repair corrupt raw

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  • Updated 1 year ago
Are there any tools for repairing corrupt RAW .dng files? I have many .dng files that are the proper file size, but are corrupt according to the latest versions of Lightroom and Photoshop. I've run disk utility apps on my drives which are healthy, but am not able to open these corrupt files. 

If there's not a utility for RAW file repair, I would like to suggest creating one if possible.
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Jim Newberry

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Posted 1 year ago

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Roelof Moorlag

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I do not know of such a tool. However Lightroom does provide a validation check on DNG files so you can be sure youre files are not corrupt. When at some moment the DNG validation shows you one of more DNG's that are corrupt, than you have time to replace them with one of your backups.
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Jim Newberry

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Thanks for the reply Roelof. I have been using that validation tool more lately. In the case of the corrupt files I have, I know they were good after import and dng conversion, because some are cropped and have development adjustments I've made. And I do have all my photos backed up, but unfortunately I synced hard drives at one point so the backups are corrupt too. 

My corrupt .dng files are about 25mb each, there's some kind of data in there, would be great to restore them some day...
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Roelof Moorlag

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Because of the risk off transfering corrupt files to the backup i do the dng validation before each backup. Did you tried datarescue software from lexar, SanDisk or so already?
(Edited)
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Jim Newberry

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That's a good idea, from now on I'll validate dng's before backing up/syncing. 

I have tried Datarescue with no luck. I've looked into other similar applications, but most seem to work by scanning drives for missing files; I was hoping there would be an app that would repair existing files. 
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Roelof Moorlag

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I hope someone else is stepping in with experience in repairing corrupt DNG's.

Do you have an idea how many of your images are affected?
If not, you could use the free DNG converter from Adobe to make another set of DNG's from your present ones. The converter shows you a report with the items it could not convert. Of course you dont' have to save this second set of images.
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Jim Newberry

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I have at least a hundred corrupt .dng files, probably a few hundred.