Tag Archives: #read error versus write error

Write Error? No!

Working with my Lumix LX7 last month, I made a variety of photos of St. Lawrence & Atlantic 394 coming down from the border crossing at Norton, Vermont.

When I first attempted to download the SD card from the Lumix, I noticed a serious problem with several of my files.

Portions of the files suffered from corrupted data, with large portions of the image area scrambled.

However, when I viewed the photos in camera, there was no sign of this problem.

Normally, I take the SD card out of the Lumix and used a card reader to couple the card to my MacBook Pro. Then I download the files using a program called ‘Image Capture version 8.0’. Once downloaded, I then upload select images into Lightroom. This saves the files which creates a secondary backup, while allowing me to organize the photos and make scaled and corrected copies.

After a bit of fussing, I decided that what I had suffered wasn’t a write error to the card (which is a very serious problem), but rather a card read error. In otherwords all the information was safely stored my SD card and it was getting corrupted during the downloading process.

What, I ended up doing was using Lightroom to download the card directly. Then I used Lightroom to output my originals in DNG format which I stored in a folder along with the rest of my August Lumix files.

Below, I show the corrupted files as I original saw them (scaled for internet), then the unadjusted DNG files (scaled); and finally my adjusted DNG files.

The lesson: don’t panic if you suffer from corrupted files. Your data may still be recoverable. [Just don’t erase or format the card.]

Corrupted file from my initial download using a card reader an Image Capture 8.0
Unaltered file uploaded using Lightroom and exported in DNG format for archiving then converted to JPG for internet display.
Adjusted DNG file using Adobe Lightroom, scaled and exported as a JPG for internet display
Corrupted file from my initial download using a card reader an Image Capture 8.0
Unaltered file uploaded using Lightroom and exported in DNG format for archiving then converted to JPG for internet display.
Adjusted DNG file using Adobe Lightroom, scaled and exported as a JPG for internet display

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