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Re: Online backups

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Scott Alfter <scott@alfter.diespammersdie.us> wrote:
> In article <lvfpbe$73i$1@dont-email.me>, Rich  <rich@example.invalid> wrote:
> On the topic of bit rot, it's worth noting that BD-R, at least in its
> original formulation, doesn't use dye in its recording layer.  Instead, it's
> a metal layer whose reflectivity changes when the laser melts it:

Thanks for pointing this out.  I had not kept up with the BD-R world,
and simply assumed that because both CD and DVD recordables used a dye
layer, that the same tech. had simply been carried over.  And your
reference to LTH implies that some makers are trying to "just carry it
over".

But that does seem like it should make BD-R bit-rot resistant, at least
to the same sort of bit-rot that plagues DVD-R and CD-R disks.

There could still be other factors that might make BD-R rot bits, but
at least with a melted metal alloy substrate, dye breakdown is not one
of those factors.

> I'd recommend avoiding BD-R LTH for archival purposes.  You're not
> going to save that much money.  BD-R HTL & dvdisaster might be a bit
> of a belt-and-suspenders approach, but when it's (for instance) your
> wedding photos on the line, the extra security is worth the minimal
> extra cost (5 discs vs. 4).

True.  Although for the wedding photos, it's not a bad idea to also
periodically just create another set of 5, just to be sure....

I could look it up, yes, but, what is the typical per disk cost of a
BD-R HTL disk?

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Online backups Chris J Dixon <chris@cdixon.me.uk> - 2014-09-17 08:24 +0100
  Re: Online backups scott@alfter.diespammersdie.us (Scott Alfter) - 2014-09-17 15:44 +0000
  Re: Online backups "RS Wood" <rsw@therandymon.com> - 2014-09-18 06:36 -0500
    Re: Online backups Rich <rich@example.invalid> - 2014-09-18 11:55 +0000
      Re: Online backups RS Wood <rsw@therandymon.com> - 2014-09-18 13:31 +0000
        Re: Online backups Rich <rich@example.invalid> - 2014-09-18 23:20 +0000
          Re: Online backups Will Honea <whonea@whonea.net> - 2014-09-18 18:37 -0600
          Re: Online backups Paul Sture <nospam@sture.ch> - 2014-09-19 13:14 +0200
            Re: Online backups Will Honea <whonea@whonea.net> - 2014-09-19 12:51 -0600
          Re: Online backups scott@alfter.diespammersdie.us (Scott Alfter) - 2014-09-19 15:43 +0000
            Re: Online backups Rich <rich@example.invalid> - 2014-09-19 18:50 +0000
              Re: Online backups scott@alfter.diespammersdie.us (Scott Alfter) - 2014-09-19 21:43 +0000
      Re: Online backups scott@alfter.diespammersdie.us (Scott Alfter) - 2014-09-18 17:06 +0000
    Re: Online backups scott@alfter.diespammersdie.us (Scott Alfter) - 2014-09-18 16:27 +0000
  Re: Online backups Roger Blake <rogblake@iname.invalid> - 2014-09-19 16:31 +0000
    Re: Online backups Chris J Dixon <chris@cdixon.me.uk> - 2014-09-20 08:03 +0100
      Re: Online backups Roger Blake <rogblake@iname.invalid> - 2014-09-22 16:34 +0000
        Re: Online backups Chris J Dixon <chris@cdixon.me.uk> - 2014-09-22 19:28 +0100

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