<p dir="ltr">Agreed. I don't have the m-disk setup yet but the US Navy was rather happy with the accelerated lifetime test results.</p>
<div class="gmail_quote">On Oct 29, 2015 9:06 AM, "Alex Carver" <<a href="mailto:agcarver%2Bale@acarver.net">agcarver+ale@acarver.net</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">That's all consistent with my own experiences, too. But in accelerated<br>
lifetime testing there's a significant variance in lifetime probably<br>
owing to production quality and defects between and within manufacturers<br>
and maybe even, to a lesser extent, on the burn quality from the drives<br>
themselves.<br>
<br>
The current opinion is that they're not reliable enough on a consistent<br>
basis for long term (>50 year) archiving of data.<br>
<br>
On 2015-10-29 04:13, Jim Kinney wrote:<br>
> +1<br>
><br>
> I have CDs I burned 15+ years ago that are perfectly fine. They are stored in cool temps and away from UV light. I have a cd burned a year ago that sat near a window and is unreadable. It was a temp need so nothing was lost. Storage of burned optical media is the key to their longevity once the media quality is stable.<br>
><br>
> On October 29, 2015 3:29:13 AM EDT, Steve Litt <<a href="mailto:slitt@troubleshooters.com">slitt@troubleshooters.com</a>> wrote:<br>
>> On Wed, 28 Oct 2015 22:09:32 -0700<br>
>> Alex Carver <<a href="mailto:agcarver%2Bale@acarver.net">agcarver+ale@acarver.net</a>> wrote:<br>
>><br>
>>> On 2015-10-28 20:53, Ken Cochran wrote:<br>
>>>> Given the long-term lack of life expectancy of DVD & Blu-Ray<br>
>>>> recordable media, what about M-Disk? Any experience(s)?<br>
>>>> Good? Bad? Middlin'? How does CD-R hold up over time?<br>
>>>> Anything "good" in those? Thanks, -kc<br>
>>><br>
>>> I believe M-Disk is one of the technologies being evaluated by the<br>
>>> Library of Congress.<br>
>>><br>
>>> CD-R (aluminum layer) decays, too, if the lamination between the two<br>
>>> halves opens up and exposes the layer to air. Dye based CD-Rs decay<br>
>>> in a short period of time, too.<br>
>><br>
>> The repeated talk of quick CD/DVD decay just doesn't match my<br>
>> experience. See this:<br>
>><br>
>> <a href="http://troubleshooters.com/lpm/201408/201408.htm#he_who_laughs_last" rel="noreferrer" target="_blank">http://troubleshooters.com/lpm/201408/201408.htm#he_who_laughs_last</a><br>
>><br>
>> I've stored my backups as tarballs (and earlier as .zips) on optical<br>
>> media since before the turn of the century, and I don't remember any<br>
>> case of a CD or DVD backup that tested right on backup, and didn't test<br>
>> right years later.<br>
>><br>
>> All I do is keep the backups in a wooden rolltop box on a shelf.<br>
>><br>
>> SteveT<br>
>><br>
>> Steve Litt<br>
>> October 2015 featured book: Thriving in Tough Times<br>
>> <a href="http://www.troubleshooters.com/thrive" rel="noreferrer" target="_blank">http://www.troubleshooters.com/thrive</a><br>
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