For discs left hanging on a tree for nearly a month in various weather conditions, I’m actually quite surprised how well some lasted.
We had gale force winds yesterday which brought down some discs. A few discs were obvious duds, one generic disc which snapped in two and a “Spacewalker” brand disc that was mostly transparent.
As most of the discs were already coasters and firmware update CDs (e.g. <10MB of data), I was only able to find one that had a fair bit of data, i.e. CD-R with Bart PE, written June 2008 going by the custom folder dates on the disc:
MID: 97m27s18f (Plasmon Data Systems)
This CD-R is an inkjet printable with no branding that I could see.
I suspect the Verbatim CD-R’s would have been readable had they had more data to run a disc scan on. But then again, there’s still more discs (and plus) waiting to ripen.