this post was submitted on 25 Nov 2023
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Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ
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Don’t bother with M-discs. They only provided a meaningful advantage in the DVD era. I’ve researched this a bit myself and consensus at least in the data hoarding community is use 2 Blu-ray Discs from two different batches (bought 6 months apart). Which still comes out cheaper or the same as branded M-Discs. (Though that may be overkill and truth be told as long as you test the disc and it’s data done months after writing you’ll tend to catch any rare bad ones)
Truth is, quality Blu-ray Discs have all the features that would engender M-disc type longevity in the design spec. Just make sure they’re not low to high (LTH) discs which are inferior but always marked as such at least.
Don’t get no-name cheap ones either, get Verbatim, Sony, some other good Japanese brand. For Verbatim specifically their discs marked MABL on the package are better.
Always burn data at lower speeds too, less errors.
Doesn't help the fact that the discs degrade over time.
From my own experience, if they do it's undetectable over several decades. The only discs I lost were scratched CDs, and only where the scratches were at the start area; for mid-scratches the extra parity data recovered a fair amount of it. Discs that were stored in wallets and handled carefully and just sat in a drawer the rest of the time are still perfectly fine all these years later.
I haven't kept up with BR but with DVD, that wasn't true. For a particular burner and media you could find a sweet spot of minimal PI/PO errors. For my 16x dvd burner with verbatim media, that was 4x speed.