Lightroom Classic: DNG of 2007 not readable anymore

  • 1
  • Problem
  • Updated 6 days ago
  • (Edited)
Using Lightroom since its earliest Beta. When going though my files, I discovered that several files in the catalogue are listed, but corrupted:
  • The picture shows with an exclamation mark in the Library module
  • When I try to develop the file, LR classic (8.3.1) can not open the file and replies that the file might be corrupted
  • Importing into Lightroom CC does not work either
  • The files are still in the folder, and show the JPG preview
Questions:
  • Is there a way to check the integrity of the files?
  • Is there a way to recover the file content? 
Background
  • DNGs were created by LR (of that time, with regular catalog updates)
  • Camera was a Canon Rebel SLR.
Link contains example foto on google drive
https://drive.google.com/open?id=1vFtdwvlkQvCaEAmaAoXz2UNzdSmIZw1E 

KR Timmo
Photo of timmo.sturm

timmo.sturm

  • 3 Posts
  • 0 Reply Likes
  • horrified...

Posted 6 days ago

  • 1
Photo of Yves Crausaz

Yves Crausaz

  • 375 Posts
  • 58 Reply Likes
Bonjour, je viens de faire l'exercice sur macOS à jour et dernière version de LR Classic avec votre .dng, importation ok, mais utilisation lorsque je souhaite l'ouvrir avec PS :



Hello, I just did the exercise on macOS update and latest version of LR Classic with your .dng, import ok, but use when I want to open it with PS

So, I do not know what happened.



Photo of timmo.sturm

timmo.sturm

  • 3 Posts
  • 0 Reply Likes
Hi Yves,
thanks for your help. It seems to affect only a limited number of photos over a certain timeframe. I suspect that the programs still can read the embedded jpg (possible for me as well), but not more. Just running an entire scan with LR.
Best Timmo
Photo of Eric Chan

Eric Chan, Camera Raw Engineer

  • 627 Posts
  • 132 Reply Likes
Hi Timmo,

I studied the image that you posted, and unfortunately it indeed appears to be corrupted.  The compressed image stream has bit errors, which is causing Lightroom to report the errors you are seeing.  (I used internal diagnostic tools to determine this.)  Are the various images that are corrupted contained on the same drive?  How old is the drive?  It seems to me that the drive may be going bad and developing these errors.  Unfortunately I don't have a suggested remedy for you, aside from checking your backups/archives to see if you have an uncorrupted copy there.  You may also want to move your other images to another drive as soon as possible.

Eric
Photo of Eric Chan

Eric Chan, Camera Raw Engineer

  • 627 Posts
  • 132 Reply Likes
By the way, the reason you can still see the JPEG previews in this file is because the embedded JPEG preview is stored in a different part of the file, and that part does not appear to have the problem.
Photo of timmo.sturm

timmo.sturm

  • 3 Posts
  • 0 Reply Likes
Hi Eric,
thx a lot. I remember that I had once a corrupted drive and thought I was able to rescuse some files - the files are 11 years old, and moved two times (at least). So it might be a long "non-detected" problem. Thx for your help
Timmo