Why we do this work…

There aren’t many rewards in a discipline that is about taking the long term view but occasionally something comes up that you can take some pride in.

Last month, Ed Summers put out a call on Mastodon: digipres.club where he was wrestling with a CD-R format that was difficult to recognize. The disks likely held precious data belonging to his late brother.

Much of the search area had already been examined and narrowed down by folks in the community, including Misty de Meo, Roxi Ruuska, Ethan Gates, and Johan van der Knijff who all contributed suggestions and analysis..

Ed was able to share a copy of one of his disk images, and I had some time that I could dedicate to taking a look as well.

Long-story short, we were able to identify the disks, and Ed has written up the background here: https://inkdroid.org/2026/06/12/tascam/

The situation might be familiar to others: a digital file that isn’t recognized by the major file format identification tools, and yet, because of its context, you know it is something that might be important.

I have different experiences with these types of files, sometimes they are valuable (and you want to look after them), sometimes they are not (and it can still benefit you to get rid of them). The process of finding this out often follows a similar path.

In this instance the files turned out to be incredibly valuable and I wanted to elaborate on the path of discovery. Even though it really isn’t very sophisticated, I hope it will be helpful to those with unidentified digital records who might find the task of identifying them quite daunting.