[ale] Backup large files to span DVDs

[Jim Kinney]

Agreed. I don't have the m-disk setup yet but the US Navy was rather happy
with the accelerated lifetime test results.
On Oct 29, 2015 9:06 AM, "Alex Carver" <agcarver+ale at acarver.net> wrote:

> That's all consistent with my own experiences, too.  But in accelerated
> lifetime testing there's a significant variance in lifetime probably
> owing to production quality and defects between and within manufacturers
> and maybe even, to a lesser extent, on the burn quality from the drives
> themselves.
>
> The current opinion is that they're not reliable enough on a consistent
> basis for long term (>50 year) archiving of data.
>
> On 2015-10-29 04:13, Jim Kinney wrote:
> > +1
> >
> > 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.
> >
> > On October 29, 2015 3:29:13 AM EDT, Steve Litt <
> slitt at troubleshooters.com> wrote:
> >> On Wed, 28 Oct 2015 22:09:32 -0700
> >> Alex Carver <agcarver+ale at acarver.net> wrote:
> >>
> >>> On 2015-10-28 20:53, Ken Cochran wrote:
> >>>> Given the long-term lack of life expectancy of DVD & Blu-Ray
> >>>> recordable media, what about M-Disk?  Any experience(s)?
> >>>> Good?  Bad?  Middlin'?  How does CD-R hold up over time?
> >>>> Anything "good" in those?  Thanks, -kc
> >>>
> >>> I believe M-Disk is one of the technologies being evaluated by the
> >>> Library of Congress.
> >>>
> >>> CD-R (aluminum layer) decays, too, if the lamination between the two
> >>> halves opens up and exposes the layer to air.  Dye based CD-Rs decay
> >>> in a short period of time, too.
> >>
> >> The repeated talk of quick CD/DVD decay just doesn't match my
> >> experience. See this:
> >>
> >> http://troubleshooters.com/lpm/201408/201408.htm#he_who_laughs_last
> >>
> >> I've stored my backups as tarballs (and earlier as .zips) on optical
> >> media since before the turn of the century, and I don't remember any
> >> case of a CD or DVD backup that tested right on backup, and didn't test
> >> right years later.
> >>
> >> All I do is keep the backups in a wooden rolltop box on a shelf.
> >>
> >> SteveT
> >>
> >> Steve Litt
> >> October 2015 featured book: Thriving in Tough Times
> >> http://www.troubleshooters.com/thrive
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