December 4, 2004

Exif Untrasher

Alla came back from her Thanksgiving vacation in Philadelphia, and found out that the same memory stick the got corrupted last time after her Europe trip was corrupted again. All the files had been lost. Last time, I was able to recover them by running fsck_msdos and recovering the lost files. But this time, the FAT was clean. So recovery needed to be done off the raw data.

I found a web page that describes the Exif file format. This is the format her Sony CyberShot camera saved the images in. So, I have the capability of reading the raw data (I made an image of the partition using hdiutil) using HexEditor or through a small program and saving the found images back to disk.

But even better! Someone had already written a really simple application to do that, with additional support for special devices. Exif Untrasher did exactly what I would have had to do. There are lots of commercial programs that do exactly this, and can cost a decent amount. But the solution is so simple, I'm surprised no one has made their source code available. I may do that at some later point.

Posted by josuah at December 4, 2004 6:47 PM UTC+00:00

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