LR5.7 showing corrupt blocks for CR2 files from my Canon 7D

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I made a Back up and started my iMac again, imported files from my Canon 7D CF-card and when files appeared they turned multicoloured mostly pink.
Tried to open from HD in PS as well but same colors still.
I ́m deaply worried since it is like a virus eating our raw-files..
Stein, Norway
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Tone Malm

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Posted 4 years ago

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Steve Sprengel, Champion

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The file does look corrupted.

You need to determine whether the data is corrupted on the card, already, or if it is being corrupted during the transfer or afterwards on your hard-drive.

One way to help determine this is to try a new way of transferring the exactly same photos and see if they show the exact same problems. If so the data on the card is bad, if the corruption is different or there isn't corruption the second time you transfer the images, then it is likely something in the transfer that corrupts the data.

Commonly the SD/CF card is going bad and the data is bad on the card, already. Less commonly there is a problem with the computer memory or computer hard-drive that corrupts the data after it is transferred onto the computer.
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Stein Nilsne

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2nd PC Dell and new cardreader Sandisk but same thing happens. My Lexar 128Gb 800x seems to be gone mad and bad..
Stein, Norway
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Stein Nilsne

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Tried again on my Dell PC and imported via LR 5.7.1 and one of the images turned out like this! New machine, new cardreader but same card. I'll make a second try via Bridge to see if same happens. Scary stuff!
Stein
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Stein Nilsne

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I downloaded them as dng via LR and only 6 out of 317 files were corrupted.
I guess from now on I'll download as dng and backup the CR2 on a second harddisk (more hardware :( )
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Steve Sprengel, Champion

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Converting to DNG is not a solution to the corruption.

It is likely that re-downloading caused things to work differently

Check the CR2 files that correspond to the 6 corrupted DNGs and see if they have the same corruption or not?
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Stein Nilsne

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As you see one of the "Bird-on-pole-photos" came out different than the original published here, I have sent Adorama a note for returning the CF to Lexar. But I need an instant back-up of the originals - me and my wife takes 30K photos a year and this can not happen in future. Guess dng + CR2 is not an bad idea anyway.
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Steve Sprengel, Champion

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The bird-on-pole photo IMG_7220 is not even in the list of DNG thumbnails so it's not clear that there are actually fewer bad photos when converting to DNG or if most of the very bad ones were just filtered out by LR ignoring them or your deleting them prior to import.

It probably will happen again at some point because hardware does fail eventually. Maybe you can get a camera that can be configured to write the same image to two different memory cards so if a photo is bad on one, it might be ok on the other. You can also keep track, somehow, of how many photos have been written to each memory card and throw them away after a time--not sure how long--so they don't ever get a chance to go bad. If you have some idea how many have been written to the current memory card and then divide that number in half and use that as your throw-away-after number.

To me it would seem better to have a CR2 and a backup CR2 not a DNG and a CR2, but you can do whatever you want.