this post was submitted on 12 Sep 2024
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Do optical disks degrade if protected from the elements? A stack of Blu-ray disks could store quite a bit.
The commonly used optical disk technologies degrade over time. CD-RW more rapidly than CDR. It's even worse for higher-density media.
And for bigger data sets, the capacity isn't there. And writable media is getting more rare. Probably because of the same reason.
Depends on the disk technologies.
CDs are prone to flaking, otherwise most disk are suspectible of oxidation (disk rot) if stored improperly. M-Disk is a long-life variant of both DVDs and Blu-Rays, although more expensive. However, write-once disks are very ransomware-resilient, and I recommend to add a write-once media to any proper backup setup.