS/Comm navigator. It’s loaded with features and guidance capabilities that put it at the forefront of panel-mount navigation technology at the time of its release by Apollo as the CNX80 and subsequently purchased by Garmin 2003 and released as the GNS480 https://en.wikipedia.org/wiki/Garmin.
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| The database card started out as a 32 MB partition and has been subsequently increased to greater than 64 MB due to the increase in US data of:
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| * way-points,
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| * approaches,
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| * arrivals and
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| * departures.
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| The GPS uses a FAT16 formatted [https://es.wikipedia.org/wiki/CompactFlash|Compact Flash Card] which uses the partition serial number as the volume id, and is labelled with CNX 80.
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| An example GNS480 compact flash database card contains:
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| * partition: GUUID=78CD-C85D
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| * label: CNX 80
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| * contents :
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| System Volume Information/WPSettings.dat
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| System Volume Information/IndexerVolumeGuid
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| database/nav/XXX-YYY.bia
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| database/nav/XX-YYY.bib
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| upsat/info.dat
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| * optional contents
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| [feat_unlk.dat]
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| ==inspecting==
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| The card '''should''' be imaged for preservation and restoration in case something should happen to the Compact Flash card and the file system be damaged.
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| Plug the CompactFlash Card into your reader and look for the device (and take note):
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| * on linux
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| sudo fdisk -l
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| * obtain the volume id on Linux
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| sudo blkid
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| * or obtain the volume id on Windows
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| vol drive-letter:
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| ==backup and restore on linux==
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| * the image may be saved on linux (take care with '''if''' and '''of''' targets so you do not overwrite your original card while making the image) via:
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| dd if=/dev/SDFlash-device of=gsn480.img bs=4048
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| * the image may be restore on linux via e.g.
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| dd of=/dev/SDFlash-dev if=gns480.img bs=4048
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| Disclaimer: you do this at your own risk and responsibility.
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| ==backup and restore on Windows==
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| * use Win32DiskImager https://sourceforge.net/projects/win32diskimager/
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| Disclaimer: you do this at your own risk and responsibility.
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| =why=
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| This article was written because I had to restore a friend's data card for his aircraft. You should make a backup because these cards are not infallible and getting a replacement with the Garmin contents on them for a now unsupported system is like trying to find hen's teeth. His compact datacard was electrically destoyed because a pin bent over in the card-reader carrier that was being used to load Nav data to the card - but the card could have easily died due to old age. That card was mis-reporting its partition size and had a corrupted index and could no longer be read or written properly. So the former contents had to be found to build a new card - luckily the www community helped out as Garmin said they could not.
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| =Stop-press 2020-07-20=
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| I also had a Garmin G500 (Gdu620) sdcard fail last month. It was nearly 12 years old and suffering from too much insertion and removal.
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| Being in the IT industry I know that Flash and SdCards fail.
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| Make sure you have spare cards and you back them up because you never know when one is about to fail, and it will do so at an inconvenient time - like after you start the aeroplane and when you are about to embark on an IFR flight. Also have data subscriptions that let you re-load your current aircraft data once you obtain your replacement card.
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| I have backups for all my data cards in case I get stuck in the boon-docks. Even the cards for my operational raspberry-pi SBC systems, as well as backups of all my critical server partitions - which I store in one of my [[Synology_DS1515%2B_NAS_repair|NAS]] along with backups of my mediawikis and the source code repositories and all the other critical company information (even including this wiki is automatically backed-up - as are all the others - on encrypted drives).
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| =categories=
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| [[category:Reference]]
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| [[category:Index]]
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| [[category:Hardware]]
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| [[category:public]] | | [[category:public]] |
| | [[category:redirect]] |
