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Re: Online backups

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RS Wood <rsw@therandymon.com> wrote:
> On Thu, 18 Sep 2014 11:55:10 +0000 (UTC)
> Rich <rich@example.invalid> wrote:

> > RS Wood <rsw@therandymon.com> wrote:
> > > But my pictures and movies I burn to DVDs or CDs every few months,
> > > each time starting from the present and going back as far as I can
> > > while still fitting on the disk. That way there's always some overlap
> > > and multiple disks have part of that overlap, affording me some
> > > redundancy.
> > 
> > For additional redundancy on the DVD's/CD's, you might consider
> > Dvdisaster (http://dvdisaster.net/en/index.html) as well as your
> > current "overlapping" process.

> Yes, Scott mentioned it above and it caught my attention.  I'm going to
> have to take some time to figure it out, but I'm already interested.
> Thanks for providing a link.

Your welcome.  It uses part of the storage space on the disk
(configurable) to store reed-solomon error correcting data such that a
percentage of the disk can be unreadable and yet you can still recover
all the data you wrote to the disk.

It also handles the "recovery" process should you need to recover a
disk.

It is to help against the "disk-rot" effect that plagues so many
writable optical media.  Over time, the dyes "rot" away sufficiently
that you can't read everything from the disk anymore.  Thankfully, for
disks where this does happen, it is usually a slow process and happens
for only small parts at a time.  So provided you test read the disks
occasionally, you can recover from rot before all it lost.

Or at least that is the intent.  If you never ever test the old disks,
you'll never know if they are readable or not, until you need them, and
then, if the answer is not, you end up stuck.

> Hell, at less than $1 per disk these days it's not even that much
> money.

It is also just about your only option beyond building a raid array
backup server to do backups of todays datasets when one is usually on
dialup (you've mentioned your dialup situation before).  Online backup
is just not an option at dialup speeds.

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Thread

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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