The original post: /r/datahoarder by /u/7dsfalkd on 2025-07-29 11:25:29+00:00.
Some time ago, CMC changed the mixture of their MDISC BD-R's. The material was visually different, and the media ID's also changed. It generated some controversy, also here on reddit.
In order to find out about the reliability of these discs, I took two standard BD-R's (CMCMAGBA5), two MDISC BD-R's (VERBATIMe), and two DVD+R's (MCC 004), burned data on it (Pioneer BDR-UD03) and put them outside exposed to the elements for about four month.
The result was that the DVD+R's and standard BD-R's were literally physically destroyed, the carrier material just vanished.
The MDISC's looked better, but unfortunately none of them could be read anymore. The drive gave an error "unknown media".
That experiment really made me reconsider my backup strategy, and I cannot really trust optical media anymore. What are your thoughts/back strategies?
you can read more about the experiment including some picture here https://umij.wordpress.com/