![]() On NOV 2011 I burnt a Blu Ray disc with episodes of a TV series and also included an MD5 hash test file. Since 2011 I've been trying out a similar test on a Blu Ray disc. Several years ago now I tested the longevity of writeable DVDs and found that DVDs exposed to daylight and sun for 3 months on a windowsill became completely corrupt. How well do they withstand light? petersmart (2014) ran a test: Verbatim sells a type of Metal Nitride-based Blu-ray discs. The researchers recommend to use normal HTL Blu-ray discs and rated those of Sony and Panasonic as most reliable." Metal Nitride Blu-ray discs It seems that if you want to store your data for a long time, these should be avoided. The tests revealed that the overall quality of Blu-ray LTH discs is worse than normal Blu-ray (HTL) discs. However, this may not be the case for LTH discs.Īldershoff (2012): "In this test they tested LTH Blu-ray discs from Verbatim and JVC and it seems the claims from the manufacturers are not valid. Kpmedia (2010) explains that while CDs and DVDs typically use organic dyes, HTL Blu-ray discs are "primarily based on inorganic dyes", which don't degrade with exposure to light. ![]() Blu-ray discs can be one storage method, alongside cloud storage, hard drives, and/or something else. Ideally you should back up data in more than one way, in case one format fails. Lrq3000 (2015-2018) likes using optical disks for archiving "because it decouples the storage medium and the reading hardware (eg, at the opposite we have hard drives, which contains both the reading hardware and the storage medium, so if one fails, you lose both) and because it's most likely future-proof (you only need a laser, which is universal, the laser's parameters can always be tweaked)." ![]() tsesow (2017): "Blu-ray is the still the most stable media available with 50+years lifetime". There are several ways to store data for long-run archiving that make sense in different contexts. ![]()
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