[wplug] Online Backup

[Bill Moran]

Rick Reynolds <rick at rickandviv.net> wrote:
>
> Are you thinking of rar and unrar?  I'm pretty sure I've seen them  
> used with external parity files.

rar and unrar aren't what I'm thinking of, and I don't know their
capabilities.  There's not reason there couldn't be multiple apps
that can accomplish this, though.

> On Oct 13, 2007, at 4:05 PM, Bill Moran wrote:
> 
> > Patrick Wagstrom <pwagstro at andrew.cmu.edu> wrote:
> >>
> >> Zach wrote:
> >>> On 10/12/07, Teodorski, Chris <teodorski at ppg.com> wrote:
> >>>> CD's sure, but what is the shelf life of a burned CD (maybe 5 years
> >>> at best) and I
> >>>> hear the same is true for DVDs.  I wonder how many parents are  
> >>>> unaware that a
> >>>> burned CD isn't like a "pressed" CD and 7 years from now when  
> >>>> they go
> >>> to look at
> >>>> the photos of their little bundles of joy are going to be  
> >>>> shocked to
> >>> discover some
> >>>> or all are unreadable.
> >>>
> >>> Wow I didn't realize this! So all my data CD's will be gone in 5
> >>> years?! UGH NOOOOO!
> >>> How can I backup my data so it will be around for a long time? I  
> >>> don't
> >>> mean online backup, I need something I can do myself at home.
> >>
> >> Just to clarify, it doesn't 100% mean that all of your data will  
> >> be gone
> >> in 5 years.  Back in 1996 I spent way too much money as a high school
> >> student to buy a CD Burner.  I still have some of the first CDs I  
> >> burned
> >> using that machine (when a blank CD would cost about $15-$20 and you
> >> needed to ask at the special service desk at CompUSA for them),  
> >> and my
> >> testing shows 10 out of 10 just fine.  Well, as in I could pull  
> >> up, do
> >> an ls, and poke at a few other files.
> >
> > This is killing me ... I've been trying to remember the name of this
> > software for weeks.
> >
> > There's a spiffy little POSIX program out there that you can feed a  
> > file
> > and it will break it into chunks with parity.
> >
> > The concept is that you take all your important data, tar it up into a
> > single file.  Let's say the total file is 2G, which is too big for a
> > single CD.  Then, you feed it into this program and give the program
> > the switches to tell it max file size of 650M and 2 parity files.  The
> > program creates 5 files of about 650M in size, so you can burn 5 CDs.
> > The beauty is that since you created 2 parity files, you can lose up
> > to 2 CDs and your data is still recoverable, much like a RAID 5 or
> > RAID 6.
> >
> > Unfortunately, I can't remember the name of the software, and I've
> > been unable to formulate a Google search that finds it ...
> >
> > Anyone know the program I'm thinking of?
> >
> > -- 
> > Bill Moran
> > http://www.potentialtech.com
> > _______________________________________________
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> > wplug at wplug.org
> > http://www.wplug.org/mailman/listinfo/wplug
> 
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-- 
Bill Moran
http://www.potentialtech.com